Locked Jaw: Many things can cause a jaw to lock. It can lock closed, or open. If it's locked closed, it's usually due to a displaced disc in the jaw joint. An MRI may be indicated, which would reveal the problem. If it's truly locked closed, muscle relaxants, nsaid's and perhaps splint therapy may be tried. However, surgery (tmj arthroscopy) is most effective at restoring full range of motion without pain....
Answered 5/11/2017
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