Orthodontics is to treat malocclusion through orthodontics or surgery. Malocclusion refers to the deformity of teeth, jaws and craniofacial surfaces caused by congenital or acquired factors during the growth and development of children. Malocclusion, dental caries and periodontal disease are three common diseases in oral cavity, and its prevalence rate is as high as 50% of the population. The specific cost needs to be determined according to the specific treatment plan after going to the hospital for examination. There is no best hospital, and the eighth five-year plan hospital has a good reputation.