One of the methods of mandibular angle shaping is osteotomy (tangent osteotomy and mandibular angle shaping)
Osteotomy and mandibular angle shaping is to drill or slot with a ball drill first, and then cut the mandibular angle and mandibular outer plate with a thin osteotome, or directly cut the mandibular outer plate with Jigsaw, leaving cancellous bone and inner plate. Like the bone grinding method, the mandibular angle is not removed, and the original curvature of the mandible is retained, but the width of the mandibular angle is narrowed, and the side view is not improved much.
Advantages: the original mandibular radian is retained, which is suitable for people who want to reduce the mandibular width but want to retain the mandibular angle.
Disadvantages: limited improvement. Because the osteotome is used in the operation, violent operation may cause fracture, and the risk of inferior alveolar nerve injury also exists.
The second long curve mandibular angle shaping method
Long arc mandibular angle plastic surgery is to cut the mandibular angle with an arc saw, which widens the distance between the cutting line and the mandibular sulcus nerve and greatly improves the side view. Moreover, the masseter lost the attachment of the mandibular angle and slowly shrank, which also solved the problem of masseter hypertrophy. In order to shape the beautiful curve of the mandible, it is sometimes necessary to remove part of the bones at the outer edge of the mandible, and it needs to be coordinated with the curvature of the mandible.
Advantages: one-step cutting and one-step operation, less damage, short time and quick recovery. According to the aesthetics of mandibular angle radian, the risk of increasing the distance between the cutting line and the mandibular sulcus nerve is small, which accords with the stress principle of mandibular angle. Specially made mandibular angle instrument to solve the problems of outer plate and inner plate. The radian of mandibular angle conforms to aesthetics and has beautiful appearance. There is almost no need to polish after one cut.
Disadvantages: it is difficult to operate.
The third method of shaping mandibular angle: grinding bone to shape mandibular angle.
Bone grinding and mandibular angle shaping is to polish the mandibular angle and the cortical bone of the mandibular outer layer with a grinding head, without cutting the mandibular angle. Sometimes the mandibular angle can be ground off a little or raised slightly with a suitable grinding head, and the grinding thickness is limited, only 5~6mm at most, and the improvement effect is not obvious.
Advantages: simple and safe operation, less bleeding.
Disadvantages: limited effect. Suitable for people with moderate mandibular angle and wide mandibular angle from the front.