Hello! I had lower jaw surgery 17 years ago for an overbite and cosmetic problem, and as a result, I haven t been able to open my mouth wide. I have lived with it, but now I am at a point where I want to do something about it. I am using retainers, but I am still grinding my teeth all the time... I have had extensive dental work as a result (crowns mostly). I am in a choir and this is affecting me tremendously. Is there something that can be done so that I am able to open my mouth wide open? When I try to open the lower jaw, my throat closes up. The problem seems to be at the hinges. Please, help!