American Dental Partners, Inc. Announces Promotion of Chief Operating Officer.

Business/Technology Editors & Health/Medical Writers

WAKEFIELD, Mass.--(BW HealthWire)--Sept. 5, 2001

American Dental Partners, Inc. announced today the promotion of Michael J. Vaughan to the new position of Chief Operating Officer effective immediately.

Mr. Vaughan, who most recently served as Senior Vice President-Regional Operations, has been responsible for the Company's operations in Texas, Louisiana, Oklahoma and Arizona. Prior to joining the Company almost two years ago, Mike served as Regional Vice President - Southwest at Cardinal Health, Inc., a diversified pharmaceutical distribution company, where he was employed in a variety of operational roles from 1988 to 1999.

In his new role, Mr. Vaughan will be responsible for the day-to-day management of the Company's operations, including the achievement of the Company's financial and operational objectives. In particular, Mr. Vaughan will have primary responsibility for managing all regional operations executives, and the functional heads of information technology, human resources, market development and training. Mr. Vaughan will continue to report to Gregory A. Serrao, Chairman, President and CEO. This move simplifies the Company's organizational structure and will allow Mr. Serrao to focus on strategic growth initiatives. In addition to working directly with Mr. Vaughan, Mr. Serrao will continue to have direct reporting responsibility for finance, corporate development, business development and professional relations.

"I have worked with Mike for two years at the Company and for several years at Cardinal Health. He has always been and continues to be a strong operating executive with a great ability to focus on details and execution. In addition, Mike's working style is something that his professional colleagues find accessible and engaging, which will facilitate his new leadership role. Mike is a good mentor as well as a results- oriented professional. I am confident that Mike's skills will enable the Company to focus on operational execution, which is the core of our business," said Mr. Serrao. "This organizational change will enable me to devote more time to new business initiatives for the Company and assisting our affiliated dental groups achieve their growth plans," added Mr. Serrao.

"I am extremely excited about the prospects for our business and I look forward to taking advantage of the many opportunities we have in the operations area. I have a great regard for the management and affiliated dental groups at American Dental Partners and I am confident that we have the team in place to take the Company to the next level," said Mr. Vaughan.

American Dental Partners, Inc. is one of the nation's leading business partners to dental groups. The Company is affiliated with 19 dental groups and operates 154 dental facilities with more than 1,300 operatories located in 14 states.

Note: Some of the information in this press release contains "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. The words "believe," "expect," "hope," "anticipate," "project," and similar expressions, among others, identify forward-looking statements. Forward-looking statements speak only as of the date the statement was made. Such forward-looking statements are subject to uncertainties and other factors that could cause actual results to differ materially from those projected, anticipated or implied. Certain factors that might cause such a difference include, among others, risks associated with the tight labor market, access to and cost of capital, the Company's acquisition and affiliation strategy, management of rapid growth, dependence upon affiliated dental groups, dependence upon service agreements, government regulation of the dental industry and year 2000 compliance issues. Additional risks, uncertainties and other factors are set forth in the "Risk Factors" section of the Company's Registration Statement on Form S-4 (File No. 333-56941).