I don't know how many, but:
176,063 = the total number of active dentists in the United States in 2004
226,835 = the total number of American dentists in 2004
81 percent = approximately the number of dentists in the general dentistry.
Turn to page 6 of the American dental association document published in 2006
Some business people sell sort lists, such as the journal of dental economics. Search it and you'll find their business department, where you can query the purchase list. It used to be Marvin ashworth, but he's probably retired now...
