It's very long and winding. My TMJ struggle was very long/painful. In early November I began feeling TMJ pain and mentioned it to my dentist and he said try not eat hard foods. Later I got terrible neck, jaw, facial pain and my tinnitus went very loud...Over night. Prior to this I have had mild tinnitus my whole life. I saw a TMJ specialist (dentist) who took a cone beam CT scan and said I had some degeneration of my condoyles, and disc displacement on both sides and would need a 2,ooo dollar mouth guard + appointments every 3-6 weeks. They promised me they could fix my aural fullness and tinnitus.
So I did that for a while before going to a University Hospital and Teaching Center where I was given an MRI and told to stop mouth guard immediately and do only physical therapy.
Annoyed by the contradictions, I ponied up the money and got an appointment with 4 oral and maxiofacial surgeons at the Mayo Clinic and a two day class on TMJ (education) and chronic pain.
At Mayo, (the top hospital in the World FWIW) they walked me through my MRI, showed me that while I had bone on bone in my jaw, they explained how it didn't matter. They explained to me how 30% of the population has this and it isn't correlated with any comorbid conditions. They then explained to me that, even though it's bone on bone, the body grows a new disc, so identical to the old one that surgeons can't tell during an autopsy or surgery if its the real or pseudo disc. I was given a book called "explain the pain". It was then suggested to me that I really focus on reframing my life around a wise exercise program (yoga, pilates etc) and reduce stress.
I asked the Mayo Clinic doctor about tinnitus, he responded "I was hoping you weren't going to ask". He said, " so many doctors promise they can fix TMJ related tinnitus but, honestly, no one knows exactly how or why it's linked to TMJ. It IS, but we don't know why. But what we do know is that the your muscles, your nerves, and your Jaw are very closely linked to your ear, and that the more you can reduce swelling, pain, and improve oral habits and develop good posture the more likely your tinnitus will reduce".
Sorry for the wall of text. I hope that helps some.