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Fred Joyal: Dentistry is a medical profession requiring 3 to 4 years of post graduate study and some licensing and some certification; usually by a State Board. There are over 150,000 dentists is the United States; including General Dentists, Orthodontists, Periodontists, and others.
Dentistry is the study and science of the teeth and the mouth. And it's important that you see a dentist as well as a physician to take care of your overall health. Your oral health and overall health are completely linked and it's important that a dental professional take care of your mouth.