1, mouth opening difficulty: This is the most serious complication when mandibular angle is reduced and part of masseter muscle is removed, and most of them disappear about one week after mandibular angle plastic surgery. Try to avoid opening your mouth and other actions.

2. Hematoma: Hematoma can occur when large blood vessels are damaged during mandibular angle plastic surgery, or the dressing pressure after mandibular angle plastic surgery is not enough, or the drainage after mandibular angle plastic surgery is not good. Pressure bandage again.

3, infection: it is very rare in mandibular angle plastic surgery, the main reason is that the hematoma is not cleared in time. After infection, the wound should be opened in time, cleaned and drained well, and the infection can be controlled in a week or so.

4. Asymmetry: Due to the measurement of doctors, surgery may lead to bilateral asymmetry after mandibular angle surgery. If there is no serious asymmetry, you can use a small side bite or inject botulinum toxin A on the big side when eating, which will be better improved.

5. Nerve injury: The nerves involved in oral mandibular angle reduction are mainly mental nerve and inferior alveolar nerve, most of which are slightly numb after being pulled, and gradually recover in 3-5 weeks. If a fracture occurs, it is caused by rough operation or unfamiliar surgical anatomy.

6. Most hospitals do mandibular angle surgery with pendulum saw or reciprocating saw osteotomy. As the name implies, pendulum saw is sawtooth, which saws off the redundant mandible according to the principle of mechanical force. The complication of mandibular angle surgery is about 3.6%. Because the nerves and blood vessels are close to the mandibular angle, and the powerful inertia of the pendulum saw can easily hurt the nerves and blood vessels during the operation, once an accident occurs, it will lead to a major medical accident of massive bleeding and death.