Temporomandibular Joint (TMJ) Syndrome (Temporomandibular Joint Disorder)
TMJ Syndrome Overview
Temporomandibular joint (TMJ) syndrome is pain in the jaw joint that can be caused by a variety of medical problems. The TMJ connects the lower jaw (mandible) to the skull (temporal bone) in front of the ear. Certain facial muscles control chewing. Problems in this area can cause head and neck pain, facial pain, ear pain, headaches, a jaw that is locked in position or difficult to open, problems biting, and jaw clicking or popping sounds when you bite. Temporomandibular joint syndrome is also referred to as temporomandibular joint disorder.
The TMJ is comprised of muscles, blood vessels, nerves, and bones. You have two TMJs, one on each side of your jaw.
Muscles involved in chewing (mastication) also open and close the mouth. The jawbone itself, controlled by the TMJ, has two movements: rotation or hinge action, which is opening and closing of the mouth, and gliding action, a movement that allows the mouth to open wider. The coordination of this action also allows you to talk, chew, and yawn.
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