- Email: [email protected]
EDITORIAL POLICY
Look for the ADA Seal of Acceptance
THE JOURNAL OF THE AMERICAN DENTAL ASSOCIATION
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PUBLISHER
Laura A. Kosden ASSOCIATE PUBLISHER, EDITORIAL James H. Berry
EDITORIAL DIRECTOR Lisbeth R. Maxwell EDITORIAL COORDINATOR Anita M. Mark PROJECT EDITOR
Janice Snider ASSOCIATE PUBLISHER, MARKETING AND OPERATIONS
Gabriela Radulescu ADVERTISING SALES MANAGER Duane Billek DIRECTOR OF PRODUCTION
Beth Cox ART DIRECTOR
Peter Solarz LAYOUT AND DESIGN Susan Chauvet, David Buehrens, Kimberly Meyers MARKETING MANACGER Jill Philbin
CLASSIFIED ADVERTISING Shirley Hawkins CIRCULATION CUSTOMER SERVICE REPRESENTATIVE Eric D. Claiborne
REPRINTSIPERMISSIONS Jan Rizzo
.Sheila M. Cassella, proofreader; Barbara .Collier, manuscripts; Jan Rizzo, book reviews and letters to the editor.
SUBSCRIPTION INFORMATION
as your assurance
ACCEPTED American Dental e
that a product meets ADA guidelines for safety and effectiveness.
EDITORIAL POLICY
All statements of opinion and of supposed fact are published under the authority of the authors, including editorials, letters and book reviews. They are not to be accepted as the views of the American Dental Association or its subsidiaries unless such statements have been expressly adopted by the Association. Articles are accepted with the understanding that they have not been published previously and that they are submitted solely to The Journal. Information on any products mentioned may be available from the authors. Neither the American Dental Association nor any of its subsidiaries has any financial interest in any products mentioned in editorial content, and The Journal requires all authors to disclose any financial or other interests they may have in products or services described in their articles. ADVERTISING POLICY
All matters pertaining to advertising should be addressed to Duane Billek, advertising sales manager, Advertising Sales Department, ADA Publishing Co., Inc., 211 E. Chicago Ave., Chicago, 11. 60611, 1-312440-2740, fax 1-312-440-2550. Sales Offices: Bud McKeon, National Sales Manager, 350 Plymouth Drive, Suite 200, Inverness, Ill. 60067, 1-847-934-9047, fax 1-847-705-7936. East: Vmcent J. Lagana, 170 Bay Road, Suite 2200, Huntington, N.Y 11743, 1-516-3853288, fax 1-516-385-1744. Central: Robert J. Greco, Hilltop Executive Center, 1580 S. Milwaukee Ave., Suite 404, Libertyville, Ill. 60048, 1-847-522-7560, fax 1-847-522-7564. West: Audrey Jehorek, 8 Hexham, Irvine, Calif. 92612, 1-714-854-8022, fax 1-714-8548023. All advertising appearing in ADA publications must comply with official published advertising standards of the American Dental Association. The publication of an advertisement is not to be construed as an endorsement or approval by the American Dental Association or any of its subsidiaries, councils, commissions, or bureaus of the product or service being offered in the advertisement unless the advertisement specifically includes an authorized statement that such approval or endorsement has been granted. A copy of the advertising standards of the American Dental Association is available on request. PERMISSIONS POLICY Authorization to photocopy material for internal or personal use of specific clients and for educational or classroom use is granted by ADA Publishing Co., Inc., provided that the appropriate fee is paid directly to the Copyright Clearance Center, 222 Rosewood Drive, Danvers, Mass. 01923, U.S.A. 1-508-750-8400; fax 1508-750-4470. Contact ADA Publishing Co., Inc., directly to order reprints or to request authorization to photocopy material for advertising or promotional purposes, for creating new collective works, or for resale. For inquiries regarding reprints and permissions, contact Jan Rizzo at 1-312-440-4671. The Journal is indexed or abstracted in the following: Index to Dental Literature, Index Medicus, MEDLARS, BIOSIS Database, Chemical Abstracts, University Microfilms, Dental Abstracts and Current Contents: Clinical Medicine. The American Dental Association holds the copyright for articles published in The Journal. Request reprint permission from ADA Publishing Co., Inc.
Nonmember subscrption iquiries and requests for back issues should be addressed to Subscription Department, ADA Publishing Co., Inc., 1-312-440-2867. Association members should address all inquiries to Department of Membership, American Dental Association, 1-312440-2614. The Joural of the American Dental Association, JADA (ISSN 0002-8177), is published monthly by ADA Publishing Co., Inc., 211 E. Chicago Ave., Chicago, Ill. 60611, phone 1-312-440-2785, fax 1-3124403538. Printed in USA. Periodical postage paid at Chicago and at additional mailing office. Subsciption for members $25 (dues allocation). Nonmember subscription rates: United States, U.S. possessions and Mexico-individual, $90; institution, $110 peryear. Forign-individual $115; insitution, $140 peryear. Canada-indvidual, $100; instition $125 per year. Single copy rates: United States, $10; outside U.S., $17. Airmail delivery to U.S. territories, Canada and Mexio $25 a year, foreign $100 a year. Copyright 1997 American Dental Association. All rights reserved Postmaster: send addres changes to e Journal oftheAmerican Dental Association Co. Ltd. 3-10, Ni(JADA), 211 E. ChicagoAve., Chicago, Ill. 60611 one month before the effective date of change. For all Japanese subscription orders, please contact Mar Dn honbashi 2-Chome, Chuo-ku, bokyo 103 Japan. Available on CD-ROM (1990-1995 issues). ADA Headquarters: The central telephone number is 1-312 440-2500. The ADA's toll-free phone number can be found on the back of your membership card. ADA ONLINE Internet address httpJ .adaorg". BPA Member Business Publications Audit. Cover illustration by Peter Solarz
260 JADA, Vol. 128, March 1997
THE JOURNAL OF THE AMERICAN DENTAL ASSOCIATION
qJ
\D)A
A
DD
Ale
L Association
PUBLISHER
Laura A. Kosden ASSOCIATE PUBLISHER, EDITORIAL James H. Berry
EDITORIAL DIRECTOR Lisbeth R. Maxwell EDITORIAL COORDINATOR Anita M. Mark PROJECT EDITOR
Janice Snider ASSOCIATE PUBLISHER, MARKETING AND OPERATIONS
Gabriela Radulescu ADVERTISING SALES MANAGER Duane Billek DIRECTOR OF PRODUCTION
Beth Cox ART DIRECTOR
Peter Solarz LAYOUT AND DESIGN Susan Chauvet, David Buehrens, Kimberly Meyers MARKETING MANACGER Jill Philbin
CLASSIFIED ADVERTISING Shirley Hawkins CIRCULATION CUSTOMER SERVICE REPRESENTATIVE Eric D. Claiborne
REPRINTSIPERMISSIONS Jan Rizzo
.Sheila M. Cassella, proofreader; Barbara .Collier, manuscripts; Jan Rizzo, book reviews and letters to the editor.
SUBSCRIPTION INFORMATION
as your assurance
ACCEPTED American Dental e
that a product meets ADA guidelines for safety and effectiveness.
EDITORIAL POLICY
All statements of opinion and of supposed fact are published under the authority of the authors, including editorials, letters and book reviews. They are not to be accepted as the views of the American Dental Association or its subsidiaries unless such statements have been expressly adopted by the Association. Articles are accepted with the understanding that they have not been published previously and that they are submitted solely to The Journal. Information on any products mentioned may be available from the authors. Neither the American Dental Association nor any of its subsidiaries has any financial interest in any products mentioned in editorial content, and The Journal requires all authors to disclose any financial or other interests they may have in products or services described in their articles. ADVERTISING POLICY
All matters pertaining to advertising should be addressed to Duane Billek, advertising sales manager, Advertising Sales Department, ADA Publishing Co., Inc., 211 E. Chicago Ave., Chicago, 11. 60611, 1-312440-2740, fax 1-312-440-2550. Sales Offices: Bud McKeon, National Sales Manager, 350 Plymouth Drive, Suite 200, Inverness, Ill. 60067, 1-847-934-9047, fax 1-847-705-7936. East: Vmcent J. Lagana, 170 Bay Road, Suite 2200, Huntington, N.Y 11743, 1-516-3853288, fax 1-516-385-1744. Central: Robert J. Greco, Hilltop Executive Center, 1580 S. Milwaukee Ave., Suite 404, Libertyville, Ill. 60048, 1-847-522-7560, fax 1-847-522-7564. West: Audrey Jehorek, 8 Hexham, Irvine, Calif. 92612, 1-714-854-8022, fax 1-714-8548023. All advertising appearing in ADA publications must comply with official published advertising standards of the American Dental Association. The publication of an advertisement is not to be construed as an endorsement or approval by the American Dental Association or any of its subsidiaries, councils, commissions, or bureaus of the product or service being offered in the advertisement unless the advertisement specifically includes an authorized statement that such approval or endorsement has been granted. A copy of the advertising standards of the American Dental Association is available on request. PERMISSIONS POLICY Authorization to photocopy material for internal or personal use of specific clients and for educational or classroom use is granted by ADA Publishing Co., Inc., provided that the appropriate fee is paid directly to the Copyright Clearance Center, 222 Rosewood Drive, Danvers, Mass. 01923, U.S.A. 1-508-750-8400; fax 1508-750-4470. Contact ADA Publishing Co., Inc., directly to order reprints or to request authorization to photocopy material for advertising or promotional purposes, for creating new collective works, or for resale. For inquiries regarding reprints and permissions, contact Jan Rizzo at 1-312-440-4671. The Journal is indexed or abstracted in the following: Index to Dental Literature, Index Medicus, MEDLARS, BIOSIS Database, Chemical Abstracts, University Microfilms, Dental Abstracts and Current Contents: Clinical Medicine. The American Dental Association holds the copyright for articles published in The Journal. Request reprint permission from ADA Publishing Co., Inc.
Nonmember subscrption iquiries and requests for back issues should be addressed to Subscription Department, ADA Publishing Co., Inc., 1-312-440-2867. Association members should address all inquiries to Department of Membership, American Dental Association, 1-312440-2614. The Joural of the American Dental Association, JADA (ISSN 0002-8177), is published monthly by ADA Publishing Co., Inc., 211 E. Chicago Ave., Chicago, Ill. 60611, phone 1-312-440-2785, fax 1-3124403538. Printed in USA. Periodical postage paid at Chicago and at additional mailing office. Subsciption for members $25 (dues allocation). Nonmember subscription rates: United States, U.S. possessions and Mexico-individual, $90; institution, $110 peryear. Forign-individual $115; insitution, $140 peryear. Canada-indvidual, $100; instition $125 per year. Single copy rates: United States, $10; outside U.S., $17. Airmail delivery to U.S. territories, Canada and Mexio $25 a year, foreign $100 a year. Copyright 1997 American Dental Association. All rights reserved Postmaster: send addres changes to e Journal oftheAmerican Dental Association Co. Ltd. 3-10, Ni(JADA), 211 E. ChicagoAve., Chicago, Ill. 60611 one month before the effective date of change. For all Japanese subscription orders, please contact Mar Dn honbashi 2-Chome, Chuo-ku, bokyo 103 Japan. Available on CD-ROM (1990-1995 issues). ADA Headquarters: The central telephone number is 1-312 440-2500. The ADA's toll-free phone number can be found on the back of your membership card. ADA ONLINE Internet address httpJ .adaorg". BPA Member Business Publications Audit. Cover illustration by Peter Solarz
260 JADA, Vol. 128, March 1997