Cracks or fractures of the teeth are the most common result of teeth grinding. When this happens, the tooth’s outer surface, enamel, is worn away, and the dentin underneath it is revealed. As a result, the teeth become more sensitive to pressure and temperature changes. The temporomandibular joint (TMJ) can also be damaged by bruxism. The lower jaw bone attaches to the skull at the joint on either side of the mouth. Prolonged jaw clenching can disrupt the normal gliding and mechanics of the joint, causing TMJ dysfunction. Untreated bruxism may lead to problems with the jaw muscles and joints. Losing teeth is a possibility as well.