1, Hemorrhage, infection: It may be that the bleeding did not stop completely during the operation, which is also related to the aseptic operation during the operation;

2, facial distortion: it may be related to the injury of facial nerve and jaw nerve during the operation, so be careful not to damage the nerve during the operation;

3, left and right asymmetry: the operation can not be completely polished on both sides, so asymmetry may occur. If three-dimensional imaging can be done before operation, asymmetry may be minimized; And everyone may be born with asymmetry, so take pictures before and after the operation;

4, joint dislocation: after grinding the bone, the mandibular joint is in the temple, that is, the temporal bone. If the mandible is stressed too much during the operation, joint dislocation may occur. Complications will occur after bone grinding surgery. In order to avoid complications, preoperative examination is needed to fully understand the development of the patient's left and right cheekbones or mandible. Care should be taken during the operation to avoid damaging the facial nerve, which may reduce complications.