According to relevant data, bone cutting is an operation to change the face shape by grinding the bone and cutting off part of the cheekbones. The correct name of facial osteotomy is maxillofacial bone surgery, which is divided into two categories according to whether occlusion correction is involved or not. Among them, it is necessary to change the occlusion of teeth and do orthodontics first, which is generally called orthognathic surgery. The other has nothing to do with occlusion, and it is called contour surgery. This operation does not need to remove any bone, but only needs to use professional grinding tools to thin the outer layer of mandibular angle bone, thus reducing the width.