Bone grinding surgery is not a major operation for plastic surgeons, and it is not difficult to do. In a process, it is difficult to be skilled, calm and stable, to explain before operation, to match surgical instruments properly, and to deal with emergencies during operation. Generally speaking, mandibular angle surgery is easy to do, and the more you do, the more difficult it is, but the more you experience, the more you will experience. The cost of bone grinding surgery is about 30-60 thousand yuan.