The operation of mandibular angle hypertrophy can be completed through intraoral incision, combined incision inside and outside the mouth and extraoral incision. Different incisions have their own advantages and disadvantages: there must be scars in the extraoral incision, which may damage the mandibular marginal branch of the facial nerve.

Complete external combined incision and external incision. Different incisions have their own advantages and disadvantages: there must be scars in the extraoral incision, which may damage the mandibular marginal branch of the facial nerve. The biggest advantage of oral approach and arc osteotomy in correcting mandibular angle is that there is no scar on the face. In addition, it also has the advantages of natural appearance and no damage to facial nerves. But it requires the performer to be skilled. The operation is safe, rapid and minimally invasive, which fully meets the requirements of minimally invasive surgery and has a rapid postoperative recovery. Now Zhang Xiaotian works in Shengjia New Hospital.