1.Night grinding will not affect the surgery. 2, intraoral approach to zygomatic bone reduction may lead to zygomatic cheek soft tissue sagging, which is related to a combination of factors such as the surgical method, the degree of reduction, age, and the size of the intraoperative peeling range. If you are young and the degree of reduction is not very large, you should try to reduce the stripping area and wear an elastic mask to compress and shape the cheek after surgery, so there will be no obvious tissue sagging. For those who are older and have sagging soft tissues in the cheeks before surgery, postoperative temporal cheek lift can solve the problem of sagging soft tissues very well. 3, cheek bone reduction and jaw angle osteotomy is a relatively mature and safe surgery, if the operation goes well, will not leave sequelae. 4, the surgery is carried out under general anesthesia, as the operator, of course, is responsible for the entire operation.