20 years of some tmj problem and deviate lower jaw but without any pain
I got hit from the left side in the jaw while box training about 20 years ago when my mouth was slightly open. Since then, my lower jaw has shifted to the right side more and more the wider I open my mouth. In all these years, I've never had any pain at all, except for the occasional clicking, popping, or grating sounds near my right ear when I open or close mouth or chew. I can open my mouth completely, but I try not to do so to avoid making the situation worse. I suspected it was a jaw problem and tried various exercises to correct and straighten my jaw, but nothing worked. However, I'm concerned that as I age, I might develop problems with this joint, and it will be too late to take conservative measures.
What to do with my condition? I'd appreciate any advice on the best course of action or whether I should just leave things as they are. A few times I tried to show and explain this to dentists and get some advice from them, but they didn't even bother to look into it. As If it's not a big deal at all.