Bone grinding method: use bone file to grind off the hypertrophy of mandibular angle outer plate, and the amount of grinding depends on the doctor's experience. After mandibular angle protrusion plastic surgery, the positive effect of customer's face can be greatly improved.

Removal method: it can remove the inner plate of hypertrophic mandible and improve the crowd with obvious valgus and hypertrophy of mandibular angle. The customer's face has been greatly improved from the side, which is suitable for those who need perfect curvature from the side, but have little improvement from the front. In this way, the patient can see the removed bone.

Zhang Xiaotian of Sheng Jiaxin also pointed out the method of resection and bone grinding: this surgical method perfectly combines two commonly used methods of mandibular angle resection. On the one hand, it can remove the hypertrophic mandible, and at the same time, it can smooth the edges and corners after osteotomy by grinding bones, so that the facial lines are softer and smoother. This plastic method of mandibular angle protrusion not only takes care of the people who pursue the front curve, but also takes care of the curvature effect of the side. This method is slightly more complicated than the first two methods, but the effect is also the most perfect, suitable for all kinds of customers who want to change their faces.