Yang Yang, Department of Stomatology, Beijing 301 Hospital: Pathogenic factors: 1, psychological factors Emotional tension is the most common pathogenic factor of teeth grinding. 2, the joint incongruity is considered another major factor in teeth grinding. 3, systemic factors Example: parasites, blood pressure and other systemic factors. 4.Occupation Jobs that require a high degree of precision have a tendency to develop bruxism. Hazards: The long contact time between upper and lower teeth and high force can cause damage to the tissues of the dentition, periodontium, temporomandibular joint and masticatory muscles. Treatment: 1, remove the causative factors, patients with tension should remove the psychological factors and local factors. 2.For severe and recalcitrant cases, a coincidental pad should be made. 3.Tuning and grinding of the occlusion. 4.Repair treatment. 5.Myoelectric feedback therapy. 6.Treatment of various complications caused by excessive wear and tear.