Of course, medical surgery can help you shrink your jawbone. This operation is suitable for the transitional protrusion of chin hypertrophy. If there is no occlusal disorder, the methods can be chin plastic surgery such as chin osteotomy, partial chin resection and chin eradication. The osteotomy line and range were designed on X-ray film before operation. Since it can be simplified, let's look at the operation flow: 1. Incision stripping and jaw lengthening. 2. Pull the jaw out of the incision after peeling, and accurately mark the osteotomy line and the range of cutting off part of the chin according to the designed osteotomy range before operation. The highest point of the osteotomy line should be below 5 mm below the root tip of the lower tooth. There are several ways. 3. Oblique osteotomy after jaw osteotomy: Make a mark five millimeters below the apex of the left and right canine teeth and one millimeter below the mental nerve foramen on both sides. It is necessary to connect the four points with methylene blue, mark the first osteotomy line by extending to the mandibular margin on both sides, and then design the second osteotomy line according to the number of retreats required before operation. This line is parallel to the first line. Between the two osteotomy lines is the bone piece to be cut off. After osteotomy, it was fixed with mini-steel plate. Use a grinding head to grind the middle part of the chin and the edges of both sides of the chin flat and smooth. Horizontal osteotomy: fix a point 5 ~ 8mm below the cusp of the left and right canine teeth, and connect the two points with methylene blue as a line perpendicular to the midline. Set a point in front of bilateral mental holes 1 mm, make an upper alveolar edge at each of these two points, and set a vertical line of mandibular edge, and extend the connecting line below the two canines to both sides until it intersects with the vertical line in front of mental holes. This is the horizontal horseshoe osteotomy line. According to the quasi-osteotomy width designed before operation, mark another vertical osteotomy line parallel to it in front of the vertical line in front of the mental hole, and the upper end will stop at the parallel osteotomy line below the vertex, and the mandibular margin will be lowered. The interval between the two vertical lines is equal to the length of quasi-retraction, and the bone block between the two vertical lines will be removed. After the chin is retracted in place, it is fixed with a mini steel plate. After the chin retreats, the nodules of the chin can be stepped and uneven and need to be polished with a grinding head. All the above methods can reduce the jaw bone, which shows that the jaw bone can still be reduced.