LOAN AND SECURITY AGREEMENT BIOLASE TECHNOLOGY, INC.

Exhibit 10.1

BIOLASE TECHNOLOGY, INC.

This LOAN AND SECURITY AGREEMENT is entered into as of September 28, 2006, by and between COMERICA BANK (“Bank”) and BIOLASE TECHNOLOGY, INC. (“Borrower”).

RECITALS

Borrower wishes to obtain credit from time to time from Bank, and Bank desires to extend credit to Borrower. This Agreement sets forth the terms on which Bank will advance credit to Borrower, and Borrower will repay the amounts owing to Bank.

AGREEMENT

The parties agree as follows:

DEFINITIONS AND CONSTRUCTION.

1.1 Definitions. As used in this Agreement, all capitalized terms shall have the definitions set forth on Exhibit A. Any term used in the Code and not defined herein shall have the meaning given to the term in the Code.

1.2 Accounting Terms. Any accounting term not specifically defined on Exhibit A shall be construed in accordance with GAAP and all calculations shall be made in accordance with GAAP. The term “financial statements” shall include the accompanying notes and schedules.

LOAN AND TERMS OF PAYMENT.

2.1 Credit Extensions.

(a) Promise to Pay. Borrower promises to pay to Bank, in lawful money of the United States of America, the aggregate unpaid principal amount of all Credit Extensions made by Bank to Borrower, together with interest on the unpaid principal amount of such Credit Extensions at rates in accordance with the terms hereof.

(b) Advances Under Revolving Line.

(i) Amount. Subject to and upon the terms and conditions of this Agreement Borrower may request Advances in an aggregate outstanding amount not to exceed the lesser of (A) the Revolving Line or (B) the Borrowing Base, less any amounts outstanding under the Letter of Credit Sublimit and Foreign Exchange Sublimit. Notwithstanding the foregoing, Advances not exceeding Six Million Dollars ($6,000,000) may be made without regard to the Borrowing Base (collectively, the “Non-Formula Advances”). Amounts borrowed pursuant to this Section 2.1(b) may be repaid and reborrowed at any time prior to the Revolving Maturity Date, at which time all Advances under this Section 2.1(b) shall be immediately due and payable. Subject to the terms of this Agreement and the LIBOR Addendum to Loan and Security Agreement attached hereto as Exhibit F, Borrower may prepay any Advances without penalty or premium.

(ii) Form of Request. Whenever Borrower desires an Advance, Borrower will notify Bank by facsimile transmission or telephone no later than 3:00 p.m. Pacific time (1:00 p.m. Pacific time for wire transfers) on the Business Day that the Advance is to be made. Each such notification shall be promptly confirmed by a Payment/Advance Form in substantially the form of Exhibit C. Bank is authorized to make Advances under this Agreement, based upon instructions received from a Responsible Officer or a designee of a Responsible Officer, or without instructions if in Bank’s discretion such Advances are necessary to meet Obligations which have become due and remain unpaid. Bank shall be entitled to rely on any telephonic notice given by a person who Bank reasonably believes to be a Responsible Officer or a designee thereof, and Borrower shall indemnify and hold Bank harmless for any damages or loss suffered by Bank as a result of such reliance. Bank will credit the amount of Advances made under this Section 2.1(b) to Borrower’s deposit account.

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(iii) Letter of Credit Sublimit. Subject to the availability under the Revolving Line, and in reliance on the representations and warranties of Borrower set forth herein, at any time and from time to time from the date hereof through the Business Day immediately prior to the Revolving Maturity Date, Bank shall issue for the account of Borrower such Letters of Credit as Borrower may request by delivering to Bank a duly executed letter of credit application on Bank’s standard form; provided, however, that the outstanding and undrawn amounts under all such Letters of Credit (i) shall not at any time exceed the Letter of Credit Sublimit, and (ii) shall be deemed to constitute Advances for the purpose of calculating availability under the Revolving Line. Any drawn but unreimbursed amounts under any Letters of Credit shall be charged as Advances against the Revolving Line. All Letters of Credit shall be in form and substance acceptable to Bank in its sole discretion and shall be subject to the terms and conditions of Bank’s form application and letter of credit agreement. Borrower will pay any standard issuance and other fees that Bank notifies Borrower it will charge for issuing and processing Letters of Credit.

(iv) Foreign Exchange Sublimit. Subject to and upon the terms and conditions of this Agreement and any other agreement that Borrower may enter into with the Bank in connection with foreign exchange transactions (“FX Contracts”), Borrower may request Bank to enter into FX Contracts with Borrower due not later than the Revolving Maturity Date. Borrower shall pay any standard issuance and other fees that Bank notifies Borrower will be charged for issuing and processing FX Contracts for Borrower. The FX Amount shall at all times be equal to or less than One Million Dollars ($1,000,000). The “FX Amount” shall equal the amount determined by multiplying (i) the aggregate amount, in United States Dollars, of FX Contracts between Borrower and Bank remaining outstanding as of any date of determination by (ii) the applicable Foreign Exchange Reserve Percentage as of such date. The “Foreign Exchange Reserve Percentage” shall be a percentage as determined by Bank, in its sole discretion from time to time. The initial Foreign Exchange Reserve Percentage shall be ten percent (10%).

(v) Collateralization of Obligations Extending Beyond Maturity. If Borrower has not secured to Bank’s satisfaction its obligations with respect to any Letters of Credit or Foreign Exchange Contracts by the Revolving Maturity Date, then, effective as of such date, the balance in any deposit accounts held by Bank and the certificates of deposit or time deposit accounts issued by Bank in Borrower’s name (and any interest paid thereon or proceeds thereof, including any amounts payable upon the maturity or liquidation of such certificates or accounts), shall automatically secure such obligations to the extent of the then continuing or outstanding and undrawn Letters of Credit or Foreign Exchange Contracts. Borrower authorizes Bank to hold such balances in pledge and to decline to honor any drafts thereon or any requests by Borrower or any other Person to pay or otherwise transfer any part of such balances for so long as the Letters of Credit or Foreign Exchange Contracts are outstanding or continue.

2.2 Overadvances. If the aggregate amount of the outstanding Advances in excess of the Non-Formula Advances exceeds the lesser of the Revolving Line or the Borrowing Base at any time, Borrower shall immediately pay to Bank, in cash, the amount of such excess.

2.3 Interest Rates, Payments, and Calculations.

(a) Interest Rates. Except as set forth in Section 2.3(b), the Advances shall bear interest, on the outstanding daily balance thereof, as set forth in the LIBOR Addendum to Loan and Security Agreement attached as Exhibit F.

(b) Late Fee; Default Rate. If any payment is not made within 10 days after the date such payment is due, Borrower shall pay Bank a late fee equal to the lesser of (i) 5% of the amount of such unpaid amount or (ii) the maximum amount permitted to be charged under applicable law. All Obligations shall bear interest, from and after the occurrence and during the continuance of an Event of Default, at a rate equal to 5 percentage points above the interest rate applicable immediately prior to the occurrence of the Event of Default.

(c) Payments. Interest hereunder shall be due and payable on the first calendar day of each month during the term hereof. Bank shall, at its option, charge such interest, all Bank Expenses, and all Periodic Payments against any of Borrower’s deposit accounts or against the Revolving Line, in which case those amounts shall thereafter accrue interest at the rate then applicable hereunder. Any interest not paid when due shall

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be compounded by becoming a part of the Obligations, and such interest shall thereafter accrue interest at the rate then applicable hereunder.

(d) Computation. In the event the Prime Rate is changed from time to time hereafter, the applicable rate of interest hereunder shall be increased or decreased, effective as of the day the Prime Rate is changed, by an amount equal to such change in the Prime Rate. All interest chargeable under the Loan Documents shall be computed on the basis of a 360 day year for the actual number of days elapsed.

2.4 Crediting Payments. Prior to the occurrence of an Event of Default, Bank shall credit a wire transfer of funds, check or other item of payment to such deposit account or Obligation as Borrower specifies, except that to the extent Borrower uses the Advances to purchase Collateral, Borrower’s repayment of the Advances shall apply on a “first-in-first-out” basis so that the portion of the Advances used to purchase a particular item of Collateral shall be paid in the chronological order the Borrower purchased the Collateral. After the occurrence of an Event of Default, Bank shall have the right, in its sole discretion, to immediately apply any wire transfer of funds, check, or other item of payment Bank may receive to conditionally reduce Obligations, but such applications of funds shall not be considered a payment on account unless such payment is of immediately available federal funds or unless and until such check or other item of payment is honored when presented for payment. Notwithstanding anything to the contrary contained herein, any wire transfer or payment received by Bank after 12:00 noon Pacific time shall be deemed to have been received by Bank as of the opening of business on the immediately following Business Day. Whenever any payment to Bank under the Loan Documents would otherwise be due (except by reason of acceleration) on a date that is not a Business Day, such payment shall instead be due on the next Business Day, and additional fees or interest, as the case may be, shall accrue and be payable for the period of such extension.

2.5 Fees. Borrower shall pay to Bank the following:

(a) Facility Fee. On the Closing Date, a fee equal to $30,000, which shall be nonrefundable;

(b) Unused Fee. A fee equal to one quarter of one percent (0.25%) of the difference between the amount then available under the Revolving Line, and the average daily balance outstanding during the term hereof, paid quarterly in arrears, which shall be nonrefundable.

(c) Bank Expenses. On the Closing Date, all Bank Expenses incurred through the Closing Date, and, after the Closing Date, all Bank Expenses, as and when they become due.

2.6 Term. This Agreement shall become effective on the Closing Date and, subject to Section 13.7, shall continue in full force and effect for so long as any Obligations remain outstanding or Bank has any obligation to make Credit Extensions under this Agreement. Notwithstanding the foregoing, Bank shall have the right to terminate its obligation to make Credit Extensions under this Agreement immediately and without notice upon the occurrence and during the continuance of an Event of Default.

CONDITIONS OF LOANS.

3.1 Conditions Precedent to Initial Credit Extension. The obligation of Bank to make the initial Credit Extension is subject to the condition precedent that Bank shall have received, in form and substance satisfactory to Bank, the following:

(a) this Agreement;

(b) an officer’s certificate of Borrower with respect to incumbency and resolutions authorizing the execution and delivery of this Agreement;

(d) agreement to provide insurance;

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(e) LIBOR Addendum;

(f) delivery to Bank of the Voting Stock of Biolase Europe GmbH other than any Excluded Equity of Biolase Europe GmbH;

(g) executed payoff letter from Bank of the West and copy(ies) of UCC-3 financing statement(s) to be filed in connection therewith;

(h) payment of the fees and Bank Expenses then due specified in Section 2.5;

(i) current SOS Reports indicating that except for Permitted Liens, there are no other security interests or Liens of record in the Collateral;

(j) an audit of the Collateral, the results of which shall be satisfactory to Bank; and

(k) such other documents or certificates, and completion of such other matters, as Bank may reasonably deem necessary or appropriate.

3.2 Conditions Precedent to all Credit Extensions. The obligation of Bank to make each Credit Extension, including the initial Credit Extension, is further subject to the following conditions:

(a) timely receipt by Bank of the Payment/Advance Form as provided in Section 2.1; and

(b) the representations and warranties contained in Section 5 shall be true and correct in all material respects on and as of the date of such Payment/Advance Form and on the effective date of each Credit Extension as though made at and as of each such date, and no Event of Default shall have occurred and be continuing, or would exist after giving effect to such Credit Extension (provided, however, that those representations and warranties expressly referring to another date shall be true, correct and complete in all material respects as of such date). The making of each Credit Extension shall be deemed to be a representation and warranty by Borrower on the date of such Credit Extension as to the accuracy of the facts referred to in this Section 3.2.

CREATION OF SECURITY INTEREST.

4.1 Grant of Security Interest. Borrower grants and pledges to Bank a continuing security interest in the Collateral to secure prompt repayment of any and all Obligations and to secure prompt performance by Borrower of each of its covenants and duties under the Loan Documents. Except as set forth in the Schedule, such security interest constitutes a valid, first priority security interest in the presently existing Collateral, and will constitute a valid, first priority security interest in later-acquired Collateral. Borrower also hereby agrees to not sell, transfer, assign, mortgage, pledge, lease, grant a security interest in, or encumber any of its intellectual property. Notwithstanding any termination, Bank’s Lien on the Collateral shall remain in effect for so long as any Obligations are outstanding.

4.2 Perfection of Security Interest. Borrower authorizes Bank to file at any time financing statements, continuation statements, and amendments thereto that (i) either specifically describe the Collateral or describe the Collateral as all assets of Borrower of the kind pledged hereunder, and (ii) contain any other information required by the Code for the sufficiency of filing office acceptance of any financing statement, continuation statement, or amendment, including whether Borrower is an organization, the type of organization and any organizational identification number issued to Borrower, if applicable. Any such financing statements may be signed by Bank on behalf of Borrower, as provided in the Code, and may be filed at any time in any jurisdiction whether or not Revised Article 9 of the Code is then in effect in that jurisdiction. Borrower shall from time to time endorse and deliver to Bank, at the request of Bank, all Negotiable Collateral and other documents that Bank may reasonably request, in form satisfactory to Bank, to perfect and continue perfected Bank’s security interests in the Collateral and in order to fully consummate all of the transactions contemplated under the Loan Documents. Borrower shall have possession of the Collateral, except where expressly otherwise provided in this Agreement or

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where Bank chooses to perfect its security interest by possession in addition to the filing of a financing statement. Where Collateral is in possession of a third party bailee, Borrower shall take such steps as Bank reasonably requests for Bank to (i) obtain an acknowledgment, in form and substance satisfactory to Bank, of the bailee that the bailee holds such Collateral for the benefit of Bank, (ii) obtain “control” of any Collateral consisting of investment property, deposit accounts, letter-of-credit rights or electronic chattel paper (as such items and the term “control” are defined in Revised Article 9 of the Code) by causing the securities intermediary or depositary institution or issuing bank to execute a control agreement in form and substance satisfactory to Bank. Borrower will not create any chattel paper without placing a legend on the chattel paper acceptable to Bank indicating that Bank has a security interest in the chattel paper. Borrower from time to time may deposit with Bank specific cash collateral to secure specific Obligations; Borrower authorizes Bank to hold such specific balances in pledge and to decline to honor any drafts thereon or any request by Borrower or any other Person to pay or otherwise transfer any part of such balances for so long as the specific Obligations are outstanding.

4.3 Right to Inspect. Bank (through any of its officers, employees, or agents) shall have the right, upon reasonable prior notice, from time to time during Borrower’s usual business hours but no more than twice a year (unless an Event of Default has occurred and is continuing), to inspect Borrower’s Books and to make copies thereof and to check, test, and appraise the Collateral in order to verify Borrower’s financial condition or the amount, condition of, or any other matter relating to, the Collateral.

REPRESENTATIONS AND WARRANTIES.

Borrower represents and warrants as follows:

5.1 Due Organization and Qualification. Borrower and each Subsidiary is a corporation duly existing under the laws of the state or country, as applicable, in which it is incorporated and qualified and licensed to do business in any state or country, as applicable, in which the conduct of its business or its ownership of property requires that it be so qualified, except where the failure to do so would not reasonably be expected to cause a Material Adverse Effect.

5.2 Due Authorization; No Conflict. The execution, delivery, and performance of the Loan Documents are within Borrower’s powers, have been duly authorized, and are not in conflict with nor constitute a breach of any provision contained in Borrower’s Certificate of Incorporation or Bylaws, nor will they constitute an event of default under any material agreement by which Borrower is bound. Borrower is not in default under any agreement by which it is bound, except to the extent such default would not reasonably be expected to cause a Material Adverse Effect.

5.3 Collateral. Borrower has rights in or the power to transfer the Collateral, and its title to the Collateral is free and clear of Liens, adverse claims, and restrictions on transfer or pledge except for Permitted Liens. All Collateral is located solely in the Collateral States. The Eligible Accounts are bona fide existing obligations. The property or services giving rise to such Eligible Accounts has been delivered or rendered to the account debtor or its agent for immediate shipment to and unconditional acceptance by the account debtor. Borrower has not received notice of actual or imminent Insolvency Proceeding of any account debtor whose accounts are included in any Borrowing Base Certificate as an Eligible Account. All Inventory is in all material respects of good and merchantable quality, free from all material defects, except for Inventory for which adequate reserves have been made. Except as set forth in the Schedule, none of the Collateral is maintained or invested with a Person other than Bank or Bank’s Affiliates.

5.4 Intellectual Property. Borrower is the sole owner of its patents, trademarks, copyrights, and other intellectual property, except for licenses granted by Borrower to its customers in the ordinary course of business. To the best of Borrower’s knowledge, each of Borrower’s copyrights, trademarks and patents is valid and enforceable, and no part of its intellectual property has been judged invalid or unenforceable, in whole or in part, and no claim has been made to Borrower that any part of its intellectual property violates the rights of any third party except to the extent such claim would not reasonably be expected to cause a Material Adverse Effect.

5.5 Name; Location of Chief Executive Office. Except as disclosed in the Schedule, Borrower has not done business under any name other than that specified on the signature page hereof, and its exact

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legal name is as set forth in the first paragraph of this Agreement. The chief executive office of Borrower is located in the Chief Executive Office State at the address indicated in Section 10 hereof.

5.6 Litigation. Except as set forth in the Schedule, there are no actions or proceedings pending by or against Borrower or any Subsidiary before any court or administrative agency in which a likely adverse decision would reasonably be expected to have a Material Adverse Effect.

5.7 No Material Adverse Change in Financial Statements. All consolidated and consolidating financial statements related to Borrower and any Subsidiary that are delivered by Borrower to Bank fairly present in all material respects Borrower’s consolidated and consolidating financial condition as of the date thereof and Borrower’s consolidated and consolidating results of operations for the period then ended. There has not been a material adverse change in the consolidated or in the consolidating financial condition of Borrower since the date of the most recent of such financial statements submitted to Bank.

5.8 Solvency, Payment of Debts. Borrower is able to pay its debts (including trade debts) as they mature; the fair saleable value of Borrower’s assets (including goodwill minus disposition costs) exceeds the fair value of its liabilities; and Borrower is not left with unreasonably small capital after the transactions contemplated by this Agreement.

5.9 Compliance with Laws and Regulations. Borrower and each Subsidiary have met the minimum funding requirements of ERISA with respect to any employee benefit plans subject to ERISA. No event has occurred resulting from Borrower’s failure to comply with ERISA that is reasonably likely to result in Borrower’s incurring any liability that could have a Material Adverse Effect. Borrower is not an “investment company” or a company “controlled” by an “investment company” within the meaning of the Investment Company Act of 1940. Borrower is not engaged principally, or as one of the important activities, in the business of extending credit for the purpose of purchasing or carrying margin stock (within the meaning of Regulations T and U of the Board of Governors of the Federal Reserve System). Borrower has complied in all material respects with all the provisions of the Federal Fair Labor Standards Act. Borrower is in compliance with all environmental laws, regulations and ordinances except where the failure to comply is not reasonably likely to have a Material Adverse Effect. Borrower has not violated any statutes, laws, ordinances or rules applicable to it, the violation of which could reasonably be expected to have a Material Adverse Effect. Borrower and each Subsidiary have filed or caused to be filed all tax returns required to be filed, and have paid, or have made adequate provision for the payment of, all taxes reflected therein except those being contested in good faith with adequate reserves under GAAP or where the failure to file such returns or pay such taxes would not reasonably be expected to have a Material Adverse Effect.

5.10 Subsidiaries. Borrower does not own any stock, partnership interest or other equity securities of any Person, except (a) as set forth on the Schedule and (b) for Permitted Investments.

5.11 Government Consents. Borrower and each Subsidiary have obtained all consents, approvals and authorizations of, made all declarations or filings with, and given all notices to, all governmental authorities that are necessary for the continued operation of Borrower’s business as currently conducted, except where the failure to do so would not reasonably be expected to cause a Material Adverse Effect.

5.12 Inbound Licenses. Except as disclosed on the Schedule, Borrower is not a party to, nor is bound by, any license or other agreement that prohibits or otherwise restricts Borrower from granting a security interest in Borrower’s interest in such license or agreement or any other property.

5.13 Full Disclosure. No representation, warranty or other statement made by Borrower in any certificate or written statement furnished to Bank taken together with all such certificates and written statements furnished to Bank contains any untrue statement of a material fact or omits to state a material fact necessary in order to make the statements contained in such certificates or statements not misleading, it being recognized by Bank that the projections and forecasts provided by Borrower in good faith and based upon reasonable assumptions are not to be viewed as facts and that actual results during the period or periods covered by any such projections and forecasts may differ from the projected or forecasted results.

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AFFIRMATIVE COVENANTS.

Borrower covenants that, until payment in full of all outstanding Obligations, and for so long as Bank may have any commitment to make a Credit Extension hereunder, Borrower shall do all of the following:

6.1 Good Standing and Government Compliance. Borrower shall maintain its and each of its Subsidiaries’ corporate existence and good standing in the Borrower State or other applicable jurisdiction, shall maintain qualification and good standing in each other jurisdiction in which the failure to so qualify would reasonably be expected to have a Material Adverse Effect, and shall furnish to Bank the organizational identification number issued to Borrower by the authorities of the state in which Borrower is organized, if applicable. Borrower shall meet, and shall cause each Subsidiary to meet, the minimum funding requirements of ERISA with respect to any employee benefit plans subject to ERISA. Borrower shall comply in all material respects with all applicable Environmental Laws, and maintain all material permits, licenses and approvals required thereunder where the failure to do so would reasonably be expected to have a Material Adverse Effect. Borrower shall comply, and shall cause each Subsidiary to comply, with all statutes, laws, ordinances and government rules and regulations to which it is subject, and shall maintain, and shall cause each of its Subsidiaries to maintain, in force all licenses, approvals and agreements, the loss of which or failure to comply with which would reasonably be expected to have a Material Adverse Effect.

6.2 Financial Statements, Reports, Certificates. Borrower shall deliver to Bank: (i) as soon as available, but in any event within 30 days after the end of each calendar month, a company prepared consolidated and consolidating balance sheet and income statement covering Borrower’s operations during such period, in a form reasonably acceptable to Bank and certified by a Responsible Officer; (ii) as soon as available, but in any event within 95 days after the end of Borrower’s fiscal year, audited consolidated financial statements of Borrower prepared in accordance with GAAP, consistently applied, together with an opinion which is unqualified or otherwise consented to in writing by Bank on such financial statements of an independent certified public accounting firm reasonably acceptable to Bank; (iii) copies of all statements, reports and notices sent or made available generally by Borrower to its security holders or to any holders of Subordinated Debt; (iv) promptly upon receipt of notice thereof, a report of any legal actions pending or threatened against Borrower or any Subsidiary that could result in damages or costs to Borrower or any Subsidiary of $250,000 or more; (v) promptly upon receipt, each management letter prepared by Borrower’s independent certified public accounting firm and delivered to Borrower’s Board of Directors regarding Borrower’s management control systems; (vi) within 30 days after the end of Borrower’s fiscal year, an annual financial forecast, which shall include quarterly balance sheets and income statements, (in form and substance acceptable to Bank) for the immediately subsequent fiscal year; and (vii) such budgets, sales projections, operating plans or other financial information generally prepared by Borrower in the ordinary course of business as Bank may reasonably request from time to time.

(a) So long as any formula based Advances are outstanding, within 30 days after the last day of each month, Borrower shall deliver to Bank a Borrowing Base Certificate signed by a Responsible Officer in substantially the form of Exhibit D hereto, together with aged listings by invoice date of accounts receivable and accounts payable and an inventory report.

(b) Within 30 days after the last day of each month, Borrower shall deliver to Bank with the monthly financial statements a Compliance Certificate certified as of the last day of the applicable month and signed by a Responsible Officer in substantially the form of Exhibit E hereto.

(c) As soon as possible and in any event within 3 calendar days after becoming aware of the occurrence or existence of an Event of Default hereunder, a written statement of a Responsible Officer setting forth details of the Event of Default, and the action which Borrower has taken or proposes to take with respect thereto.

(d) Bank shall have a right from time to time hereafter to audit Borrower’s Accounts and appraise Collateral at Borrower’s expense, provided that such audits will be conducted no more often than every 6 months unless an Event of Default has occurred and is continuing.

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Borrower may deliver to Bank on an electronic basis any certificates, reports or information required pursuant to this Section 6.2, and Bank shall be entitled to rely on the information contained in the electronic files, provided that Bank in good faith believes that the files were delivered by a Responsible Officer. If Borrower delivers this information electronically and unsigned, it shall also deliver to Bank by U.S. Mail, reputable overnight courier service, hand delivery, facsimile or electronic delivery of a “PDF” file within 5 Business Days of submission of the unsigned electronic copy the certification of monthly financial statements, the Borrowing Base Certificate and the Compliance Certificate, each bearing the physical signature of the Responsible Officer.

6.3 Inventory; Returns. Borrower shall keep all Inventory in good and merchantable condition, free from all material defects except for Inventory for which adequate reserves have been made. Returns and allowances, if any, as between Borrower and its account debtors shall be on the same basis and in accordance with the usual customary practices of Borrower, as they exist on the Closing Date. Borrower shall promptly notify Bank of any sales returns and any inventory-related disputes and claims which individually involve more than $100,000.

6.4 Taxes. Borrower shall make, and cause each Subsidiary to make, due and timely payment or deposit of all material federal, state, and local taxes, assessments, or contributions required of it by law, including, but not limited to, those laws concerning income taxes, F.I.C.A., F.U.T.A. and state disability, and will execute and deliver to Bank, on demand, proof satisfactory to Bank indicating that Borrower or a Subsidiary has made such payments or deposits and any appropriate certificates attesting to the payment or deposit thereof; provided that Borrower or a Subsidiary need not make any payment if the amount or validity of such payment is contested in good faith by appropriate proceedings and is reserved against (to the extent required by GAAP) by Borrower.

6.5 Insurance.

(a) Borrower, at its expense, shall keep the Collateral insured against loss or damage by fire, theft, explosion, sprinklers, and all other hazards and risks, and in such amounts, as ordinarily insured against by other owners in similar businesses conducted in the locations where Borrower’s business is conducted on the date hereof. Borrower shall also maintain liability and other insurance in amounts and of a type that are customary to businesses similar to Borrower’s.

(b) All such policies of insurance shall be with responsible and reputable insurance companies and of such amounts and types as is usually carried by companies engaged in similar businesses and owning similar properties in the same general areas as Borrower. All policies of property insurance shall contain a lender’s loss payable endorsement, in a form satisfactory to Bank, showing Bank as an additional loss payee, and all liability insurance policies shall show Bank as an additional insured and specify that the insurer must give at least 20 days notice to Bank before canceling its policy for any reason. Upon Bank’s request, Borrower shall deliver to Bank certified copies of the policies of insurance and evidence of all premium payments. If no Event of Default has occurred and is continuing, proceeds payable under any casualty policy will, at Borrower’s option, be payable to Borrower to replace the property subject to the claim, provided that any such replacement property shall be deemed Collateral in which Bank has been granted a first priority security interest. If an Event of Default has occurred and is continuing, all proceeds payable under any such policy shall, at Bank’s option, be payable to Bank to be applied on account of the Obligations.

6.6 Primary Depository. Borrower shall maintain all its primary depository, operating and investment accounts with Bank or Bank’s Affiliates.

6.7 Financial Covenants. Borrower shall at all times maintain the following financial ratios and covenants:

(a) Effective Tangible Net Worth. A Tangible Net Worth plus Subordinated Debt (hereinafter called “ETNW”) of not less than (a) $9,000,000 plus 50% of Consolidated Net Income measured on a quarterly basis.

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(b) Total Liabilities Minus Subordinated Debt to ETNW. A ratio of Total Liabilities less deferred revenue and less Subordinated Debt to ETNW of not more than 2.30 to 1.00, measured on a quarterly basis.

(d) Liquidity Ratio. A ratio of Liquidity to all Indebtedness (other than any Contingent Obligations) owing to Bank of at least 1.50 to 1.00, measured on a monthly basis.

6.8 Creation/Acquisition of Subsidiaries. In the event Borrower or any Subsidiary creates or acquires any Subsidiary, Borrower and such Subsidiary shall promptly notify Bank of the creation or acquisition of such new Subsidiary and take all such action as may be reasonably required by Bank to cause each domestic Subsidiary to guarantee the Obligations of Borrower under the Loan Documents and grant a continuing pledge and security interest in and to the Collateral of such domestic Subsidiary (substantially as described on Exhibit B hereto), and Borrower shall grant and pledge to Bank a perfected security interest in 65% of the stock, units or other evidence of ownership of any foreign Subsidiary in the event that the assets of such foreign subsidiary constitute 5% or more of the total consolidated assets of Borrower and all of its subsidiaries taken as a whole.

6.9 Further Assurances. At any time and from time to time Borrower shall execute and deliver such further instruments and take such further action as may reasonably be requested by Bank to effect the purposes of this Agreement.

NEGATIVE COVENANTS.

Borrower covenants and agrees that, so long as any credit hereunder shall be available and until the outstanding Obligations are paid in full or for so long as Bank may have any commitment to make any Credit Extensions, Borrower will not do any of the following without Bank’s prior written consent.

7.1 Dispositions. Convey, sell, lease, license, transfer or otherwise dispose of (collectively, to “Transfer”), or permit any of its Subsidiaries to Transfer, all or any part of its business or property, other than Permitted Transfers.

7.2 Change in Name, Location, Executive Office, or Executive Management; Change in Business; Change in Fiscal Year; Change in Control. Change its name or the Borrower State or relocate its chief executive office without 30 days prior written notification to Bank; replace its chief executive officer or chief financial officer without 30 days prior written notification to Bank; engage in any business, or permit any of its Subsidiaries to engage in any business, other than or reasonably related or incidental to the businesses currently engaged in by Borrower; or change its fiscal year end.

7.3 Mergers or Acquisitions. Merge or consolidate, or permit any of its Subsidiaries to merge or consolidate, with or into any other business organization (other than mergers or consolidations of a Subsidiary into another Subsidiary or into Borrower), or acquire, or permit any of its Subsidiaries to acquire, all or substantially all of the capital stock or property of another Person except where (i) such transactions do not in the aggregate exceed $250,000 during any fiscal year, (ii) no Event of Default has occurred, is continuing or would exist after giving effect to such transactions, (iii)such transactions do not result in a Change in Control, and (iv) Borrower is the surviving entity.

7.4 Indebtedness. Create, incur, assume, guarantee or be or remain liable with respect to any Indebtedness, or permit any Subsidiary so to do, other than Permitted Indebtedness, or prepay any Indebtedness or take any actions which impose on Borrower an obligation to prepay any Indebtedness, except Indebtedness to Bank.

7.5 Encumbrances. Create, incur, assume or allow any Lien with respect to any of its property, including its intellectual property, or assign or otherwise convey any right to receive income, including the sale of any Accounts, or permit any of its Subsidiaries so to do, except for Permitted Liens, or covenant to any other

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Person that Borrower in the future will refrain from creating, incurring, assuming or allowing any Lien with respect to any of Borrower’s property, including Borrower’s intellectual property.

7.6 Distributions. Pay any dividends or make any other distribution or payment on account of or in redemption, retirement or purchase of any capital stock, except that Borrower may (i) repurchase the stock of former employees pursuant to stock repurchase agreements as long as an Event of Default does not exist prior to such repurchase or would not exist after giving effect to such repurchase, and (ii) repurchase the stock of former employees pursuant to stock repurchase agreements by the cancellation of indebtedness owed by such former employees to Borrower regardless of whether an Event of Default exists.

7.7 Investments. Directly or indirectly acquire or own, or make any Investment in or to any Person, or permit any of its Subsidiaries so to do, other than Permitted Investments, or maintain or invest any of its property with a Person other than Bank or Bank’s Affiliates or permit any Subsidiary to do so unless such Person has entered into a control agreement with Bank, in form and substance satisfactory to Bank, or suffer or permit any Subsidiary to be a party to, or be bound by, an agreement that restricts such Subsidiary from paying dividends or otherwise distributing property to Borrower.

7.8 Transactions with Affiliates. Directly or indirectly enter into or permit to exist any material transaction with any Affiliate of Borrower except for transactions that are in the ordinary course of Borrower’s business, upon fair and reasonable terms that are no less favorable to Borrower than would be obtained in an arm’s length transaction with a non-affiliated Person.

7.9 Subordinated Debt. Make any payment in respect of any Subordinated Debt, or permit any of its Subsidiaries to make any such payment, except in compliance with the terms of such Subordinated Debt, or amend any provision affecting Bank’s rights contained in any documentation relating to the Subordinated Debt without Bank’s prior written consent.

7.10 Inventory and Equipment. Store the Inventory or the Equipment with a bailee, warehouseman, or similar third party unless the third party has been notified of Bank’s security interest and Bank (a) has received an acknowledgment from the third party that it is holding or will hold the Inventory or Equipment for Bank’s benefit or (b) is in possession of the warehouse receipt, where negotiable, covering such Inventory or Equipment. Except for (x) Inventory of foreign subsidiaries, (y) Inventory sold in the ordinary course of business, and (z) other inventory, the aggregate value of which is not greater than $200,000 except for such other locations as Bank may approve in writing, Borrower shall keep the Inventory and Equipment only at the location set forth in Section 10 and such other locations of which Borrower gives Bank prior written notice and as to which Bank files a financing statement where needed to perfect its security interest.

7.11 No Investment Company; Margin Regulation. Become or be controlled by an “investment company,” within the meaning of the Investment Company Act of 1940, or become principally engaged in, or undertake as one of its important activities, the business of extending credit for the purpose of purchasing or carrying margin stock, or use the proceeds of any Credit Extension for such purpose.

EVENTS OF DEFAULT.

Any one or more of the following events shall constitute an Event of Default by Borrower under this Agreement:

8.1 Payment Default. If (a) Borrower fails to pay any of the principal of the Obligations when due, (b) Borrower fails to pay any interest on the obligations when due or any fee due hereunder and such nonpayment continues for a period of five (5) days after the due date thereof, or (c) Borrower fails to pay any other amount due hereunder (other than principal, interest or fees) and such nonpayment continues for a period of ten (10) days after the due date thereof;

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8.2 Covenant Default.

(a) If Borrower (i) fails to perform any covenant under Article 6 and such failure shall remain unremedied for 10 days or (ii) violates any of the covenants contained in Article 7 of this Agreement; or

(b) If Borrower fails or neglects to perform or observe any other material term, provision, condition or covenant contained in this Agreement or in any of the Loan Documents, and as to any default under such other term, provision, condition or covenant that can be cured, has failed to cure such default within 10 days after Borrower receives notice thereof or any officer of Borrower becomes aware thereof; provided, however, that if the default cannot by its nature be cured within the 10 day period or cannot after diligent attempts by Borrower be cured within such 10 day period, and such default is likely to be cured within a reasonable time, then Borrower shall have an additional reasonable period (which shall not in any case exceed 30 days) to attempt to cure such default, and within such reasonable time period the failure to have cured such default shall not be deemed an Event of Default but no Credit Extensions will be made;

8.3 Material Adverse Change. If there occurs a material adverse change in Borrower’s business or financial condition, or if there is a material impairment in the prospect of repayment of any portion of the Obligations or a material impairment in the perfection, value or priority of Bank’s security interests in the Collateral;

8.4 Attachment. If any material portion of Borrower’s assets is attached, seized, subjected to a writ or distress warrant, or is levied upon, or comes into the possession of any trustee, receiver or person acting in a similar capacity and such attachment, seizure, writ or distress warrant or levy has not been removed, discharged or rescinded within 10 days, or if Borrower is enjoined, restrained, or in any way prevented by court order from continuing to conduct all or any material part of its business affairs, or if a judgment or other claim becomes a lien or encumbrance upon any material portion of Borrower’s assets, or if a notice of lien, levy, or assessment is filed of record with respect to any of Borrower’s assets by the United States Government, or any department, agency, or instrumentality thereof, or by any state, county, municipal, or governmental agency, and the same is not paid within ten days after Borrower receives notice thereof, provided that none of the foregoing shall constitute an Event of Default where such action or event is stayed or an adequate bond has been posted pending a good faith contest by Borrower or where the fair value of such assets are known and Borrower has been justly compensated (provided that no Credit Extensions will be made during such cure period);

8.5 Insolvency. If Borrower becomes insolvent, or if an Insolvency Proceeding is commenced by Borrower, or if an Insolvency Proceeding is commenced against Borrower and is not dismissed or stayed within 60 days (provided that no Credit Extensions will be made prior to the dismissal of such Insolvency Proceeding);

8.6 Other Agreements. If there is a default or other failure to perform in any agreement to which Borrower is a party with a third party or parties resulting in a right by such third party or parties, whether or not exercised, to accelerate the maturity of any Indebtedness in an amount in excess of $250,000 or that would reasonably be expected to have a Material Adverse Effect;

8.7 Subordinated Debt. If Borrower makes any payment on account of Subordinated Debt, except in compliance with the terms of such Subordinated Debt or except to the extent the payment is allowed under any subordination agreement entered into with Bank;

8.8 Judgments. If a final judgment or final judgments for the payment of money in an amount, individually or in the aggregate, of at least $500,000 shall be rendered against Borrower and shall remain unsatisfied and unstayed for a period of 10 days (provided that no Credit Extensions will be made prior to the satisfaction or stay of the judgment);

8.9 Misrepresentations. If any material misrepresentation or material misstatement exists now or hereafter in any warranty or representation set forth herein or in any certificate delivered to Bank by any Responsible Officer pursuant to this Agreement or to induce Bank to enter into this Agreement or any other Loan Document except to the extent that the making of any such misrepresentation or misstatement would not have and would not reasonably be likely to have a Material Adverse Effect;

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8.10 Guaranty. If any guaranty of all or a portion of the Obligations (a “Guaranty) ceases for any reason to be in full force and effect, or any guarantor fails to perform any obligation under any Guaranty or a security agreement securing any Guaranty (collectively, the “Guaranty Documents”), or any event of default occurs under any Guaranty Document or any guarantor revokes or purports to revoke a Guaranty, or any material misrepresentation or material misstatements exists now or hereafter in any warranty or representation set forth in any Guaranty Document or in any certificate delivered to Bank in connection with any Guaranty Document except to the extent the making of any such misrepresentation or misstatement would not reasonably be likely to have a Material Adverse Effect or if any of the circumstances described in Sections 8.3 through 8.9 occur with respect to any guarantor;

8.11 Change of Control. If a Change in Control occurs.

BANK’S RIGHTS AND REMEDIES.

(a) Rights and Remedies. Upon the occurrence and during the continuance of an Event of Default, Bank may, at its election, without notice of its election and without demand, do any one or more of the following, all of which are authorized by Borrower:

(b) Declare all Obligations, whether evidenced by this Agreement or by any of the other Loan Documents, immediately due and payable (provided that upon the occurrence of an Event of Default described in Section 8.6, all Obligations shall become immediately due and payable without any action by Bank);

(c) Demand that Borrower (i) deposit cash with Bank in an amount equal to the amount of any Letters of Credit remaining undrawn, as collateral security for the repayment of any future drawings under such Letters of Credit, and (ii) pay in advance all Letter of Credit fees scheduled to be paid or payable over the remaining term of the Letters of Credit, and Borrower shall promptly deposit and pay such amounts;

(d) Cease advancing money or extending credit to or for the benefit of Borrower under this Agreement or under any other agreement between Borrower and Bank;

(e) Settle or adjust disputes and claims directly with account debtors for amounts, upon terms and in whatever order that Bank reasonably considers advisable;

(f) Make such payments and do such acts as Bank considers necessary or reasonable to protect its security interest in the Collateral. Borrower agrees to assemble the Collateral if Bank so requires, and to make the Collateral available to Bank as Bank may designate. Borrower authorizes Bank to enter the premises where the Collateral is located, to take and maintain possession of the Collateral, or any part of it, and to pay, purchase, contest, or compromise any encumbrance, charge, or lien which in Bank’s determination appears to be prior or superior to its security interest and to pay all expenses incurred in connection therewith. With respect to any of Borrower’s owned premises, Borrower hereby grants Bank a license to enter into possession of such premises and to occupy the same, without charge, in order to exercise any of Bank’s rights or remedies provided herein, at law, in equity, or otherwise;

(g) Set off and apply to the Obligations any and all (i) balances and deposits of Borrower held by Bank, and (ii) indebtedness at any time owing to or for the credit or the account of Borrower held by Bank;

(h) Ship, reclaim, recover, store, finish, maintain, repair, prepare for sale, advertise for sale, and sell (in the manner provided for herein) the Collateral. Bank is hereby granted a license or other right, solely pursuant to the provisions of this Section 9.1, to use, without charge, Borrower’s labels, patents, copyrights, rights of use of any name, trade secrets, trade names, trademarks, service marks, and advertising matter, or any property of a similar nature, as it pertains to the Collateral, in completing production of, advertising for sale, and selling any Collateral and, in connection with Bank’s exercise of its rights under this Section 9.1, Borrower’s rights under all licenses and all franchise agreements shall inure to Bank’s benefit;

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(i) Sell the Collateral at either a public or private sale, or both, by way of one or more contracts or transactions, for cash or on terms, in such manner and at such places (including Borrower’s premises) as Bank determines is commercially reasonable, and apply any proceeds to the Obligations in whatever manner or order Bank deems appropriate. Bank may sell the Collateral without giving any warranties as to the Collateral. Bank may specifically disclaim any warranties of title or the like. This procedure will not be considered adversely to affect the commercial reasonableness of any sale of the Collateral. If Bank sells any of the Collateral upon credit, Borrower will be credited only with payments actually made by the purchaser, received by Bank, and applied to the indebtedness of the purchaser. If the purchaser fails to pay for the Collateral, Bank may resell the Collateral and Borrower shall be credited with the proceeds of the sale;

(j) Bank may credit bid and purchase at any public sale;

(k) Apply for the appointment of a receiver, trustee, liquidator or conservator of the Collateral, without notice and without regard to the adequacy of the security for the Obligations and without regard to the solvency of Borrower, any guarantor or any other Person liable for any of the Obligations; and

(l) Any deficiency that exists after disposition of the Collateral as provided above will be paid immediately by Borrower.

Bank may comply with any applicable state or federal law requirements in connection with a disposition of the Collateral and compliance will not be considered adversely to affect the commercial reasonableness of any sale of the Collateral.

9.2 Power of Attorney. Effective only upon the occurrence and during the continuance of an Event of Default, Borrower hereby irrevocably appoints Bank (and any of Bank’s designated officers, or employees) as Borrower’s true and lawful attorney to: (a) send requests for verification of Accounts or notify account debtors of Bank’s security interest in the Accounts; (b) endorse Borrower’s name on any checks or other forms of payment or security that may come into Bank’s possession; (c) sign Borrower’s name on any invoice or ▇▇▇▇ of lading relating to any Account, drafts against account debtors, schedules and assignments of Accounts, verifications of Accounts, and notices to account debtors; (d) dispose of any Collateral; (e) make, settle, and adjust all claims under and decisions with respect to Borrower’s policies of insurance; and (f) settle and adjust disputes and claims respecting the accounts directly with account debtors, for amounts and upon terms which Bank determines to be reasonable. The appointment of Bank as Borrower’s attorney in fact, and each and every one of Bank’s rights and powers, being coupled with an interest, is irrevocable until all of the Obligations have been fully repaid and performed and Bank’s obligation to provide advances hereunder is terminated.

9.3 Accounts Collection. At any time after the occurrence and during the continuation of an Event of Default, Bank may notify any Person owing funds to Borrower of Bank’s security interest in such funds and verify the amount of such Account. Borrower shall collect all amounts owing to Borrower for Bank, receive in trust all payments as Bank’s trustee, and immediately deliver such payments to Bank in their original form as received from the account debtor, with proper endorsements for deposit.

9.4 Bank Expenses. If Borrower fails to pay any amounts or furnish any required proof of payment due to third persons or entities, as required under the terms of this Agreement, then Bank may do any or all of the following after reasonable notice to Borrower: (a) make payment of the same or any part thereof; (b) set up such reserves under the Revolving Line as Bank deems necessary to protect Bank from the exposure created by such failure; or (c) obtain and maintain insurance policies of the type discussed in Section 6.5 of this Agreement, and take any action with respect to such policies as Bank deems prudent. Any amounts so paid or deposited by Bank shall constitute Bank Expenses, shall be immediately due and payable, and shall bear interest at the then applicable rate hereinabove provided, and shall be secured by the Collateral. Any payments made by Bank shall not constitute an agreement by Bank to make similar payments in the future or a waiver by Bank of any Event of Default under this Agreement.

9.5 Bank’s Liability for Collateral. Bank has no obligation to clean up or otherwise prepare the Collateral for sale. All risk of loss, damage or destruction of the Collateral shall be borne by Borrower.

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9.6 No Obligation to Pursue Others. Bank has no obligation to attempt to satisfy the Obligations by collecting them from any other person liable for them and Bank may release, modify or waive any collateral provided by any other Person to secure any of the Obligations, all without affecting Bank’s rights against Borrower. Borrower waives any right it may have to require Bank to pursue any other Person for any of the Obligations.

9.7 Remedies Cumulative. Bank’s rights and remedies under this Agreement, the Loan Documents, and all other agreements shall be cumulative. Bank shall have all other rights and remedies not inconsistent herewith as provided under the Code, by law, or in equity. No exercise by Bank of one right or remedy shall be deemed an election, and no waiver by Bank of any Event of Default on Borrower’s part shall be deemed a continuing waiver. No delay by Bank shall constitute a waiver, election, or acquiescence by it. No waiver by Bank shall be effective unless made in a written document signed on behalf of Bank and then shall be effective only in the specific instance and for the specific purpose for which it was given. Borrower expressly agrees that this Section 9.7 may not be waived or modified by Bank by course of performance, conduct, estoppel or otherwise.

9.8 Demand; Protest. Except as otherwise provided in this Agreement, Borrower waives demand, protest, notice of protest, notice of default or dishonor, notice of payment and nonpayment and any other notices relating to the Obligations.

10.

NOTICES.

Unless otherwise provided in this Agreement, all notices or demands by any party relating to this Agreement or any other agreement entered into in connection herewith shall be in writing and (except for financial statements and other informational documents which may be sent by first-class mail, postage prepaid) shall be personally delivered or sent by a recognized overnight delivery service, certified mail, postage prepaid, return receipt requested, or by telefacsimile to Borrower or to Bank, as the case may be, at its addresses set forth below:


If to Borrower:		BIOLASE Technology, Inc. ▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ Attn: Chief Financial Officer FAX: (▇▇▇) ▇▇▇-▇▇▇▇
If to Bank:		Comerica Bank 75 East ▇▇▇▇▇▇▇ Road, M/C 4770 ▇▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇ Attn: Manager FAX: (▇▇▇) ▇▇▇-▇▇▇▇
with a copy to:		Comerica Bank Technology & Life Sciences Division ▇▇▇ ▇▇▇▇▇ ▇▇▇▇., ▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇ Attn: ▇▇▇▇ ▇▇▇▇▇▇ FAX: (▇▇▇) ▇▇▇-▇▇▇▇

The parties hereto may change the address at which they are to receive notices hereunder, by notice in writing in the foregoing manner given to the other.

11.

CHOICE OF LAW AND VENUE; JURY TRIAL WAIVER.

This Agreement shall be governed by, and construed in accordance with, the internal laws of the State of California, without regard to principles of conflicts of law. Each of Borrower and Bank hereby submits to the exclusive jurisdiction of the state and Federal courts located in the County of Santa ▇▇▇▇▇, State of California. THE UNDERSIGNED ACKNOWLEDGE THAT THE RIGHT TO TRIAL BY JURY IS A CONSTITUTIONAL ONE,

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BUT THAT IT MAY BE WAIVED UNDER CERTAIN CIRCUMSTANCES. TO THE EXTENT PERMITTED BY LAW, EACH PARTY, AFTER CONSULTING (OR HAVING HAD THE OPPORTUNITY TO CONSULT) WITH COUNSEL OF ITS CHOICE, KNOWINGLY AND VOLUNTARILY, AND FOR THE MUTUAL BENEFIT OF ALL PARTIES, WAIVES ANY RIGHT TO TRIAL BY JURY IN THE EVENT OF LITIGATION ARISING OUT OF OR RELATED TO THIS AGREEMENT OR ANY OTHER DOCUMENT, INSTRUMENT OR AGREEMENT BETWEEN THE UNDERSIGNED PARTIES.

12.

JUDICIAL REFERENCE PROVISION

(a) In the event the Jury Trial Waiver set forth above is not enforceable, the parties elect to proceed under this Judicial Reference Provision.

(b) With the exception of the items specified in clause (c), below, any controversy, dispute or claim (each, a “Claim”) between the parties arising out of or relating to this Agreement or any other document, instrument or agreement between the undersigned parties and pertaining hereto (collectively in this Section, the “Comerica Documents”), will be resolved by a reference proceeding in California in accordance with the provisions of Sections 638 et seq. of the California Code of Civil Procedure (“CCP”), or their successor sections, which shall constitute the exclusive remedy for the resolution of any Claim, including whether the Claim is subject to the reference proceeding. Except as otherwise provided in the Comerica Documents, venue for the reference proceeding will be in the state or federal court in the county or district where the real property involved in the action, if any, is located or in the state or federal court in the county or district where venue is otherwise appropriate under applicable law (the “Court”).

(c) The matters that shall not be subject to a reference are the following: (i) nonjudicial foreclosure of any security interests in real or personal property, (ii) exercise of self-help remedies (including, without limitation, set-off), (iii) appointment of a receiver and (iv) temporary, provisional or ancillary remedies (including, without limitation, writs of attachment, writs of possession, temporary restraining orders or preliminary injunctions). This reference provision does not limit the right of any party to exercise or oppose any of the rights and remedies described in clauses (i) and (ii) or to seek or oppose from a court of competent jurisdiction any of the items described in clauses (iii) and (iv). The exercise of, or opposition to, any of those items does not waive the right of any party to a reference pursuant to this reference provision as provided herein.

(d) The referee shall be a retired judge or justice selected by mutual written agreement of the parties. If the parties do not agree within ten (10) days of a written request to do so by any party, then, upon request of any party, the referee shall be selected by the Presiding Judge of the Court (or his or her representative). A request for appointment of a referee may be heard on an ex parte or expedited basis, and the parties agree that irreparable harm would result if ex parte relief is not granted. Pursuant to CCP § 170.6, each party shall have one peremptory challenge to the referee selected by the Presiding Judge of the Court (or his or her representative).

(e) The parties agree that time is of the essence in conducting the reference proceedings. Accordingly, the referee shall be requested, subject to change in the time periods specified herein for good cause shown, to (i) set the matter for a status and trial-setting conference within fifteen (15) days after the date of selection of the referee, (ii) if practicable, try all issues of law or fact within one hundred twenty (120) days after the date of the conference and (iii) report a statement of decision within twenty (20) days after the matter has been submitted for decision.

(f) The referee will have power to expand or limit the amount and duration of discovery. The referee may set or extend discovery deadlines or cutoffs for good cause, including a party’s failure to provide requested discovery for any reason whatsoever. Unless otherwise ordered based upon good cause shown, no party shall be entitled to “priority” in conducting discovery, depositions may be taken by either party upon seven (7) days written notice, and all other discovery shall be responded to within fifteen (15) days after service. All disputes relating to discovery which cannot be resolved by the parties shall be submitted to the referee whose decision shall be final and binding.

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(g) Except as expressly set forth herein, the referee shall determine the manner in which the reference proceeding is conducted including the time and place of hearings, the order of presentation of evidence, and all other questions that arise with respect to the course of the reference proceeding. All proceedings and hearings conducted before the referee, except for trial, shall be conducted without a court reporter, except that when any party so requests, a court reporter will be used at any hearing conducted before the referee, and the referee will be provided a courtesy copy of the transcript. The party making such a request shall have the obligation to arrange for and pay the court reporter. Subject to the referee’s power to award costs to the prevailing party, the parties will equally share the cost of the referee and the court reporter at trial.

(h) The referee shall be required to determine all issues in accordance with existing case law and the statutory laws of the State of California. The rules of evidence applicable to proceedings at law in the State of California will be applicable to the reference proceeding. The referee shall be empowered to enter equitable as well as legal relief, enter equitable orders that will be binding on the parties and rule on any motion which would be authorized in a court proceeding, including without limitation motions for summary judgment or summary adjudication. The referee shall issue a decision at the close of the reference proceeding which disposes of all claims of the parties that are the subject of the reference. Pursuant to CCP § 644, such decision shall be entered by the Court as a judgment or an order in the same manner as if the action had been tried by the Court and any such decision will be final, binding and conclusive. The parties reserve the right to appeal from the final judgment or order or from any appealable decision or order entered by the referee. The parties reserve the right to findings of fact, conclusions of laws, a written statement of decision, and the right to move for a new trial or a different judgment, which new trial, if granted, is also to be a reference proceeding under this provision.

(i) If the enabling legislation which provides for appointment of a referee is repealed (and no successor statute is enacted), any dispute between the parties that would otherwise be determined by reference procedure will be resolved and determined by arbitration. The arbitration will be conducted by a retired judge or justice, in accordance with the California Arbitration Act §1280 through §1294.2 of the CCP as amended from time to time. The limitations with respect to discovery set forth above shall apply to any such arbitration proceeding.

(j) THE PARTIES RECOGNIZE AND AGREE THAT ALL CONTROVERSIES, DISPUTES AND CLAIMS RESOLVED UNDER THIS REFERENCE PROVISION WILL BE DECIDED BY A REFEREE AND NOT BY A JURY. AFTER CONSULTING (OR HAVING HAD THE OPPORTUNITY TO CONSULT) WITH COUNSEL OF ITS OWN CHOICE, EACH PARTY KNOWINGLY AND VOLUNTARILY, AND FOR THE MUTUAL BENEFIT OF ALL PARTIES, AGREES THAT THIS REFERENCE PROVISION WILL APPLY TO ANY CONTROVERSY, DISPUTE OR CLAIM BETWEEN OR AMONG THEM ARISING OUT OF OR IN ANY WAY RELATED TO, THIS AGREEMENT OR THE OTHER COMERICA DOCUMENTS.

13.

GENERAL PROVISIONS.

13.1 Successors and Assigns. This Agreement shall bind and inure to the benefit of the respective successors and permitted assigns of each of the parties and shall bind all persons who become bound as a debtor to this Agreement; provided, however, that neither this Agreement nor any rights hereunder may be assigned by Borrower without Bank’s prior written consent, which consent may be granted or withheld in Bank’s sole discretion. Bank shall have the right without the consent of or notice to Borrower to sell, transfer, negotiate, or grant participation in all or any part of, or any interest in, Bank’s obligations, rights and benefits hereunder.

13.2 Indemnification. Borrower shall defend, indemnify and hold harmless Bank and its officers, employees, and agents against: (a) all obligations, demands, claims, and liabilities claimed or asserted by any other party in connection with the transactions contemplated by this Agreement; and (b) all losses or Bank Expenses in any way suffered, incurred, or paid by Bank, its officers, employees and agents as a result of or in any way arising out of, following, or consequential to transactions between Bank and Borrower whether under this Agreement, or otherwise (including without limitation reasonable attorneys fees and expenses), except for losses caused by Bank’s gross negligence or willful misconduct.

13.3 Time of Essence. Time is of the essence for the performance of all obligations set forth in this Agreement.

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13.4 Severability of Provisions. Each provision of this Agreement shall be severable from every other provision of this Agreement for the purpose of determining the legal enforceability of any specific provision.

13.5 Amendments in Writing, Integration. All amendments to or terminations of this Agreement or the other Loan Documents must be in writing. All prior agreements, understandings, representations, warranties, and negotiations between the parties hereto with respect to the subject matter of this Agreement and the other Loan Documents, if any, are merged into this Agreement and the Loan Documents.

13.6 Counterparts. This Agreement may be executed in any number of counterparts and by different parties on separate counterparts, each of which, when executed and delivered, shall be deemed to be an original, and all of which, when taken together, shall constitute but one and the same Agreement.

13.7 Survival. All covenants, representations and warranties made in this Agreement shall continue in full force and effect so long as any Obligations remain outstanding or Bank has any obligation to make any Credit Extension to Borrower. The obligations of Borrower to indemnify Bank with respect to the expenses, damages, losses, costs and liabilities described in Section 13.2 shall survive until all applicable statute of limitations periods with respect to actions that may be brought against Bank have run.

13.8 Confidentiality. In handling any confidential information, Bank and all employees and agents of Bank shall exercise the same degree of care that Bank exercises with respect to its own proprietary information of the same types to maintain the confidentiality of any non-public information thereby received or received pursuant to this Agreement except that disclosure of such information may be made (i) to the subsidiaries or Affiliates of Bank in connection with their present or prospective business relations with Borrower, (ii) to prospective transferees or purchasers of any interest in the Loans, provided that they have entered into a comparable confidentiality agreement in favor of Borrower and have delivered a copy to Borrower, (iii) as required by law, regulations, rule or order, subpoena, judicial order or similar order, (iv) as may be required in connection with the examination, audit or similar investigation of Bank and (v) as Bank may determine in connection with the enforcement of any remedies hereunder. Confidential information hereunder shall not include information that either: (a) is in the public domain or in the knowledge or possession of Bank when disclosed to Bank, or becomes part of the public domain after disclosure to Bank through no fault of Bank; or (b) is disclosed to Bank by a third party, provided Bank does not have actual knowledge that such third party is prohibited from disclosing such information.

[Remainder of Page Intentionally Left Blank]

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IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be executed as of the date first above written.


BIOLASE TECHNOLOGY, INC.

By:

Name:

Title:


COMERICA BANK

By:

Name:

Title:

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EXHIBIT A

DEFINITIONS

“Accounts” means all presently existing and hereafter arising accounts, contract rights, payment intangibles and all other forms of obligations owing to Borrower arising out of the sale or lease of goods (including, without limitation, the licensing of software and other technology) or the rendering of services by Borrower and any and all credit insurance, guaranties, and other security therefor, as well as all merchandise returned to or reclaimed by Borrower and Borrower’s Books relating to any of the foregoing.

“Advance” or “Advances” means a cash advance or cash advances under the Revolving Line.

“Affiliate” means, with respect to any Person, any Person that owns or controls directly or indirectly such Person, any Person that controls or is controlled by or is under common control with such Person, and each of such Person’s senior executive officers, directors, and partners.

“Bank Expenses” means all reasonable costs or expenses (including reasonable attorneys’ fees and expenses, whether generated in-house or by outside counsel) incurred in connection with the preparation, negotiation, administration, and enforcement of the Loan Documents; reasonable Collateral audit fees; and Bank’s reasonable attorneys’ fees and expenses (whether generated in-house or by outside counsel) incurred in amending, enforcing or defending the Loan Documents (including fees and expenses of appeal), incurred before, during and after an Insolvency Proceeding, whether or not suit is brought.

“Borrower State” means Delaware, the state under whose laws Borrower is organized.

“Borrower’s Books” means all of Borrower’s books and records including: ledgers; records concerning Borrower’s assets or liabilities, the Collateral, business operations or financial condition; and all computer programs, or tape files, and the equipment, containing such information.

“Borrowing Base” means an amount equal to (i) 80% of Eligible Accounts and (ii) 35% of Eligible Inventory (provided, that Advances based upon Eligible Inventory shall not exceed $2,500,000) all as determined by Bank with reference to the most recent Borrowing Base Certificate delivered by Borrower.

“Business Day” means any day that is not a Saturday, Sunday, or other day on which banks in the State of California are authorized or required to close.

“Capitalized Expenditures” means current period cash expenditures that are amortized over a period of time in accordance with GAAP.

“Cash” means unrestricted cash and cash equivalents.

“Change in Control” shall mean a transaction in which any “person” or “group” (within the meaning of Section 13(d) and 14(d)(2) of the Securities Exchange Act of 1934) becomes the “beneficial owner” (as defined in Rule 13d-3 under the Securities Exchange Act of 1934), directly or indirectly, of a sufficient number of shares of all classes of stock then outstanding of Borrower ordinarily entitled to vote in the election of directors, empowering such “person” or “group” to elect a majority of the Board of Directors of Borrower, who did not have such power before such transaction.

“Chief Executive Office State” means California, where Borrower’s chief executive office is located.

“Closing Date” means the date of this Agreement.

“Code” means the California Uniform Commercial Code as amended or supplemented from time to time.

Exhibit A — Page 1

“Collateral” means the property described on Exhibit B attached hereto and all Negotiable Collateral, except to the extent any such property (i) is nonassignable by its terms without the consent of the licensor thereof or another party (but only to the extent such prohibition on transfer is enforceable under applicable law, including, without limitation, Sections 9406 and 9408 of the Code), (ii) the granting of a security interest therein is contrary to applicable law, provided that upon the cessation of any such restriction or prohibition, such property shall automatically become part of the Collateral or (iii) constitutes the capital stock of a controlled foreign corporation (as defined in the IRC), in excess of 65% of the voting power of all classes of capital stock of such controlled foreign corporations entitled to vote.

“Collateral State” means the state or states where the Collateral is located, which is California.

“Consolidated Net Income (or Deficit)” means the consolidated net income (or deficit) of any Person and its Subsidiaries, after deduction of all expenses, taxes, and other proper charges, determined in accordance with GAAP, after eliminating therefrom all extraordinary nonrecurring items of income.

“Contingent Obligation” means, as applied to any Person, any direct or indirect liability, contingent or otherwise, of that Person with respect to (i) any indebtedness, lease, dividend, letter of credit or other obligation of another, including, without limitation, any such obligation directly or indirectly guaranteed, endorsed, co-made or discounted or sold with recourse by that Person, or in respect of which that Person is otherwise directly or indirectly liable; (ii) any obligations with respect to undrawn letters of credit, corporate credit cards or merchant services issued for the account of that Person; and (iii) all obligations arising under any interest rate, currency or commodity swap agreement, interest rate cap agreement, interest rate collar agreement, or other agreement or arrangement designated to protect a Person against fluctuation in interest rates, currency exchange rates or commodity prices; provided, however, that the term “Contingent Obligation” shall not include endorsements for collection or deposit in the ordinary course of business. The amount of any Contingent Obligation shall be deemed to be an amount equal to the stated or determined amount of the primary obligation in respect of which such Contingent Obligation is made or, if not stated or determinable, the maximum reasonably anticipated liability in respect thereof as determined by such Person in good faith; provided, however, that such amount shall not in any event exceed the maximum amount of the obligations under the guarantee or other support arrangement.

“Credit Extension” means each Advance or any other extension of credit by Bank to or for the benefit of Borrower hereunder.

“Eligible Accounts” means those Accounts that arise in the ordinary course of Borrower’s business that comply with all of Borrower’s representations and warranties to Bank set forth in Section 5.3; provided that Bank may change the standards of eligibility after and based upon Bank’s review of an audit of Borrower, by giving Borrower 30 days prior written notice. Unless otherwise agreed to by Bank, Eligible Accounts shall not include the following:

(a)	Accounts that the account debtor has failed to pay in full within 90 days of invoice date;

(b)	Credit balances over 90 days;

(c)	Accounts with respect to an account debtor, 25% of whose Accounts the account debtor has failed to pay within 90 days of invoice date;

(d)

Accounts with respect to a single account debtor, including Subsidiaries and Affiliates, whose total obligations to Borrower exceed 20% of all Accounts (the “Concentration Limit”), to the extent such obligations exceed the aforementioned percentage, except as approved in writing by Bank; provided, however, that the Concentration Limit for Accounts where National Technology Leasing is the account debtor shall be 30%; and provided, further, that the Concentration Limit for Accounts where ▇▇▇▇▇ ▇▇▇▇▇▇, Inc., is the account debtor shall be 50%;

(e)	Accounts with respect to which the account debtor does not have its principal place of business in the United States, except for Eligible Foreign Accounts;

Exhibit A — Page 2

(f)	Accounts with respect to which the account debtor is the United States or any department, agency, or instrumentality of the United States;

(g)	Accounts with respect to which Borrower is liable to the account debtor for goods sold or services rendered by the account debtor to Borrower, but only to the extent of any amounts owing to the account debtor against amounts owed to Borrower;

(h)	Accounts with respect to which goods are placed on consignment, guaranteed sale, sale or return, sale on approval, ▇▇▇▇ and hold, demo or promotional, or other terms by reason of which the payment by the account debtor may be conditional;

(i)	Accounts with respect to which the account debtor is an officer, employee, agent or Affiliate of Borrower;

(j)	Accounts that have not yet been billed to the account debtor or that relate to deposits (such as good faith deposits) or other property of the account debtor held by Borrower for the performance of services or delivery of goods which Borrower has not yet performed or delivered;

(k)

Accounts with respect to which the account debtor disputes liability or makes any claim with respect thereto as to which Bank believes, in its sole discretion, that there may be a basis for dispute (but only to the extent of the amount subject to such dispute or claim), or is subject to any Insolvency Proceeding, or becomes insolvent, or goes out of business;

(l)	Accounts the collection of which Bank reasonably determines after inquiry and consultation with Borrower to be doubtful; and

(m)	Retentions and hold-backs.

“Eligible Foreign Accounts” means Accounts with respect to which the account debtor does not have its principal place of business in the United States and that are (i) supported by one or more letters of credit in an amount and of a tenor, and issued by a financial institution, acceptable to Bank, (ii) insured by the Export Import Bank of the United States or a third party insurer reasonably acceptable to Bank, or (iii) ▇▇▇▇▇ ▇▇▇▇▇▇ Canada. All Eligible Foreign Accounts must be calculated in U.S. Dollars.

“Eligible Inventory” means Borrower’s inventory consisting of raw materials and finished goods which are located in the United States.

“Environmental Laws” means all laws, rules, regulations, orders and the like issued by any federal state, local foreign or other governmental or quasi-governmental authority or any agency pertaining to the environment or to any hazardous materials or wastes, toxic substances, flammable, explosive or radioactive materials, asbestos or other similar materials.

“Equipment” means all present and future machinery, equipment, tenant improvements, furniture, fixtures, vehicles, tools, parts and attachments in which Borrower has any interest.

“ERISA” means the Employee Retirement Income Security Act of 1974, as amended, and the regulations thereunder.

“Event of Default” has the meaning assigned in Article 8.

“Excluded Equity” means any Voting Stock in excess of 66% of the total outstanding Voting Stock of any direct Subsidiary of Borrower that is a foreign Subsidiary. For purposes of this definition “Voting Stock” means as to any issuer, the issued and outstanding shares of each class of capital stock or other ownership interests of such issuer entitled to vote (within the meaning of Treasury Regulations §1.956-2(c)(2)).

Exhibit A — Page 3

“Foreign Exchange Sublimit” means a sublimit for foreign exchange contracts under the Revolving Line not to exceed $1,000,000.

“GAAP” means generally accepted accounting principles, consistently applied, as in effect from time to time.

“Indebtedness” means (a) all indebtedness for borrowed money or the deferred purchase price of property or services, including without limitation reimbursement and other obligations with respect to surety bonds and letters of credit, (b) all obligations evidenced by notes, bonds, debentures or similar instruments, (c) all capital lease obligations, (d) all Contingent Obligations, and (e) all obligations arising under the Foreign Exchange Sublimit, if any.

“Insolvency Proceeding” means any proceeding commenced by or against any Person or entity under any provision of the United States Bankruptcy Code, as amended, or under any other bankruptcy or insolvency law, including assignments for the benefit of creditors, formal or informal moratoria, compositions, extension generally with its creditors, or proceedings seeking reorganization, arrangement, or other relief.

“Inventory” means all present and future inventory in which Borrower has any interest.

“Investment” means any beneficial ownership of (including stock, partnership or limited liability company interest or other securities) any Person, or any loan, advance or capital contribution to any Person.

“IRC” means the Internal Revenue Code of 1986, as amended, and the regulations thereunder.

“Letter of Credit” means a commercial or standby letter of credit or similar undertaking issued by Bank at Borrower’s request in accordance with Section 2.1(b)(iii).

“Letter of Credit Sublimit” means a sublimit for Letters of Credit under the Revolving Line not to exceed $2,000,000.

“Lien” means any mortgage, lien, deed of trust, charge, pledge, security interest or other encumbrance.

“Liquidity” means the sum of Cash plus net trade Accounts.

“Loan Documents” means, collectively, this Agreement, any note or notes executed by Borrower, and any other document, instrument or agreement entered into in connection with this Agreement, all as amended or extended from time to time.

“Material Adverse Effect” means a material adverse effect on (i) the business operations or condition (financial or otherwise) of Borrower and its Subsidiaries taken as a whole, (ii) the ability of Borrower to repay the Obligations or otherwise perform its obligations under the Loan Documents, (iii) Borrower’s interest in, or the value, perfection or priority of Bank’s security interest in the Collateral.

“Negotiable Collateral” means all of Borrower’s present and future letters of credit of which it is a beneficiary, drafts, instruments (including promissory notes), securities, documents of title, and chattel paper, and Borrower’s Books relating to any of the foregoing.

“Non-Formula Advances” has the meaning assigned in Section 2.1(b)(i).

“Obligations” means all debt, principal, interest, Bank Expenses and other amounts owed to Bank by Borrower pursuant to this Agreement or any other agreement, whether absolute or contingent, due or to become due, now existing or hereafter arising, including any interest that accrues after the commencement of an Insolvency Proceeding and including any debt, liability, or obligation owing from Borrower to others that Bank may have obtained by assignment or otherwise.

Exhibit A — Page 4

“Periodic Payments” means all installments or similar recurring payments that Borrower may now or hereafter become obligated to pay to Bank pursuant to the terms and provisions of any instrument, or agreement now or hereafter in existence between Borrower and Bank.

“Permitted Indebtedness” means:

(a)	Indebtedness of Borrower in favor of Bank arising under this Agreement or any other Loan Document;

(b)	Indebtedness existing on the Closing Date and disclosed in the Schedule;

(c)

Indebtedness not to exceed $250,000 in the aggregate in any fiscal year of Borrower secured by a lien described in clause (c) of the defined term “Permitted Liens,” provided such Indebtedness does not exceed the lesser of the cost or fair market value of the equipment financed with such Indebtedness;

(d)	Subordinated Debt;

(e)	Indebtedness to trade creditors incurred in the ordinary course of business; and

(f)	Extensions, refinancings and renewals of any items of Permitted Indebtedness, provided that the principal amount is not increased or the terms modified to impose more burdensome terms upon Borrower or its Subsidiary, as the case may be.

“Permitted Investment” means:

(a)	Investments existing on the Closing Date disclosed in the Schedule or disclosed in Borrower’s financial statements filed with the Securities and Exchange Commission;

(b)

(i) Marketable direct obligations issued or unconditionally guaranteed by the United States of America or any agency or any State thereof maturing within one year from the date of acquisition thereof, (ii) commercial paper maturing no more than one year from the date of creation thereof and currently having a rating of at least A-2 or P-2 from either Standard & Poor’s Corporation or ▇▇▇▇▇’▇ Investors Service, (iii) Bank’s certificates of deposit maturing no more than one year from the date of investment therein, (iv) Bank’s money market accounts, (v) corporate notes maturing no more than one year from the date of creation thereof and currently having a rating of at least AA2 or AA, and (vi) auction rate securities currently having a rating of at least AA or Aaa;

(c)

Repurchases of stock from former employees or directors of Borrower under the terms of applicable repurchase agreements (i) in an aggregate amount not to exceed $250,000 in any fiscal year, provided that no Event of Default has occurred, is continuing or would exist after giving effect to the repurchases, or (ii) in any amount where the consideration for the repurchase is the cancellation of indebtedness owed by such former employees to Borrower regardless of whether an Event of Default exists;

(d)	Investments accepted in connection with Permitted Transfers;

(e)	Investments of Subsidiaries in or to other Subsidiaries or Borrower and Investments by Borrower in Subsidiaries not to exceed $250,000 in the aggregate in any fiscal year and intercompany transfers in the ordinary course of business between Subsidiaries and other Subsidiaries or Borrower;

(f)

Investments not to exceed $250,000 in the aggregate in any fiscal year consisting of (i) travel advances and employee relocation loans and other employee loans and advances in the ordinary course of business, and (ii) loans to employees, officers or directors relating to the purchase of equity securities of Borrower or its Subsidiaries pursuant to employee stock purchase plan agreements approved by Borrower’s Board of Directors;

Exhibit A — Page 5

(g)	Investments (including debt obligations) received in connection with the bankruptcy or reorganization of customers or suppliers and in settlement of delinquent obligations of, and other disputes with, customers or suppliers arising in the ordinary course of Borrower’s business;

(h)

Investments consisting of notes receivable from, prepaid royalties due from and other credit extensions to, licensees, customers and suppliers who are not Affiliates, in the ordinary course of business, provided that this subparagraph (h) shall not apply to Investments of Borrower in any Subsidiary; and

(i)

Joint ventures or strategic alliances in the ordinary course of Borrower’s business consisting of the exclusive or non-exclusive licensing of technology, the development of technology or the providing of technical support, provided that any cash Investments by Borrower do not exceed $250,000 in the aggregate in any fiscal year.

“Permitted Liens” means the following:

(a)	Any Liens existing on the Closing Date and disclosed in the Schedule (excluding Liens to be satisfied with the proceeds of the Advances) or arising under this Agreement or the other Loan Documents;

(b)	Liens for taxes, fees, assessments or other governmental charges or levies, either not delinquent or being contested in good faith by appropriate proceedings and for which Borrower maintains adequate reserves, provided the same have no priority over any of Bank’s security interests;

(c)

Liens not to exceed $250,000 in the aggregate (i) upon or in any Equipment acquired or held by Borrower or any of its Subsidiaries to secure the purchase price of such Equipment or indebtedness incurred solely for the purpose of financing the acquisition or lease of such Equipment, or (ii) existing on such Equipment at the time of its acquisition, provided that the Lien is confined solely to the property so acquired and improvements thereon, and the proceeds of such Equipment;

(d)

Liens incurred in connection with the extension, renewal or refinancing of the indebtedness secured by Liens of the type described in clauses (a) through (e) above, provided that any extension, renewal or replacement Lien shall be limited to the property encumbered by the existing Lien and the principal amount of the indebtedness being extended, renewed or refinanced does not increase; and

(e)	Liens arising from judgments, decrees or attachments in circumstances not constituting an Event of Default under Sections 8.5 or 8.9;

(f)	Non-exclusive licenses or sublicenses and (ii) exclusive licenses set forth on the Schedule granted in the ordinary course of Borrower’s business and, with respect to any licenses where Borrower is the license, any interest or title of a licensor or under any such license or sublicense;

(g)

Carriers’, warehousemen’s, mechanics’, materialmen’s, repairmen’s or other like Liens arising in the ordinary course of business which are not overdue for a period of more than 30 days or which are being contested in good faith and by appropriate proceedings if adequate reserves with respect thereto are maintained on the books of the applicable Person; and

(h)

deposits to secure the performance of bids, trade contracts (other than for borrowed money), contracts for the purchase of property, leases, statutory obligations, surety and appeal bonds, performance bonds and other obligations of a like nature, in each case, incurred in the ordinary course of business and not representing an obligation for borrowed money.

“Permitted Transfer” means the conveyance, sale, lease, transfer or disposition by Borrower or any Subsidiary of:

(a)	Inventory in the ordinary course of business;

Exhibit A — Page 6

(b)	licenses and similar arrangements for the use of the property of Borrower or its Subsidiaries in the ordinary course of business;

(c)	worn-out or obsolete Equipment not financed with the proceeds of Equipment Advances; or

(d)	other assets of Borrower or its Subsidiaries that do not in the aggregate exceed $250,000 during any fiscal year.

“Person” means any individual, sole proprietorship, partnership, limited liability company, joint venture, trust, unincorporated organization, association, corporation, institution, public benefit corporation, firm, joint stock company, estate, entity or governmental agency.

“Prime Rate” means the variable rate of interest, per annum, most recently announced by Bank, as its “prime rate,” whether or not such announced rate is the lowest rate available from Bank.

“Responsible Officer” means each of the Chief Executive Officer, the Chief Operating Officer, the Chief Financial Officer and the Controller of Borrower.

“Revolving Line” means a Credit Extension of up to $10,000,000 (inclusive of any amounts outstanding under the Letter of Credit Sublimit).

“Revolving Maturity Date” means September 28, 2008; provided, however, that, subject to Bank’s written approval, if no Default or Event of Default has occurred and is continuing, Borrower may, at the end of any Revolving Maturity Date, elect to extend such Revolving Maturity Date for one year.

“Schedule” means the schedule of exceptions attached hereto and approved by Bank, if any.

“SOS Reports” means the official reports from the Secretaries of State of each Collateral State, Chief Executive Office State and the Borrower State and other applicable federal, state or local government offices identifying all current security interests filed in the Collateral and Liens of record as of the date of such report.

“Subordinated Debt” means any debt incurred by Borrower that is subordinated in writing to the debt owing by Borrower to Bank on terms reasonably acceptable to Bank (and identified as being such by Borrower and Bank).

“Subsidiary” means any corporation, partnership or limited liability company or joint venture in which (i) any general partnership interest or (ii) more than 50% of the stock, limited liability company interest or joint venture of which by the terms thereof ordinary voting power to elect the Board of Directors, managers or trustees of the entity, at the time as of which any determination is being made, is owned by Borrower, either directly or through an Affiliate.

“Tangible Net Worth” means at any date as of which the amount thereof shall be determined, the total stockholders’ equity of Borrower and its Subsidiaries minus intangible assets, determined in accordance with GAAP.

“Total Liabilities” means at any date as of which the amount thereof shall be determined, all obligations that should, in accordance with GAAP be classified as liabilities on the consolidated balance sheet of Borrower, including in any event, to the extent not already included, all Indebtedness.

Exhibit A — Page 7


DEBTOR		BIOLASE TECHNOLOGY, INC.

SECURED PARTY:		COMERICA BANK

EXHIBIT B

COLLATERAL DESCRIPTION ATTACHMENT TO LOAN AND SECURITY AGREEMENT

All personal property of Debtor of every kind, whether presently existing or hereafter created or acquired, and wherever located, including but not limited to: (a) all accounts (including health-care-insurance receivables), chattel paper (including tangible and electronic chattel paper), deposit accounts, documents (including negotiable documents), equipment (including all accessions and additions thereto), general intangibles (including payment intangibles and software), goods (including fixtures), instruments (including promissory notes), inventory (including all goods held for sale or lease or to be furnished under a contract of service, and including returns and repossessions), investment property (including securities and securities entitlements), letter of credit rights, money, and all of Debtor’s books and records with respect to any of the foregoing, and the computers and equipment containing said books and records; and (b) any and all cash proceeds and/or noncash proceeds thereof, including, without limitation, insurance proceeds, and all supporting obligations and the security therefor or for any right to payment. All terms above have the meanings given to them in the California Uniform Commercial Code, as amended or supplemented from time to time.

Notwithstanding the foregoing, the Collateral shall not include any (i) Excluded Equity or (ii) copyrights, patents, trademarks, servicemarks and applications therefor, now owned or hereafter acquired, or any claims for damages by way of any past, present and future infringement of any of the foregoing (collectively, the “Intellectual Property”); provided, however, that the Collateral shall include all accounts and general intangibles that consist of rights to payment from the sale, licensing or disposition of all or any part of, or rights in, the Intellectual Property (the “Rights to Payment”). Notwithstanding the foregoing, if a judicial authority (including a U.S. Bankruptcy Court) holds that a security interest in the underlying Intellectual Property is necessary to have a security interest in the Rights to Payment, then the Collateral shall automatically, and effective as of September 28, 2006, include the Intellectual Property to the extent necessary to permit perfection of Bank’s security interest in the Rights to Payment.

Exhibit B — Page 1

LIBOR

Addendum To Loan and Security Agreement

This Addendum to Loan and Security Agreement (this “Addendum”) is entered into as of this 28^th day of September, 2006, by and between Comerica Bank (“Bank”) and BIOLASE Technology, Inc. (“Borrower”). This Addendum supplements the terms of the Loan and Security Agreement of even date herewith.

1.	Definitions.

a. Advance. As used herein, “Advance” means a borrowing requested by Borrower and made by Bank under the Note, including a LIBOR Option Advance and/or a Prime Rate Option Advance.

b. Business Day. As used herein, “Business Day” means any day except a Saturday, Sunday or any other day designated as a holiday under Federal or California statute or regulation.

c. LIBOR. As used herein, “LIBOR” means the rate per annum (rounded upward if necessary, to the nearest whole 1/8 of 1%) and determined pursuant to the following formula:


LIBOR =		Base LIBOR
LIBOR =		100% - LIBOR Reserve Percentage

(1)

“Base LIBOR” means the rate per annum determined by Bank at which deposits for the relevant LIBOR Period would be offered to Bank in the approximate amount of the relevant LIBOR Option Advance in the inter-bank LIBOR market selected by Bank, upon request of Bank at 10:00 a.m. California time, on the day that is the first day of such LIBOR Period.

(2)

“LIBOR Reserve Percentage” means the reserve percentage prescribed by the Board of Governors of the Federal Reserve System (or any successor) for “Eurocurrency Liabilities” (as defined in Regulation D of the Federal Reserve Board, as amended), adjusted by Bank for expected changes in such reserve percentage during the applicable LIBOR Period.

d. LIBOR Business Day. As used herein, “LIBOR Business Day” means a Business day on which dealings in Dollar deposits may be carried out in the interbank LIBOR market.

e. LIBOR Period. As used herein, “LIBOR Period” means, with respect to a LIBOR Option Advance:

(1)

initially, the period commencing on, as the case may be, the date the Advance is made or the date on which the Advance is converted to a LIBOR Option Advance, and continuing for, in every case, a period of 30, 60, 90 or 180 days thereafter so long as the LIBOR Option is quoted for such period in the applicable interbank LIBOR market, as such period is selected by Borrower in the notice of Advance as provided in the Note or in the notice of conversion as provided in this Addendum; and

(2)

thereafter, each period commencing on the last day of the next preceding LIBOR Period applicable to such LIBOR Option Advance and continuing for, in every case, a period of 30, 60, 90 or 180 days thereafter so long as the LIBOR Option is quoted for such period in the applicable interbank LIBOR market, as such period is selected by Borrower in the notice of continuation as provided in this Addendum.

f. Note. As used herein, “Note” means the Loan and Security Agreement of even date herewith by and between Bank and Borrower, as may be amended from time to time.

g. Regulation D. As used herein, “Regulation D” means Regulation D of the Board of Governors of the Federal Reserve System as amended or supplemented from time to time.

h. Regulatory Development. As used herein, “Regulatory Development” means any or all of the following: (i) any change in any law, regulation or interpretation thereof by any public authority (whether or not having the force of law); (ii) the application of any existing law, regulation or the interpretation thereof by any public authority (whether or not having the force of law); and (iii) compliance by Bank with any request or directive (whether or not having the force of law) of any public authority.

2. Interest Rate Options. Borrower shall have the following options regarding the interest rate to be paid by Borrower on Advances under the Note:

a. A rate equal to two and one half percent (2.50%) above Bank’s LIBOR, (the “LIBOR Option”), which LIBOR Option shall be in effect during the relevant LIBOR Period; or

b. A rate equal to one quarter of one percent (0.25%) above the “Prime Rate” as referenced in the Note and quoted from time to time by Bank as such rate may change from time to time (the “Prime Rate Option”).

-1-

3. LIBOR Option Advance. The minimum LIBOR Option Advance will not be less than Two Hundred Fifty Thousand and 00/100 Dollars ($250,000) for any LIBOR Option Advance.

4. Payment of Interest on LIBOR Option Advances. Interest on each LIBOR Option Advance shall be payable pursuant to the terms of the Note. Interest on such LIBOR Option Advance shall be computed on the basis of a 360-day year and shall be assessed for the actual number of days elapsed from the first day of the LIBOR Period applicable thereto but not including the last day thereof.

5. Bank’s Records Re: LIBOR Option Advances. With respect to each LIBOR Option Advance, Bank is hereby authorized to note the date, principal amount, interest rate and LIBOR Period applicable thereto and any payments made thereon on Bank’s books and records (either manually or by electronic entry) and/or on any schedule attached to the Note, which notations shall be prima facie evidence of the accuracy of the information noted.

6. Selection/Conversion of Interest Rate Options. At the time any Advance is requested under the Note and/or Borrower wishes to select the LIBOR Option for all or a portion of the outstanding principal balance of the Note, and at the end of each LIBOR Period, Borrower shall give Bank notice specifying (a) the interest rate option selected by Borrower; (b) the principal amount subject thereto; and (c) if the LIBOR Option is selected, the length of the applicable LIBOR Period. Any such notice may be given by telephone so long as, with respect to each LIBOR Option selected by Borrower, (i) Bank receives written confirmation from Borrower not later than three (3) LIBOR Business Days after such telephone notice is given; and (ii) such notice is given to Bank prior to 10:00 a.m., California time, on the first day of the LIBOR Period. For each LIBOR Option requested hereunder, Bank will quote the applicable fixed LIBOR Rate to Borrower at approximately 10:00 a.m., California time, on the first day of the LIBOR Period. If Borrower does not immediately accept the rate quoted by Bank, any subsequent acceptance by Borrower shall be subject to a redetermination of the rate by Bank; provided, however, that if Borrower fails to accept any such quotation given, then the quoted rate shall expire and Bank shall have no obligation to permit a LIBOR Option to be selected on such day. If no specific designation of interest is made at the time any Advance is requested under the Note or at the end of any LIBOR Period, Borrower shall be deemed to have selected the Prime Rate Option for such Advance or the principal amount to which such LIBOR Period applied. At any time the LIBOR Option is in effect, Borrower may, at the end of the applicable LIBOR Period, convert to the Prime Rate Option. At any time the Prime Rate Option is in effect, Borrower may convert to the LIBOR OPTION, and shall designate a LIBOR Period.

7. Default Interest Rate. From and after the maturity date of the Note, or such earlier date as all principal owing hereunder becomes due and payable by acceleration or otherwise, the outstanding principal balance of the Note shall bear interest until paid in full at an increased rate per annum (computed on the basis of a 360-day year, actual days elapsed) equal to five percent (5.00%) above the rate of interest from time to time applicable to the Note.

8. Prepayment. In the event that the LIBOR Option is the applicable interest rate for all or any part of the outstanding principal balance of the Note, and any payment or prepayment of any such outstanding principal balance of the Note shall occur on any day other than the last day of the applicable LIBOR Period (whether voluntarily, by acceleration, required payment, or otherwise), or if Borrower elects the LIBOR Option as the applicable interest rate for all or any part of the outstanding principal balance of the Note in accordance with the terms and conditions hereof, and, subsequent to such election, but prior to the commencement of the applicable LIBOR Period, Borrower revokes such election for any reason whatsoever, or if the applicable interest rate in respect of any outstanding principal balance of the Note hereunder shall be changed, for any reason whatsoever, from the LIBOR Option to the Prime Rate Option prior to the last day of the applicable LIBOR Period, or if Borrower shall fail to make any payment of principal or interest hereunder at any time that the LIBOR Option is the applicable interest rate hereunder in respect of such outstanding principal balance of the Note, Borrower shall reimburse Bank, on demand, for any resulting loss, cost or expense incurred by Bank as a result thereof, including, without limitation, any such loss, cost or expense incurred in obtaining, liquidating, employing or redeploying deposits from third parties. Such amount payable by Borrower to Bank may include, without limitation, an amount equal to the excess, if any, of (a) the amount of interest which would have accrued on the amount so prepaid, or not so borrowed, refunded or converted, for the period from the date of such prepayment or of such failure to borrow, refund or convert, through the last day of the relevant LIBOR Period, at the applicable rate of interest for such outstanding principal balance of the Note, as provided under this Note, over (b) the amount of interest (as reasonably determined by Bank) which would have accrued to Bank on such amount by placing such amount on deposit for a comparable period with leading banks in the interbank LIBOR market. Calculation of any amounts payable to Bank under this paragraph shall be made as though Bank shall have actually funded or committed to fund the relevant outstanding principal balance of the Note hereunder through the purchase of an underlying deposit in an amount equal to the amount of such outstanding principal balance of the Note and having a maturity comparable to the relevant LIBOR Period; provided, however, that Bank may fund the outstanding principal balance of the Note hereunder in any manner it deems fit and the foregoing assumptions shall be utilized only for the purpose of the calculation of amounts payable under this paragraph. Upon the written request of Borrower, Bank shall deliver to Borrower a certificate setting forth the basis for determining such losses, costs and expenses, which certificate shall be conclusively presumed correct, absent manifest error. Any prepayment hereunder shall also be accompanied by the payment of all accrued and unpaid interest on the amount so prepaid. Any outstanding principal balance of the Note which is bearing interest at such time at the Prime Rate Option may be prepaid without penalty or premium. Partial prepayments hereunder shall be applied to the installments hereunder in the inverse order of their maturities.

BY INITIALING BELOW, BORROWER ACKNOWLEDGE(S) AND AGREE(S) THAT: (A) THERE IS NO RIGHT TO PREPAY ANY LIBOR OPTION ADVANCE, IN WHOLE OR IN PART, WITHOUT PAYING

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THE PREPAYMENT AMOUNT SET FORTH HEREIN (“PREPAYMENT AMOUNT”), EXCEPT AS OTHERWISE REQUIRED UNDER APPLICABLE LAW; (B) BORROWER SHALL BE LIABLE FOR PAYMENT OF THE PREPAYMENT AMOUNT IF BANK EXERCISES ITS RIGHT TO ACCELERATE PAYMENT OF ANY LIBOR OPTION ADVANCE AS PART OR ALL OF THE OBLIGATIONS OWING UNDER THE NOTE, INCLUDING WITHOUT LIMITATION, ACCELERATION UNDER A DUE-ON-SALE PROVISION; (C) BORROWER WAIVES ANY RIGHTS UNDER SECTION 2954.10 OF THE CALIFORNIA CIVIL CODE OR ANY SUCCESSOR STATUTE; AND (D) BANK HAS MADE EACH LIBOR OPTION ADVANCE PURSUANT TO THE NOTE IN RELIANCE ON THESE AGREEMENTS.

BORROWER’S INITIALS

9. Hold Harmless and Indemnification. Borrower agrees to indemnify Bank and to hold Bank harmless from, and to reimburse Bank on demand for, all losses and expenses which Bank sustains or incurs as a result of (i) any payment of a LIBOR Option Advance prior to the last day of the applicable LIBOR Period for any reason, including, without limitation, termination of the Note, whether pursuant to this Addendum or the occurrence of an Event of Default; (ii) any termination of a LIBOR Period prior to the date it would otherwise end in accordance with this Addendum; or (iii) any failure by Borrower, for any reason, to borrow any portion of a LIBOR Option Advance.

10. Funding Losses. The indemnification and hold harmless provisions set forth in this Addendum shall include, without limitation, all losses and expenses arising from interest and fees that Bank pays to lenders of funds it obtains in order to fund the loans to Borrower on the basis of the LIBOR Option(s) and all losses incurred in liquidating or re-deploying deposits from which such funds were obtained and loss of profit for the period after termination. A written statement by Bank to Borrower of such losses and expenses shall be conclusive and binding, absent manifest error, for all purposes. This obligation shall survive the termination of this Addendum and the payment of the Note.

11. Regulatory Developments Or Other Circumstances Relating To Illegality or Impracticality of LIBOR. If any Regulatory Development or other circumstances relating to the interbank Euro-dollar markets shall, at any time, in Bank’s reasonable determination , make it unlawful or impractical for Bank to fund or maintain, during any LIBOR Period, to determine or charge interest rates based upon LIBOR, Bank shall give notice of such circumstances to Borrower and:

(i)

In the case of a LIBOR Period in progress, Borrower shall, if requested by Bank, promptly pay any interest which had accrued prior to such request and the date of such request shall be deemed to be the last day of the term of the LIBOR Period; and

(ii)

No LIBOR Period may be designated thereafter until Bank determines that such would be practical.

12. Additional Costs. Borrower shall pay to Bank from time to time, upon Bank’s request, such amounts as Bank determines are needed to compensate Bank for any costs it incurred which are attributable to Bank having made or maintained a LIBOR Option Advance or to Bank’s obligation to make a LIBOR Option Advance, or any reduction in any amount receivable by Bank hereunder with respect to any LIBOR Option or such obligation (such increases in costs and reductions in amounts receivable being herein called “Additional Costs”), resulting from any Regulatory Developments, which (i) change the basis of taxation of any amounts payable to Bank hereunder with respect to taxation of any amounts payable to Bank hereunder with respect to any LIBOR Option Advance (other than taxes imposed on the overall net income of Bank for any LIBOR Option Advance by the jurisdiction where Bank is headquartered or the jurisdiction where Bank extends the LIBOR Option Advance; (ii) impose or modify any reserve, special deposit, or similar requirements relating to any extensions of credit or other assets of, or any deposits with or other liabilities of, Bank (including any LIBOR Option Advance or any deposits referred to in the definition of LIBOR); or (iii) impose any other condition affecting this Addendum (or any of such extension of credit or liabilities). Bank shall notify Borrower of any event occurring after the date hereof which entitles Bank to compensation pursuant to this paragraph as promptly as practicable after it obtains knowledge thereof and determines to request such compensation. Determinations by Bank for purposes of this paragraph, shall be conclusive, provided that such determinations are made on a reasonable basis.

13. Legal Effect. Except as specifically modified hereby, all of the terms and conditions of the Note remain in full force and effect.

IN WITNESS WHEREOF, the parties have agreed to the foregoing as of the date first set forth above.


BIOLASE TECHNOLOGY, INC.						COMERICA BANK

By:						By:

Title:						Title:

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LOAN AND SECURITY AGREEMENT BIOLASE TECHNOLOGY, INC.

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