1. Death or vegetative state. It’s scary, and until this year, we often heard this kind of cases. Most of them are caused by hemorrhage, and a few are anesthesia accidents. The mandibular region, rich in blood vessels, is where the large blood vessels supplying the brain and face of the neck reside in unison. There is hemorrhagic shock death directly caused by bleeding, and there is also death by asphyxia caused by bleeding. 2, facial nerve injury. In mild cases, the corners of the mouth are skewed, the force of puffing is slightly worse, and the expressions of eating, talking and laughing are strange; in severe cases, the corners of the mouth are skewed to one side, drooling, and the speech leaks like a hemiplegic patient. 3.Chin nerve injury. Lower lip sensory impairment, numbness. 4.Fracture outside the mandible, very common, we often do this repair surgery. 5.Strain on the corner of the mouth, caused by the pulling of the surgical tool. 6, Asymmetry on both sides, this is also one of the frequent restorations. 7, the lower edge of the mandible is uneven, and a sense of bone steps can be locally felt. 8.There are two mandibular angles on one side of the mandible. 9.Excessive removal of the mandibular angle. 10.There are many more, we have summarized many such cases, actually much more than these.