I've had TMJ for a while and for the past several months, tinnitus.
I know that mine is correlated to TMJ. I read on a website that tinnitus or hearing loss can be the result of severe TMJ. I would say treat TMJ first either way.
I wasn't certain for a while w/ the tinnitus and had some very daunting suicidal thoughts for a while. Now I'm more certain though and have since focused on treating the TMJ. (I'm now 45% less suicidal)jkjk