Need doctor advice. where do i file/report a complaint for a us dentist online?

State dental society: Look up the state dental society (in your case mass) to determine the proper procedure to file a complaint. But before that, why don't you try to work things out with the dentist? In many cases, miscommunication leads to unhappy patients. All the best...

State Dental Board: I don't know the circumstances of your care, but if at all possible, i'd recommend you try to talk to the dentist before filing a report. Perhaps there was a simple misunderstanding, etc. Maybe a simple talk will make you happy and he or she can explain and speak about your concerns. However, if you've tried that already, or it's not satistactory to you, call the state dental board.