Nelie,
The coronoidectomy is a procedure that removes the coronoid process from the jaw. From what I read it can help people signigicantly, or not. At this point with my husband, surgery didn't sound good considering what he has gone through. The website for the other is ASTYM.com. I want to mention that at the office that my husband is going to, they have not used the Astym system yet and have had sustainable improvement. Friday when he got there he was at 12mm (double what he was when he started 2 weeks ago) and when they finished he was at 17mm. He is able to eat chunkier soups too. So do find out if there is a tmj physical therapist in your town and go see them first before committing to the surgery. Here is the link to the story I found: http://www.knoxnews.com/news/2008/feb/04/opening-innovative-physical-therapy-helps-keep-can
Good luck!