Dear My Wife,
Good evening My name is Dani. It is very nice to meet you. I hope your wife can find a solution, and soon! That is a very very long time to be in pain and WORSE in her mouth!
I have to say after reading you post it sounds like an infection in the jaw bone. Has she ever had that possiblility checked? I think, just because she has gone through so much, and still doesnt have answers, I would try to get her to a Oral and maxillofacial surgeon. Theya re very skilled at finding causes and properly treating just these sort of things. They dont just do surgery, so if you can find one, it might be well worth your time.
Again, it was very nice to meet you.