What is an endodontic dentist? What do they do? By going to an endodontic dentist does dental treatment cost more then going to your family dentist? My sister has to see an endodontic but she does not even know why since she never asks any questions and just does what her dentist tells her to do. However afterwords is always upset because she does not know what is going on and why her dentist can not just do the work.