Alveolar bone protrusion and bad occlusion of teeth lead to oral protrusion, which can not be closed normally, greatly affecting the appearance. Modern people's pursuit of beauty can be said to be almost perfect. It can be said that modern plastic surgery has fundamentally changed people's appearance. Correcting teeth can change the face and mouth shape. Jaw deformities can be divided into three types: ① Anterior and backward deformities, such as maxillary protrusion, mandibular protrusion, maxillary retraction and mandibular retraction; ② Vertical deformity, such as long face deformity and short face deformity; ③ Left-right asymmetry deformity, such as mandibular deviation. Surgical orthodontics is suitable for patients aged between 18-60 who have symptoms such as crowded teeth, mandibular locking, alveolar cleft, malocclusion and mandibular opening, and the jaw deformity is serious. Surgical orthodontics is a problem of perfectly correcting jaw deformities by recombining facial skeletal positions according to the ideal facial structural relationship and proportion designed in advance. This technique is minimally invasive to open alveolar bone and directly adjust the relationship between teeth and jaw. Because alveolar bone has the characteristics of cancellous bone, good blood supply, fast healing and no joint marks after healing, compared with traditional orthodontic surgery, opening supporting bone (dense bone, poor blood supply, slow healing and joint marks after healing) has less risk and better effect. Surgical orthodontics will change the face shape, make the lateral line of nose-lip chin more natural and standard, and make the face look more vivid. Because buck teeth will cause the mouth to protrude, after correction, the chin will look backward and the nose will be relatively high.

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