Orthodontics is to correct the malocclusion and alveolar process deformity of anterior teeth (often including premolars) by surgical methods. The principle of traditional braces correction is to stick a nail on the tooth surface, that is, a dental appliance, and then fasten a steel wire on the nail, and use the steel wire to force the teeth to move and rearrange the teeth. Surgery is the first choice to treat irregular bones and teeth.