Orthodontics is a routine treatment of oral cavity. In the reality that the evolution speed of jaws is fast and that of teeth is slow, 90% of individuals have crowded teeth. It is suggested that malocclusion should be corrected by professional stomatology or dental clinic when 12 years old. Orthodontics is to rearrange teeth by means of brackets temporarily fixed on the surface of teeth and relying on the strength of arch wires. It is generally recommended to complete it before 18 years old. At this time, the jaw is in the growth stage, and the ability to repair periodontal ligament is small. Because orthodontics requires multiple follow-up visits, the course of treatment is about 2 years, so it is more reasonable to choose the nearest and long-term medical institution. As for adults, due to social conditions, invisible orthodontic treatment, transparent bracket orthodontic treatment and lingual orthodontic treatment can be selected. Its concealment is strong. The effect is slightly worse than juvenile correction. The course of treatment is longer. But as long as according to the doctor's original design (including tooth extraction correction). Follow up on time. If you don't want to be quick, you can achieve satisfactory results.