Many patients want to solve the jaw deformity, but at the same time, they are apprehensive about the risks of the surgery, so the question they often ask during the consultation is: What are the risks of the surgery? What is the percentage of risk? What are the most serious complications? I understand the psychological state of patients who want to have surgery but are afraid of failure, irreversible complications, and recurrence of postoperative deformities, but this is also the most difficult question for doctors to answer. I try to explain this problem from four aspects for the patients’ reference. First, on the issue of surgical death Any surgery will have risks, even the smallest surgery will have risks, such as postoperative wound infection, nerve damage, accidental fractures, etc., but the biggest risk than the sacrifice in surgery, which is not uncommon in the news reports, we know the super girl in a beauty medical institution for surgery problems death, surgery will also occur in the malignant hyperthermia death, etc. the chance of occurrence is very small Although these cases are rare, they still happen from time to time, and once they appear on the patient is 100%. However, you can find these problems often appear in some unregulated or small medical institutions, their anesthesia, surgery, nursing are certain problems, technical strength is difficult to deal with sudden accidents, the patient’s life is difficult to fully guarantee, for orthognathic surgery, indeed is not a small surgery, he anesthesia, surgical techniques, site conditions, nursing rehabilitation requirements are very high, if you in the above If you operate in a medical unit where the above conditions are not good enough, the incidence of accidents will be steeply increased and safety will not be easily guaranteed. However, this does not mean that there is no risk in large medical units, but the risk still exists, only the chance of occurrence has become smaller. The biggest complications of orthognathic surgery are bone necrosis, accidental fractures, nerve damage, etc. These complications are related to the doctor’s skills and experience, the less experienced the doctor, the more likely such problems, including postoperative respiratory emergencies caused by swelling is the most common, but in experienced units, can be very smoothly over this hurdle, some patients on such Some patients are not aware of such problems, and others imagine orthognathic surgery as easy, so they are not psychologically prepared for this type of complication, so it is recommended that you do not go to units that are inexperienced and have no guarantee of technical strength for surgery, and these information can be seen by patients through Internet sites to find out which units are doing well. The most common is the post-operative lower lip woodiness and hypoesthesia, which is mostly caused by the bones pulling the lower alveolar nerve nerve when splitting, and the percentage of occurrence is about 40%, and after the surgery, through the use of medication (Micropol), about six months after the surgery, 95% of the patients can fully recover, and only 5% of the patients’ The skin sensation is not fully restored and has no effect on the motor function of the face. If, due to poor surgical technique, the inferior alveolar nerve vascular bundle is messed up during the bone splitting, permanent lower lip numbness can occur. Other sequelae may be temporomandibular joint problems, orthognathic patients are mostly accompanied by joint symptoms before surgery, such as joint popping, pain, strangulation, etc. Most patients can be relieved or recovered after surgery, but there are some patients whose joint symptoms do not improve or are aggravated instead after surgery, which is due to the change in the position of the jaw bone after orthognathic surgery, the joint will need to adapt to the new position and gradually occur This is due to the fact that after orthognathic surgery, the position of the jaw bone is changed, and the joint needs to adapt to the new position and gradually undergoes reconstruction. There are also joint symptoms aggravated by the change of TMJ position due to the inaccurate fixation of the bone segment during surgery. Many patients worry about recurrence after surgery, and interpret recurrence as returning to the way it was before surgery, which is actually a misunderstanding. Most of the rebound of orthognathic surgery is caused by the pulling force of the muscles attached to the bones, which may cause a slight displacement of the original bones, the distance is often around 1-2mm, a small range, but this phenomenon is never a relapse. If a large skeletal displacement occurs, it is often the result of surgical technical factors. Generally speaking, the post-operative rebound is greater for anterior jaw migration than for receding jaw, for example, in patients with receding jaw. This is because although the bones move forward, the muscles attached to the bones will have a force that pulls the bones backward, making a mild rebound in the movement of the bones after surgery, and the greater the distance the bones move forward, the greater the tendency of the rebound, which of course requires post-operative orthodontic maintenance and protection Therefore, the better the combination of orthodontics and surgery, the less this phenomenon will occur.