I had my AN removed almost 2 years ago, July 6. Last October I started having problem with my jaw, it got hard to open my mouth, took ibuprofen for almost a month, lost of it, then I stopped it, then I got huge headaches and then became migraines, jaw problem lessened, but still there, then I went to see a neurologist he said it could be TMJ. I went to see a TMJ doctor, asked me to get a mouth piece called spacer, then two months later said I needed another for my upper teeth and later another one for the bottom again, I then realized he was trying to get my teeth straight which weren't that bad. When I told him that my only need was to get rid of the headaches and the jaw problems he said I should see a speech therapist to help me with my lips, then I realized he didn't know what he was talking about because I don't have issues with speech, it made me so angry I stopped going, then went to see another dentist who scraped my back teeth so they wouldn't grind and suggested I got a mouth guard. The bad thing is when I sleep I can't close my lips completely so the thickness of the mouth guard makes it worse so I gave up using it. The good thing is that the headaches went away and my jaw is better.
By reading some of the postings above I can tell that for me was also the neck. It gets messed up with stress and causes the jaw joint to get messed up.
My conclusion is that because I only chew on the opposite side of the AN, that joint overworks and gets messed up. I was told not to eat things that make me open my mouth too big, like hamburgers. Gum is a big no-no.
It is sad to see how some doctors don't know and we have to find out on our own, we know our bodies better than they do.