Forty years old is also possible, orthodontic teeth is not a specific age limit, as long as the alveolar bone, tooth resorption is not very serious, and the teeth are not a lot of caries can do orthodontics. Orthodontic treatment is generally reviewed once a month, the tooth accessories have fallen off or appear arch wire separation, individual hospitals need to carry out another charge, patients should be treated according to medical advice with good doctor teeth can be corrected successfully, can not cooperate with the requirements of the time can not be achieved is easy to correct failure. This is regardless of age group just need long-term review, and cooperate with the doctor treatment, at the same time, it is recommended to follow the doctor’s advice at home, the time with accessories should be worn in time to help orthodontic success.