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SECOND AMENDMENT TO REGISTRATION RIGHTS AGREEMENT

    THIS SECOND AMENDMENT TO REGISTRATION RIGHTS AGREEMENT (the "Amendment"),
dated as of April 13, 2001, is made and entered into among INTERDENT, INC. ("the
Company"), the Requisite Holders and Union Bank of California, N.A., The Chase
Manhattan Bank, Bank of America, N.A., Citizens Bank of Massachusetts, First
National Bank, Fleet Capital Corporation, Sovereign Bank and U.S. Bank National
Association (collectively, the "Additional Holders").

    WHEREAS, the Company has entered into a Registration Rights Agreement dated
as of March 11, 1999 (the "Registration Rights Agreement"), pursuant to which
the Holders received registration rights with respect to certain securities of
the Company owned by the Holders; and

    WHEREAS, the Additional Holders desire to become parties to the Registration
Rights Agreement, as amended hereby.

    NOW, THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties agree as follows:

    1.  Capitalized terms used but not otherwise defined herein shall have the
meanings ascribed to such terms in the Registration Rights Agreement.

    2.  Pursuant to Section 19 thereof, the Registration Rights Agreement is
hereby amended as follows:

    (a) For all purposes of the Registration Rights Agreement, each Additional
Holder shall be considered a Holder and entitled to all rights and subject to
all obligations under the Registration Rights Agreement, as amended pursuant to
this Amendment.

    (b) Schedule I to the Registration Rights Agreement is hereby amended to add
at the end thereof, the following text:

Union Bank of California, N.A.
400 California St., 8th Floor
San Francisco, CA 94104
Attention: Nancy Perkins, Vice President
Telephone: (415) 765-2264
Telecopier: (415) 765-2170

The Chase Manhattan Bank
1166 Sixth Avenue, 16th Floor
New York, NY 10036
Attention: Eric Groberg, Vice President
Telephone: (212) 899-1297
Telecopier: (212) 899-2926

Bank of America, N.A.
South Coast Financial Center
675 Anton Blvd., 2nd Floor
Costa Mesa, CA 92626-7013
Attention: Ronald Parisi, Senior Vice President
Telephone: (714) 850-6590
Telecopier: (714) 850-6566

Citizens Financial Group, Inc.
53 State Street, 8th Floor
Boston, MA 02109

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Attention: Larry Jacobs, Vice President
Telephone: (617) 994-7144
Telecopier: (617) 742-9471

First National Bank
401 West "A" Street
San Diego, CA 92101
Attention: Daniel T. Grenci, Senior Vice President
Telephone: (619) 233-5588 ext. 1603
Telecopier: (619) 235-1266

Fleet Capital Corporation
15260 Ventura Blvd., Suite 400
Sherman Oaks, CA 91403-7899
Attention: Leslie Reuter, Senior Vice President
Telephone: (818) 382-4403
Telecopier: (818) 382-4291

Sovereign Bank
100 Pearl Street, 5th Floor
Hartford, CT 06103
Attention: Roland Lamothe
Telephone: (860) 757-3415
Telecopier: (860) 757-3450

U.S. Bank National Association
601 Second Avenue South
MPFP2516
Minneapolis, MN 55402-4302
Attention: Daniel Falstad, VP
Telephone: (612) 923-2176
Telecopier: (612) 923-2148

    3.  All other provisions of the Registration Rights Agreement shall remain
in full force and effect.

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    IN WITNESS WHEREOF, the parties have executed and delivered this Second
Amendment to Registration Rights Agreement as of the day and year first above
written.

    INTERDENT INC.
 
 
 
      By: /s/ MICHAEL T. FIORE

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Michael T. Fiore
Co-Chairman of the Board
and Chief Executive Officer
ADDITIONAL HOLDERS:
 
 
 
 
 
UNION BANK OF CALIFORNIA, N.A.
 
 
 
      By: /s/ THOMAS FRATAR

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    Name: Thomas Fratar

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    Title: Vice President

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THE CHASE MANHATTAN BANK
 
 
 
      By: /s/ ERIC GROBERG

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    Name: Eric Groberg

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    Title: Vice President

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BANK OF AMERICA, N.A.
 
 
 
      By: /s/ RONALD J. PARISI

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    Name: Ronald J. Parisi

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    Title: Sr. Vice President

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CITIZENS FINANCIAL GROUP, INC.
 
 
 
      By: /s/ LAWRENCE E. JACOBS

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    Name: Lawrence E. Jacobs

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    Title: Vice President

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FIRST NATIONAL BANK
 
 
 
      By: /s/ DANIEL T. GRENCY

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    Name: Daniel T. Grency

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    Title: CEO

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FLEET CAPITAL CORPORATION
 
 
 
      By: /s/ LESLIE REUTER

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    Name: Leslie Reuter

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    Title: Sr. Vice President

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SOVEREIGN BANK
 
 
 
      By: /s/ ROLAND D. LAMOTHE

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    Name: Roland D. Lamothe

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    Title: Vice President

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U.S. BANK NATIONAL ASSOCIATION
 
 
 
      By: /s/ DANIEL J. FALSTAD

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    Name: Daniel J. Falstad

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    Title: Vice President

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REQUISITE HOLDERS:
 
 
      J.P MORGAN PARTNERS (23A SBIC), LLC
 
 
By:
J.P. Morgan Partners (23A SBIC), Inc.
its Managing Member
 
 
 
      By: /s/ J.P. MORGAN PARTNERS

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    Name:   

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    Title:   

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SPROUT CAPITAL VII, L.P.
 
 
By:
DLJ Capital Corp.,
its Managing General Partner
 
 
 
      By: /s/ ROBERT FINZI

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Robert Finzi
Attorney in Fact
SPROUT GROWTH II, L.P.
 
 
 
 
 
By:
DLJ Capital Corp.,
its Managing Genberal Partner
 
 
 
      By: /s/ ROBERT FINZI

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Robert Finzi
Attorney in Fact
 
 
THE SPROUT CEO FUND, L.P.
 
 
By:
DLJ Capital Corp.,
its General Partner
 
 
 
      By: /s/ ROBERT FINZI

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Robert Finzi
Attorney in Fact
 
 
DLJ CAPITAL CORP.
 
 
 
      By: /s/ ROBERT FINZI

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Robert Finzi
Attorney in Fact
 
 
DLJ FIRST ESC L.L.C.
 
 
 
      By: /s/ ROBERT FINZI

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Robert Finzi
Attorney in Fact

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LEVINE LEICHTMAN CAPITAL PARTNERS II, L.P.
 
 
By:
Levine Leichtman Capital Partners, Inc.
 
 
 
      By: /s/ LEVINE LEICHTMAN CAPITAL PARTNERS, INC.

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    Name:   

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    Title:   

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SRM '93 Children's Trust
 
 
 
      By: /s/ MICHAEL T. FIORE

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    Name:   

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    Title:   

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      /s/ MICHAEL T. FIORE

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Michael T. Fiore
 
 
 
      /s/ DR. STEVEN R. MATZKIN

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Dr. Steven R. Matzkin
 
 
 
      /s/ L. THEODORE VAN EERDEN

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L. Theodore Van Eerden
 
 
 
      /s/ NORMAN R. HUFFAKER

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Norman R. Huffaker
 
 
 
      /s/ RANDY HENRY

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Randy Henry
 
 
 
      /s/ GRANT M. SADLER

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Grant M. Sadler
 
 
 
      /s/ DAVID P. NICHOLS

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David P. Nichols
 
 
 
      /s/ MITCHELL B. OLAN

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Mitchell B. Olan
 
 
 
      /s/ ROBERT FINZI

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Robert Finzi
 
 
 
      /s/ ERIC GREEN

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Eric Green
 
 
 
      /s/ PAUL H. KECKLEY

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Paul H. Keckley
 
 
 
      /s/ H. WAYNE POSEY

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H. Wayne Posey
 
 
 
      /s/ ROBERT F. RAUCCI

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Robert F. Raucci
 
 
 
      /s/ CURTIS LEE SMITH, JR.

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Curtis Lee Smith, Jr.

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SECOND AMENDMENT TO REGISTRATION RIGHTS AGREEMENT