(1) Wearing the plane guide plate can move the maxillary appliance, and at the same time try to remove individual interdental interference and exercise the function of the lateral pterygoid muscle. When the habit of neutral occlusion has been basically completed, the plane guide plate will be changed into an inclined guide plate. After the contact of the posterior teeth is restored, the inclined guide plate will continue to be worn for a period of time after the mandibular angle is reshaped.

(2) Wear a non-functional plane occlusal pad type up-and-down movable appliance, and shape the mandibular angle with class II traction between jaws to improve the relationship between the maxilla and the mandible. In mandibular angle plastic surgery, the maxillary dental arch is narrow and the mandible is retracted;

The movable appliance with plane guide plate and arch expansion spring is used to adjust the strength to expand the upper dental arch. After the occlusion is balanced, the inclined guide plate can be used to guide the mandible forward to the normal position. Or use a fixed appliance. You can start eating after 48 hours, but you should first choose some liquid foods, such as milk, juice and broth. After 72 hours, you can start eating semi-liquid foods, such as egg soup and porridge. And you can eat normally after one week. During this period, we should pay attention to oral hygiene, because the incision of the operation is in the oral cavity, so we should ensure that we rinse our mouths in the morning, at noon and at night, maintain oral hygiene, and be careful not to eat spicy or hard food just after the operation, which is not conducive to the recovery of the operation and may also affect the effect of the operation.