The TMJ is a bilateral synovial joint between the mandibular condyle and the temporal bone glenoid fossa, separated by an articular disc that allows both hinge and translatory movements during jaw opening and chewing.
TMJ disorders affect 10–15% of the population, producing jaw pain, clicking, and limited opening. Disc displacement with reduction (clicking) is the most common presentation. Bruxism accelerates articular disc wear.
Anterior displacement of the articular disc producing a click on mouth opening as the condyle recaptures the disc, and pain with chewing or prolonged jaw use.
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