there are residencies available in Oral Medicine/Diagnosis. This training gives the dentists more understanding about systemic diseases that affect the oral caivty (i.e. Pemphigus Vulgaris, Bullous Pemphigoid, Lupus, etc.) The oral medicine specialist treats the oral conditions of these individuals. It is not an ADA recognized specialty. It seems interesting, however, most of the prgrams are 3 years, and the extra training will probably land you in an academic environment. There seems to be (SEEMS TO BE) not a big need for these kind of dentists in private practice. There is an American Academy of Oral Medicine website that publishes a list of residency programs and info. Can't remember the address. Sorry!