The external incision method of mandibular angle plastic surgery is to make a skin incision 2-5cm long at the lower edge of mandibular angle under local anesthesia, then expose the masseter muscle and cut off the masticatory muscle. If there is hyperosteogeny of mandibular angle, it is necessary to cut the appropriate part of the mandible into an arc, then smooth it with a bone file and sew up the periosteum, muscle, subcutaneous and skin layer by layer.

The external incision method in mandibular angle plastic surgery is convenient and simple, and it is easy to expose the diseased tissue. The scar left by the incision will gradually fade after 6 months, and the cost is low, so this kind of mandibular angle plastic surgery is popular at present.

In addition, the mandibular angle hypertrophy was removed from the mouth. General tracheal intubation is used for general anesthesia. Except for the last molar in the mouth, the mucosa was cut to the periosteum of mandibular angle and divided into appropriate areas. After full exposure, the appropriate part of the mandibular horn bone was removed with a swing saw, and then the periosteum was restored and sutured, and then the mucosa was sutured. The advantage of this mandibular angle shaping technique is that it will not leave scars on the mandibular skin.