There are three common methods for shaping mandibular angle: bone cutting, bone grinding and resection+bone grinding. First, resection can remove the inner plate of the hypertrophic mandible and improve the crowd with obvious valgus and hypertrophy of mandibular angle. The face of beauty seekers has been greatly improved from the side, which is suitable for those who require perfect radian from the side, but have little improvement from the front. This method of bone grinding surgery is to let people who love beauty see the removed bones. Second, the bone grinding method uses a bone file to grind off the outer plate of the hypertrophic mandibular angle, and the amount of grinding is based on the experience of plastic surgeons. The positive effect of beauty seeker's face can be greatly improved after bone grinding surgery. Third, resection+bone grinding This bone grinding operation method perfectly combines two commonly used mandibular angle resection methods. 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 the bone, making the facial lines softer and smoother. This kind of bone grinding surgery not only takes care of the people who pursue positive curve, but also takes care of the curvature effect of the side. This method of bone grinding is slightly more complicated than the first two methods, but the effect is also the most perfect, suitable for all kinds of beauty seekers who want to change their faces.