Orthognathic surgery involves certain risks. Orthognathic surgery is performed to correct dental and facial deformities such as misalignment of the teeth, buck teeth, or “bunions”. Orthognathic surgery involves fracturing and realigning the jaws of the patient, so it carries a certain amount of risk. Orthognathic surgery can lead to alveolar nerve damage, postoperative bleeding and hematoma, postoperative infection and other risks. However, alveolar nerve damage will recover gradually, most patients with postoperative bleeding hematoma will absorb it on their own, and the incidence of postoperative infection is around 3%. There may be rebound phenomenon after orthognathic surgery, which is usually caused by skeletal muscle tension, and the position of the rebound bone is usually displaced by about 1 millimeter, with a small range. Orthognathic surgery must be performed in a standardized medical institution, and postoperative care is also required.