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                                                                    EXHIBIT 99.1

                               ORTHALLIANCE, INC.
                THIS PROXY IS SOLICITED BY THE BOARD OF DIRECTORS
                     FOR THE SPECIAL MEETING OF STOCKHOLDERS
                     ON ______________________________, 2001

         The undersigned hereby appoints W. Dennis Summers and Paul H. Hayase
and each of them, with full power of substitution and resubstitution, as proxies
for and in the name of the undersigned, to vote all shares of Class A common
stock and Class B common stock of OrthAlliance, Inc. ("OrthAlliance") which the
undersigned would be entitled to vote if personally present at the special
meeting of stockholders to be held on ______________, 2001, at _______ __.m.,
(______________ time), at ______________________________________, or at any
adjournment thereof, upon the matters described in the accompanying Proxy
Statement/Prospectus, receipt of which is hereby acknowledged, and upon any
other business that may properly come before the meeting or any adjournment
thereof. Such proxies are directed to vote on the matters described in the Proxy
Statement/Prospectus as follows, and otherwise in their discretion upon such
other business as may properly come before the meeting or any adjournment
thereof.

         THE BOARD OF DIRECTORS RECOMMENDS A VOTE "FOR" THE PROPOSAL LISTED
BELOW.

                  1.       To approve and adopt the Agreement and Plan of
                           Merger, dated as of May 16, 2001, by and among
                           Orthodontic Centers of America, Inc., OCA Acquisition
                           Corporation, and OrthAlliance, Inc., which provides
                           for the merger of OCA Acquisition Corporation, a
                           wholly-owned subsidiary of Orthodontic Centers of
                           America, with and into OrthAlliance, with
                           OrthAlliance thereby becoming a wholly-owned
                           subsidiary of Orthodontic Centers of America as
                           described in the Proxy Statement/Prospectus dated
                           ______ ____, 2001:


                           [ ] FOR            [ ] AGAINST           [ ] ABSTAIN

                 (CONTINUED, AND TO BE SIGNED ON THE OTHER SIDE)