What is TMJ Dislocation? | Symptoms | Causes | Treatment This video shows how to diagnose and treat a temporomandibular joint (TMJ) dislocation. A TMJ dislocation occurs when the condyle of the mandible moves out of its normal position in the glenoid fossa of the temporal bone and gets stuck in front of the articular eminence. This prevents the mouth from closing and causes pain and difficulty in speaking and swallowing. The video explains the causes, risk factors, symptoms, and complications of