Abbey Spanier Rodd & Abrams, LLP Files Class Action Lawsuit on Behalf of Purchasers of American Dental Partners, Inc. ...( NEW YORK Jan. 29 -- Abbey Spanie...),Health

NEW YORK, Jan. 29 /PRNewswire-USNewswire/ -- Abbey Spanier Rodd & Abrams, LLP announces that it has commenced a Class Action lawsuit in the United States District Court for the District of Massachusetts on behalf of a class (the "Class") of all persons who purchased or acquired securities of American Dental Partners, Inc. ("ADPI" or the "Company") (Nasdaq: ADPI) between August 10, 2005 and December 13, 2007 inclusive (the "Class Period").

For further information, please contact Nancy Kaboolian, Esq. toll-free at 1-800-889-3701, or by e-mail to nkaboolian@abbeyspanier.com.

ADPI is a leading provider of business services to multidisciplinary dental group practices in selected markets throughout the United States. Park Dental Group ("PDG") located in Minneapolis-St. Paul area, was one of the dental groups who had a long-term contract agreement with ADPI, and provided ADPI with significant revenue. Indeed, PDG accounted for 29 percent of ADPI's consolidated net revenue in 2006.

The business relationship between ADPI and PDG worked well for a number of years, but disputes arose in 2004. In February 2006, PDG sued ADPI and its subsidiary. On December 12, 2007, in connection with the lawsuit a jury found ADPI and/or its subsidiary liable for breach of contract, breach of implied covenants of good faith and fair dealing, breach of fiduciary duty, and tortious interference with contract and prospective advantage. The jury awarded PDG $88 million to compensate it for the injuries caused it by ADPI and its subsidiary and punitive damages of $42 million.

After the announcement of the jury verdict, ADPI's stock plummeted from $19.70 a share on December 11, 2007 to $14
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