I Need Braces to Fix my Uneven Bite but I Have Tmj. Will This Improve my Tmj or Make It Worse? (photo)

For the past few weeks i have had jaw pain,ear aches and headaches and my face has looked deformed/changed shape. I had 3 abscessed teeth which are now removed. I got an X-ray of my tm joints and said no abnormality but orthodontist said it was TMJ arthritis. I have to get braces as i have an overbite and 2 permanent teeth missing. Im getting the damon braces and there supposed to widen the jaw and as i have a very narrow jaw this might help. Will braces cure tmj or make it worse? HELP! (I'm 13)