I dont know of any medical or dental school anyone could get into without a degree in the sciences
Four years college and taking the D cats and four years of dental school at which point providing you make the grade you get a doctorate in dental medicine
Dentists are doctors, they treat a specific part of your body.....A dentist with a DMD trains on the entire body, last I looked your head is suppose to be attached to the rest of your body
Dentists can also be Board certified just like any other medical doctor and the two dentists here can correct me if im wrong, the boards are given pretty much the same way medical boards are given, tests and reviews questions by there peers