1.Shorten the treatment time Especially for the case of tooth extraction, the treatment course can be shortened for more than half a year. 2, extend the follow-up interval The follow-up interval of traditional fixed orthodontics is about 4 weeks, that is to say, the patient needs to go to the hospital once a month to adjust. The use of self-ligating brackets orthodontic treatment can be extended to 6 to 8 weeks, which means that the patient can go to the hospital every two months or so to adjust.