BUSINESS COLLABORATION AGREEMENT

This BUSINESS COLLABORATION AGREEMENT (the "Agreement") is made and entered into as of this 17th day of April,
2001, by and amongMON ACQUISITION CORP., a Florida corporation ("Mon"), INTERDENT, INC., a
Delaware corporation ("InterDent"), andGENTLE DENTAL
SERVICE CORPORATION, a Washington corporation and wholly owned subsidiary of InterDent ("GDSC").

RECITALS

WHEREAS,
Mon, InterDent and GDSC have entered into that certain Purchase Agreement dated as of April 17, 2001 (the "Purchase
Agreement"), pursuant to which Mon has agreed to purchase the Assets and the Shares and has agreed to assume the Assumed Obligations.

WHEREAS,
prior to the date hereof, certain functions (the "Collective Functions") related to the operation of DCA and GDSC have been
and are conducted on a collective basis.

WHEREAS,
after the Closing Date, the parties hereto wish to continue to conduct the Collective Functions on a collective basis pursuant to and in accordance with the terms of this
Agreement.

NOW,
THEREFORE, in consideration of the mutual covenants contained herein, the parties agree as follows:

AGREEMENTS

1.Purpose of Agreement.After the Closing Date, pursuant to the terms hereof, the parties hereto agree
to continue to conduct the Collective Functions set forth in Section 5 hereof on a collective basis in order for each of the parties to benefit from conducting such functions on a national
level.

2.Purchase Agreement.Nothing contained herein shall be construed to affect the rights and obligations
of the parties under the Purchase Agreement. Notwithstanding anything contained herein to the contrary, Mon shall only assume the Assumed Obligations which are expressly set forth in the Purchase
Agreement and the Schedules thereto.

3.Definitions.Unless otherwise defined herein, capitalized terms used in this Agreement shall have
the meaning assigned to them in the Purchase Agreement.

4.Term and Termination.This Agreement shall commence after the close of business on the Closing Date
and shall remain in full force and effect until terminated (the "Term"). Any party hereto may terminate this Agreement at any time by delivering
60 days' written notice of termination to the other parties.

5.Collective Functions.



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6.Expenses.Each party hereto shall bear all of its own expenses relating to the execution of this
Agreement and the carrying out of its obligations pursuant hereto, unless such party agrees in writing to be responsible for any expenses incurred by another party.

7.Staffing.Notwithstanding anything contained in Section 5 hereof, each party hereto shall
only be required to perform its obligations under Section 5 to the extent that it is performing such activities on its own behalf and shall not be required to employ additional personnel to
perform its obligations under Section 5.

8.Compensation.No party shall be entitled to compensation for any actions taken or omitted pursuant
to the terms of this Agreement.

9.Authority and Exculpation.



10.Miscellaneous.



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

| |  | INTERDENT, INC.                                                
| |  | ---------------------------------------------------------------
| |  | By: /s/ MICHAEL T. FIOREName: Michael T. Fiore
Title: CEO      
| |  | GENTLE DENTAL SERVICE CORPORATION                              
| |  | By: /s/ MICHAEL T. FIOREName: Michael T. Fiore
Title: President
| |  | MON ACQUISITION CORP.                                          
| |  | By: /s/ STEVEN R. MATZKINDr. Steven Matzkin
President          

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