Self-ligating brackets are a new technology that has emerged in recent years. It is a seemingly small change that has revolutionized fixed orthodontic technology. Its main advantage is that it can greatly reduce the frictional resistance between the wire and the brackets. Because orthodontic treatment requires overcoming the frictional resistance between the wires and brackets to move the teeth, the greater the friction, the greater the orthodontic force required, the slower the movement, and the longer the orthodontic treatment will take. Self-locking brackets orthodontic technology has the following advantages over traditional orthodontic techniques: 1, shorten the treatment time currently there are a variety of self-locking brackets produced by different companies, some self-locking brackets can shorten the course of treatment for more than six months. 2, extend the follow-up interval traditional fixed orthodontic follow-up interval of about 4 weeks, that is, the patient needs to go to the hospital once a month to adjust; and the use of self-ligating brackets orthodontic follow-up interval can be extended to 8 to 10 weeks, that is, the patient can go to the hospital every two months to adjust. 3, eliminating the need to extract teeth because the friction of self-ligating brackets is extremely low, the movement of teeth is easier, so some patients who used to need extraction treatment can now be treated without extracting teeth. 4.Comfortable and gentle orthodontic force makes orthodontic patients feel much less discomfort. The price of self-ligating brackets is often more complex and expensive than ordinary orthodontic brackets, but because it has advantages that traditional brackets do not have, self-ligating brackets will be used more and more in orthodontic clinics.