I am getting ready to send my wedding invitations off to the calligrapher and am not sure how we are to address a guest (married) who is a dentist. I know that if a person is an M.D. then you use the title "Dr." with their name. Is it the same for dentists since they are called Dr. in the workplance and are doctors of dentistry? Or do you put "D.D.S" at the end or nothing at all? What is the etiquette here? Thank you.