How can I get Medicare or medacaid to pay for dental work if my teeth damage was caused from my anorexia nervosa / bulimia ?

I've had an abscess since Nov (wasn't covered at that time) now my lower right gum line is black one tooth has a hole and the back is gone which led to the next tooth to decay and chip which is cutting my tongue my right front tooth is chipped and is affecting the tooth beside it causing a gap the left front tooth starting to get affected because of rat front tooth left front tooth broke off leaving only a tiny speck in gum which affected tooth beside that causing a hole in the side of the tooth