What is a temporomandibular joint injury?
According to your reading “Temporomandibular Joint (TMJ) Syndrome,” temporomandibular joint injury “encompasses soft tissue damage to the supporting jaw musculature and internal derangement or arthrosis of the joint itself”.
Hand. “Temporomandibular Joint (TMJ) Syndrome.” In P. Deutsch and H. Sawyer (Ed.) A Guide to Rehabilitation. White Plains, NY: AHAB Press.