Hello. There are several types of faces suitable for mandibular angle plastic surgery: 1. Features of a round face: short face (that is, short chin), wide face but smooth lines, no prominent edges and corners. Operation method: bone grinding operation. This kind of operation does not need to remove any bone, but only needs to use professional grinding tools to thin the outer layer of mandibular angle bone, thus reducing the width. The thickness that can be ground off is limited, only 5 to 6 mm at most. Advantages of operation: simple technique, light injury and quick recovery. Difficulties in operation: the improvement effect is effective, and it is only applicable to the face with less obvious edges and corners and only needs a little adjustment. Two: square face characteristics: short face, not wide but strong lines, strong sense of bones, short chin and slightly upturned tip. Surgical method: mandibular angle splitting operation. This operation is to remove the external bone of the mandibular angle without removing the whole mandibular angle. Advantages of surgery: People with this face shape will not have a wide face, and often only the back of the chin protrudes. By cutting off part of the mandibular angle, the width is reduced and the original facial curvature is preserved. Difficulties in operation: high risk, bleeding needs to be controlled, and people with poor coagulation function, anemia and facial hemangioma are not suitable for this method. Three: the characteristics of the square face: it is a typical face of China people, with a wide face and strong lines, and the mandibular angle even protrudes backward, giving people the impression that the masticatory muscles are particularly developed. Surgical method: Mandibular angle resection. This operation is to completely remove the mandibular angle, but it should be noted that the arc of the incision must match the chin. Advantages of the operation: the range of change is obvious, and the mandibular arch can be reconstructed; Without the support of bones, the masticatory muscles will slowly shrink, and the problem of masticatory muscle hypertrophy will be solved. Operation difficulty: high technical difficulty and great danger; To cut the marrow cavity, it is necessary to control bleeding and screen the operators.