Last weekend I had a crown on my upper left side pop out. Everything looked fine, and it was replaced Tuesday. This happened while I was in the middle of a pretty nasty TMJ flare up. Flash forward to today and a tooth I had a root canal on about 10 years ago has started to hurt (on the opposite side). It has never hurt before and I haven’t had any issues with it. My jaw and neck are hurting, and the old root canal tooth is sensitive to touch. My dentist did file down the crown on my left side and a few of my other teeth to relive my bite, could this be why my root canal tooth is hurting? Could it just pain associated with TMJ and the dental work made it worse? I feel like I’m going crazy.