Hi Aussie99,
I have had TMJ for several years now. My latest dentist - a couple of years ago made me a prosthetic
occlusal splint to wear while asleep, made of a firm silicone substance. It was quite expensive but I got a lot back from Medibank Private Extras.
The splint made an incredible difference to the TMJ pain and even the clicking jaws. In fact the pain completely stopped after using the splint. It was only about three months ago that I got slack in using the splint and only yesterday I thought I must rehydrate the splint and start wearing it again as I'm feeling more discomfort each morning when I wake. So your post is a timely reminder!
However if you can get a prosthesis tailor made for you (is the best) I'm sure you will notice a huge improvement.

At least that is probably better than TN for which there may be no effective treatment!