The malocclusion caused by overdevelopment of mandible is called mandibular protrusion in plastic surgery. The operation to treat mandibular protrusion is called mandibular protrusion correction or mandibular deformity correction. The operation is carried out under general anesthesia, and it takes a period of recovery after operation. Smoking and drinking should be avoided before operation, and women should avoid menstrual period. The subject can't undergo surgery until the bone is fully developed. The general price is around 25 thousand to 30 thousand. The correction of mandibular protrusion requires doctors to have rich experience, so it is necessary to choose a good doctor to ensure the effect of the operation.