You're right if you think that there has been a dramatic increase in the size of dental practices.
Waldman
H B
HB
D003749:Dental Facilities / Q000706:statistics & numerical data / Q000639:trends; D003797:Dental Staff / Q000191:economics / Q000706:statistics & numerical data* / Q000639:trends; D011215:Practice Management, Dental / Q000191:economics / Q000706:statistics & numerical data* / Q000639:trends; D012456:Salaries and Fringe Benefits / Q000706:statistics & numerical data; D014481:United States; D000078329:Workforce