Nuclear power has several functions: i. It can open the bite, and with the orthodontic appliance can bring the teeth back to the correct position. Second, to protect the teeth and avoid excessive wear caused by grinding. Many patients have the habit of grinding their teeth when they sleep, which will not only cause heavy wear on the teeth for a long time, but also cause discomfort in the joints, which can be protected by wearing jaw pads to protect the teeth and protect the joints. Third, the role of wearing jaw pads can change the state of occlusion and the balance of the two joints by adjusting the jaw pads. It is especially suitable for patients with temporomandibular joint disorder, and the disordered occlusal relationship can be corrected by jaw pads in the early stage, so that the joints can reach a balanced state and correct the temporomandibular joint disorder.