Temporomandibular
joint (TMJ) syndrome, also known as myofacial
pain dysfunction, is a disorder in the joint between the mandible (lower
jaw bone) and the temporal
bone of the skull. Symptoms include blurred vision, sinus problems, and pain in the jaw, head, neck, shoulders, and ears. Possible causes are arthritis, malocclusion (bad bite), bruxism (grinding or clenching of teeth), muscle tension, and psychological stress. Treatment ranges from jaw exercises and drug therapy to dental procedures and, in severe cases, surgery. It is estimated that nearly 25 percent of the U.S. population suffers from some form of TMJ syndrome, although most
cases are not treated.
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