Temporomandibular joint disorder (TMJ) is a common jaw condition in the United States. Between 5% and 12% of people in the United States have TMJ, and it is more common in younger people, particularly women (Source: NIDCR).In children, a common jaw condition is a birth defect known as cleft palate. Malocclusion (misalignment) of the teeth is a common cause of jaw problems in children and adults. Impacted wisdom teeth, periodontal disease, and jaw clenching are common causes of jaw problems in mi