Jaw plastic surgery is very strict and meticulous, which requires a series of guessing analysis and simulation surgery to determine the operation mode, osteotomy location, direction and interval of bone segment movement and occlusion relationship, so as to ensure the success of the operation. Before the operation, the lateral X-ray of skull should be taken. On this X-ray, the structure of skull and jaw, the relationship between teeth and jaw and the soft tissue of face should be measured, and the outline of skull, jaw, teeth and soft tissue of face should be outlined with cellophane. After paper-cutting and spelling, we can guess the position, interval and direction of cheekbone movement during the operation and the changes after the operation. It can also be modified according to the specific requirements of patients. At present, our hospital is advanced enough to make such a guess by computer, which has the advantages of high speed, high accuracy, easy modification, simple operation, convenient data access and application. Before the operation, it is necessary to take the membrane out of the patient's mouth to make a plaster model of the jaw teeth, and simulate the operation on this model. Intraoral incision is generally used during operation to avoid facial scar. According to the preoperative guess analysis and simulated operation, the position and direction of osteotomy were determined, the jaw was sawed off, the bone segment was moved to the predetermined position, and the bone segment was firmly fixed with mini titanium plate. You can eat liquid food with your mouth open on the day after operation, soft food after 2 weeks, and normal food after 6 weeks.

At present, jaw plastic surgery is technically mature, with reliable results and few serious complications.