1. Mandibular plastic surgery is suitable for mandibular angle hypertrophy, valgus and valgus, and the face is "Chinese face" or "trapezoidal face".

2. Mandibular plastic surgery is suitable for mandibular angle protrusion and bilateral asymmetry.

3. Mandibular plastic surgery is suitable for the situation that the ratio of upper and lower width of the face is not harmonious and the distance between mandibular angles is wide.