There is no maneuver to correct the mandible, the mandible is usually corrected by orthognathic surgery, which can be divided into two categories: mandibular angle osteotomy and mandibular angle plate amputation. 1. Mandibular angle osteotomy. Mandibular angle osteotomy is under the periosteum stripping the occlusal muscle attachment, exposure of the mandibular pool after the use of the term, according to the preoperative design of the mandibular angle of the whole layer of bone incision, peeling the mandibular angle will be removed. 2. Splitting of the outer plate of the mandibular angle. After stripping the biting muscle under the periosteum, the outer plate from the mandibular angle to the chin hole area is split and amputated from the middle and lower portion of the mandibular branch. For severe protruding mandibular angle, both surgeries can be performed at the same time, and zygomatic bone and zygomatic arch reduction with chinoplasty can be performed if necessary. Corrective surgery should be treated in a regular hospital.