The difference between bone cutting surgery and bone grinding surgery lies in different surgical operation, surgical principle, scope of application and side effects, but both surgeries have the function of improving facial shape. 1. Surgical operation: Bone cutting surgery is a surgery to eliminate zygomatic bone or zygomatic arch under general anesthesia by making an incision from inside the mouth, while bone grinding surgery is a surgery to grind a small part of the bone by making a small incision in the lower jaw of the human body under local anesthesia under the periosteum with the method of subperiosteal peeling. 2. Surgical principle: the principle of bone cutting surgery is to improve the facial angles, so that the angles are more obvious and the face is smooth, so as to significantly improve the face. The principle of bone resurfacing surgery is to remove part of the cheekbone of the face, so that the shape of the face will change, but the change of the shape of the face is smaller or not obvious. 3. Scope of application: Since bone reduction surgery has a greater impact on the change of face shape, bone cutting is suitable for people with large facial bones, more obvious bone thickening and higher cosmetic needs. Bone resurfacing surgery has a small effect on the change of facial shape and is usually applied to people with low cosmetic requirements. 4. Side effects: If bone-setting surgery is performed for a long time, it will make zygomatic bone, zygomatic arch and other structures too much grinding, which will easily lead to bone weakness and fracture. Bone grinding surgery has smaller incisions than bone cutting surgery, less bleeding and higher safety. However, both can lead to symptoms such as infection and tooth damage. Therefore, if there is no necessary need, it is not recommended that human beings improve the shape of their faces through bone grinding or bone cutting surgery. Even if you need surgery, you should go to a regular hospital for treatment.