If you live in America you should be concerned about dental fraud.
The only way to solve this is single payer health insurance.
The bottom line: get a second opinion and question everything when seeing the dentist.
The video below goes into more issues on dental fraud and what you should do to protect yourself.
beware of royal bank fraud they do not protect you if someone takes your cheques and signs a fake signature
you loose bank says too bad
ROYAL BANK OF CANADA FRAUD PROTECTION ZERO