Self-ligating brackets rely on sliding or rotating bracket caps, peg caps or elastic clips to hold the archwire in the bracket groove, as opposed to traditional ligating brackets. The self-ligating brackets were invented by New York orthodontic pioneer Dr. Stol-zenberg and are characterized by low friction, shorter orthodontic sessions, and favorable oral hygiene. As a result, more and more orthodontists are recognizing and using self-ligating brackets. Specifically, self-ligating brackets have the following advantages: 1, for the doctor, the operation is very simple and trouble-free, saving the occupancy time of the dental chair and operation time. 2. The patient is in the chair for a short time and easy to operate, which means less pain for the patient. 3, lift-off self-locking features, eliminating the traditional bracket ligature added force, free ligature is free from the pain of added force. 4, after the aligners are worn, and after each follow-up visit to add force, the pain response is very light, much less than the pain response of traditional aligners. 5, self-ligating brackets aligners can be stretched to as long as 8 weeks before the follow-up, saving the patient’s time costs and reducing the number of follow-up visits, for students is to not have to miss homework because of dental visits. 6, because each review after the force has a few days of pain response period, the review cycle is longer means that the number of pain response is also less. 7, The smaller size of self-ligating brackets aligners facilitates comfort and the maintenance of oral hygiene. 8, The most significant advantage is that self-ligating brackets aligners do not have the frictional resistance of traditional brackets because they are ligation-free, making it possible to shorten the total course of treatment by 1 to 4 months. This is what makes self-ligating brackets so attractive. Although there are many advantages of self-ligating brackets, according to orthodontist Prof. Xie, there are certain problems in aesthetics. Because self-ligating brackets are metal products, the aesthetics are poor, and the price is much more expensive than other braces.