Most of the skeletal rattles that occur when chewing food are due to disorders of the jaw joint. The mandibular joint is an articulated disc joint in the body, and the articular process of the mandible is set inside the articular depression of the temporal bone. The muscles of the face control the movement of the jaw joint, and when the muscles contract, the front of the jaw bone moves upward. When the mandible moves, the articular process only moves within the joint depression, and the area of contact between the articular process and the joint depression is not particularly large. Moreover, when the mandible moves, it not only opens and closes, but also moves slightly from side to side. Once there is a certain degree of mismatch between the articular protrusion and the articular depression during the opening and closing movement of the mandibular joint, it will cause the mandibular joint to rattle when a person opens and closes his or her mouth quickly or when the chewing force is too great.