1, mandibular angle grinding and plastic surgery. This operation is to remove the cortical bone of mandibular angle and mandibular outer layer by grinding head, and the mandibular angle is not removed. Sometimes the mandibular angle can be cut off a little or raised slightly by using a suitable grinding head, and the grinding thickness is limited, only 5~6mm at most, and the improvement effect is not obvious.

2, osteotomy mandibular angle plastic or tangent osteotomy mandibular angle plastic. This kind of operation is to drill or slot with a ball drill first, then cut off the mandibular angle and mandibular outer plate with a fine bone knife, or directly cut off the mandibular outer plate with a wire saw, leaving cancellous bone and inner plate. Like the bone grinding method, the mandibular angle is not removed, and the original curvature of the mandible is retained, but the width of the mandibular angle is narrowed, and the side view is not improved much.

3. Long curve mandibular angle shaping. In this operation, an arc saw osteotomy was used to cut the mandibular angle, which widened the distance between the cutting line and the mandibular sulcus nerve and greatly improved the side view. Moreover, the masseter lost the attachment of the mandibular angle and slowly shrank, which also solved the problem of masseter hypertrophy. In order to shape the beautiful curve of the mandible, it is sometimes necessary to remove part of the bones at the outer edge of the mandible, and it needs to be coordinated with the curvature of the mandible.