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The temporomandibular joint connects the lower jaw to the temporal bone of the skull and is responsible for bringing the lower and upper jaws together. It is one of the most frequently used joints in the body. Depending on the underlying cause, jaw pain can occur suddenly or build up over time.
Symptoms & Signs. The jaw joint, medically referred to as the temporomandibular joint or TMJ, is made up of the bone below the mouth (the mandible, commonly referred to as the jawbone) and the bone just above the mouth (the maxilla). The TMJ allows the upper jaw to close on the lower jaw and is one of the most frequently used joints of the body. The temporomandibular joints are complex structures containing muscles, tendons, and bones. Injury to or disorders of these structures can all result in pain in the jaw area.