I think you are talking about orthognathic surgery, that is, correcting skeletal deformities through surgery, including preoperative orthodontics, orthognathic surgery and postoperative orthodontics. It usually takes two to three years to treat, and the effect is obvious. As long as the effect is good at that time, there is no need for repeated plastic surgery. After the treatment, you will be given a retainer, which usually takes a long time, but it is detachable and will not affect the appearance too much. In addition, this kind of retainer requires all orthodontic patients to wear it after treatment, and adults need to wear it for a long time. As for the risk of surgery, this thing is hard to say. The first sentence is appendicitis surgery and dead people. The same is true of this kind of operation. There may be surgical accidents such as anesthesia accidents, which should be carefully considered before doing. However, as far as the current surgical situation at home and abroad is concerned, the occurrence of surgical accidents is very rare. This kind of operation is relatively mature, and it can be done in specialized hospitals affiliated to universities in many big cities.