Orthodontics can be done at the age of 35, and there is no strict age limit for orthodontics. Orthodontics is a kind of orthodontics for the beauty of teeth, which is very popular in recent years, especially among young people. Under the condition of healthy periodontal tissue, the orthodontic effect of adolescents aged about 12 is the best. Adults can also correct it, but it is more difficult and the course of correction is longer. Because the alveolar bone of adults has been formed in all aspects, the speed of teeth moving will be slower, and the reconstruction of alveolar bone will take longer to adapt and rebuild. Therefore, as long as the periodontal health and coordination are good, adult correction is no problem, but the course of treatment will be longer.