UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934
                               (Amendment No. 7)*

                      ORTHODONTIC CENTERS OF AMERICA, INC.
                                (Name of Issuer)

                          Common Stock, $.01 par value
                         (Title of Class of Securities)

                                   68750P 10 3
                                 (CUSIP Number)

                                       N/A
             (Date of Event which Requires filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

|_| Rule 13d-1(b)
|x| Rule 13d-1(c)
|_| Rule 13d-1(d)

* The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).



CUSIP No. 68750P 10 3

--------------------------------------------------------------------------------
1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

     Thomas W. Smith
--------------------------------------------------------------------------------
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

                                                                 (a)  |_|
                                                                 (b)  |X|
--------------------------------------------------------------------------------
3.   SEC USE ONLY


--------------------------------------------------------------------------------
4.   CITIZENSHIP OR PLACE OF ORGANIZATION

      United States
--------------------------------------------------------------------------------
  NUMBER OF    5.   SOLE VOTING POWER

   SHARES           2,176,120
               -----------------------------------------------------------------
BENEFICIALLY   6.   SHARED VOTING POWER

  OWNED BY          5,250,700
               -----------------------------------------------------------------
    EACH       7.   SOLE DISPOSITIVE POWER

  REPORTING         2,976,170
               -----------------------------------------------------------------
   PERSON      8.   SHARED DISPOSITIVE POWER

    WITH            5,250,700
--------------------------------------------------------------------------------
9.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     8,226,870
--------------------------------------------------------------------------------
10.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

     Not Applicable                                                     |_|
--------------------------------------------------------------------------------
11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

     16.4%
--------------------------------------------------------------------------------
12.  TYPE OF REPORTING PERSON*

     IN
--------------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!


                                       -2-


CUSIP No. 68750P 10 3

--------------------------------------------------------------------------------
1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

     Thomas N. Tryforos
--------------------------------------------------------------------------------
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

                                                                 (a)  |_|
                                                                 (b)  |X|
--------------------------------------------------------------------------------
3.   SEC USE ONLY


--------------------------------------------------------------------------------
4.   CITIZENSHIP OR PLACE OF ORGANIZATION

      United States
--------------------------------------------------------------------------------
  NUMBER OF    5.   SOLE VOTING POWER

   SHARES                   0
               -----------------------------------------------------------------
BENEFICIALLY   6.   SHARED VOTING POWER

  OWNED BY          5,150,700
               -----------------------------------------------------------------
    EACH       7.   SOLE DISPOSITIVE POWER

  REPORTING            13,069
               -----------------------------------------------------------------
   PERSON      8.   SHARED DISPOSITIVE POWER

    WITH            5,150,700
--------------------------------------------------------------------------------
9.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     5,163,769
--------------------------------------------------------------------------------
10.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

     Not Applicable                                                     |_|
--------------------------------------------------------------------------------
11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

     10.3%
--------------------------------------------------------------------------------
12.  TYPE OF REPORTING PERSON*

     IN
--------------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!


                                      -3-



CUSIP No. 68750P 10 3

--------------------------------------------------------------------------------
1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

     Scott J. Vassalluzzo
--------------------------------------------------------------------------------
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

                                                                 (a)  |_|
                                                                 (b)  |X|
--------------------------------------------------------------------------------
3.   SEC USE ONLY


--------------------------------------------------------------------------------
4.   CITIZENSHIP OR PLACE OF ORGANIZATION

      United States
--------------------------------------------------------------------------------
  NUMBER OF    5.   SOLE VOTING POWER

   SHARES              17,000
               -----------------------------------------------------------------
BENEFICIALLY   6.   SHARED VOTING POWER

  OWNED BY          5,150,700
               -----------------------------------------------------------------
    EACH       7.   SOLE DISPOSITIVE POWER

  REPORTING            99,000
               -----------------------------------------------------------------
   PERSON      8.   SHARED DISPOSITIVE POWER

    WITH            5,150,700
--------------------------------------------------------------------------------
9.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     5,249,700
--------------------------------------------------------------------------------
10.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

     Not Applicable                                                     |_|
--------------------------------------------------------------------------------
11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

     10.5%
--------------------------------------------------------------------------------
12.  TYPE OF REPORTING PERSON*

     IN
--------------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!


                                      -4-


CUSIP No. 68750P 10 3

--------------------------------------------------------------------------------
1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

     Daniel J. Englander
--------------------------------------------------------------------------------
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

                                                                 (a)  |_|
                                                                 (b)  |X|
--------------------------------------------------------------------------------
3.   SEC USE ONLY


--------------------------------------------------------------------------------
4.   CITIZENSHIP OR PLACE OF ORGANIZATION

      United States
--------------------------------------------------------------------------------
  NUMBER OF    5.   SOLE VOTING POWER

   SHARES              26,200
               -----------------------------------------------------------------
BENEFICIALLY   6.   SHARED VOTING POWER

  OWNED BY            100,000
               -----------------------------------------------------------------
    EACH       7.   SOLE DISPOSITIVE POWER

  REPORTING            26,200
               -----------------------------------------------------------------
   PERSON      8.   SHARED DISPOSITIVE POWER

    WITH              100,000
--------------------------------------------------------------------------------
9.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     126,200
--------------------------------------------------------------------------------
10.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

     Not Applicable                                                     |_|
--------------------------------------------------------------------------------
11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

     0.2%
--------------------------------------------------------------------------------
12.  TYPE OF REPORTING PERSON*

     IN
--------------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!


                                      -5-


Explanatory Note:

            This Amendment No. 7 ("Amendment") to the joint filing on Schedule
13G made by Thomas W. Smith, Thomas N. Tryforos and Scott J. Vassalluzzo with
the Securities and Exchange Commission (the "Original Schedule 13G") relating to
the common stock, par value $.01 per share ("Common Stock") of Orthodontic
Centers of America, Inc., a Delaware corporation, is being filed to add Daniel
J. Englander as a joint filer. Mr. Englander is joining this filing on a
voluntary basis and disclaims membership in any "group" for purposes of Section
13(d)(3) of the Securities Exchange Act of 1934, as amended, or for any other
purpose.


ITEM 1. (a) Name of Issuer:

            Orthodontic Centers of America, Inc.

        (b) Address of Issuer's Principal Executive Offices:

            3850 North Causeway Boulevard
            Suite 800
            Metairie, LA  70002

ITEM 2. (a) Name of Person Filing:

            (i)      Thomas W. Smith

            (ii)     Thomas N. Tryforos

            (iii)    Scott J. Vassalluzzo

            (iv)     Daniel J. Englander

            The filing of this Statement shall not be deemed to be an admission
            that the filing persons comprise a "group" within the meaning of
            Section 13(d)(3) of the Securities Exchange Act of 1934, as amended.
            The Reporting Persons each disclaim beneficial ownership of the
            shares reported in this Schedule 13G in excess of those shares as to
            which they have or share voting or investment authority.

        (b) Address of Principal Business Office:

            The following is the address of the principal business office of
            each of the filing persons:

            323 Railroad Avenue
            Greenwich, CT  06830

       (c)  Citizenship:


                                      -6-


            Each of Messrs. Thomas W. Smith, Thomas N. Tryforos, Scott J.
            Vassalluzzo and Daniel J. Englander is a United States citizen.

        (d) Title of Class of Securities:

            Common Stock, par value $.01 per share.

        (e) CUSIP Number:

            68750P 10 3

ITEM 3. If this Statement is filed pursuant to Rules 13d-1(b) or 13d-2(b) or
        (c), check whether the person filing is a:

        Not applicable.

        If this Statement is filed pursuant to Rule 13d-1(c), check this box |x|

ITEM 4. Ownership

        (a) Thomas W. Smith - 8,226,870 shares; Thomas N. Tryforos -
            5,163,769 shares; Scott J. Vassalluzzo - 5,249,700 shares; Daniel J.
            Englander - 126,200 shares

        (b) Thomas W. Smith - 16.4%; Thomas N. Tryforos - 10.3%; Scott J.
            Vassalluzzo - 10.5%; Daniel J. Englander - 0.2%

        (c) Messrs. Smith, Tryforos, Vassalluzzo and Englander have the sole
            power to vote or to direct the vote of 2,176,120, 0, 17,000 and
            26,200 shares of Common Stock, respectively, and to dispose or to
            direct the disposition of 2,976,170, 13,069, 99,000 and 20,200
            shares of Common Stock, respectively. Messrs. Smith, Tryforos and
            Vassalluzzo share the power to vote or to direct the vote of and to
            dispose or to direct the disposition of 5,150,700 shares and Messrs.
            Smith and Englander share the power to vote or to direct the vote of
            and to dispose or to direct the disposition 100,000 shares. Voting
            and investment authority over investment accounts established for
            the benefit of certain family members and friends of the Reporting
            Persons is subject to each beneficiary's right to terminate or
            otherwise direct the disposition of the investment account.


ITEM 5. Ownership of Five Percent or Less of a Class

        Not applicable.

ITEM 6. Ownership of More than Five Percent on Behalf of Another Person

        Messrs. Smith, Tryforos and Vassalluzzo in the aggregate beneficially
        own 6,221,939 shares in their capacities as investment managers for
        certain managed accounts. The managed accounts have the right to receive
        dividends from, and the proceeds from the sale of, the managed accounts'
        shares.


                                      -7-


ITEM 7. Identification and Classification of the Subsidiary Which Acquired the
        Security Being Reported on By the Parent Holding Company

        Not applicable.

ITEM 8. Identification and Classification of Members of the Group

        Not applicable.

ITEM 9. Notice of Dissolution of Group

        Not applicable.

ITEM 10. Certification

        By signing below, I certify that, to the best of my knowledge and
        belief, the securities referred to above were not acquired and are not
        held for the purpose of or with the effect of changing or influencing
        the control of the issuer of the securities and were not acquired and
        are not held in connection with or as a participant in any transaction
        having that purpose or effect.


                                      -8-


                                   Signature

      After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.

Date: May 17, 2004

                                         /s/ Thomas W. Smith
                                     ----------------------------
                                            Thomas W. Smith


                                        /s/ Thomas N. Tryforos
                                     ----------------------------
                                          Thomas N. Tryforos


                                        /s/ Scott J. Vassalluzzo
                                     ----------------------------
                                          Scott J. Vassalluzzo


                                        /s/ Daniel J. Englander
                                     ----------------------------
                                          Daniel J. Englander


                                      -9-


                             JOINT FILING AGREEMENT

         The undersigned agree that the foregoing Statement on Schedule 13G,
dated May 13, 2004, is being filed with the Securities and Exchange Commission
on behalf of each of the undersigned pursuant to Rule 13d-1(k)

Dated: May 17, 2004

                                              /s/ Thomas W. Smith
                                        -----------------------------
                                                Thomas W. Smith


                                            /s/ Thomas N. Tryforos
                                        -----------------------------
                                              Thomas N. Tryforos


                                            /s/ Scott J. Vassalluzzo
                                        -----------------------------
                                              Scott J. Vassalluzzo


                                            /s/ Daniel J. Englander
                                        -----------------------------
                                              Daniel J. Englander


                                      -10-