Orthodontic brackets are devices made of metal or ceramic that are fixed to the tooth surface with a special adhesive to hold and secure orthodontic wires and transmit orthodontic forces to the teeth for the purpose of straightening teeth. Traditional orthodontic brackets need to be fixed together with fine wires or rubber bands and orthodontic wires, while self-ligating brackets have an additional locking device than traditional brackets, which is like adding a door to the brackets and can directly lock the orthodontic wires in the grooves of the brackets, eliminating the need for ligating wires or rubber bands to bind the orthodontic wires. Self-locking brackets are a new technology that has emerged in recent years. It is a seemingly small change that has revolutionized fixed orthodontic technology. There are many advantages of self-ligating brackets compared with traditional brackets. 1.Comfort: Traditional orthodontic brackets need to be ligated with fine wires and orthodontic wires, which are relatively easy to cause soft tissue damage. The self-ligating brackets do not require ligatures, avoiding damage to soft tissues at the end of the ligature wire. In addition, self-ligating brackets orthodontic technology is to achieve the movement of teeth under gentle light force, so patients are not easy to feel pain and discomfort, so that patients can complete treatment in a relaxed and pleasant situation. 2, high efficiency: traditional brackets because orthodontic treatment to move the teeth need to overcome the frictional resistance between the wire and brackets, the greater the friction, then the greater the orthodontic force required, the slower the movement speed, the longer the time required for orthodontic treatment. The increased freedom of the archwire in the self-ligating brackets reduces the friction between the archwire and brackets, which is conducive to the movement of orthodontic teeth, thus shortening the course of treatment and completing orthodontic treatment earlier. 3. Convenience: The interval between follow-up appointments for traditional fixed orthodontics is about 4 weeks, which means that patients need to go to the hospital once a month for adjustment. With self-ligating brackets, the follow-up interval can be extended to 6-10 weeks, which means that the patient can go to the hospital once every two months for adjustment, which is especially convenient for patients from overseas or those who are busy with their studies and work. 4, hygiene: self-ligating brackets because there is no ligature wire and other attachments, compared to traditional orthodontic brackets is more conducive to oral hygiene, is conducive to the protection of periodontal tissue health, orthodontic effect is more stable. 5.Reducing tooth extraction: Since the friction of self-ligating brackets is extremely low, the movement of teeth is easier, so some patients who used to be treated with traditional techniques that required tooth extraction can now be treated without tooth extraction. Since most of the self-ligating brackets are currently manufactured overseas and their structure is more complicated, self-ligating brackets are much more expensive than ordinary orthodontic brackets. However, since it has many advantages that traditional brackets do not have, self-ligating brackets will be increasingly used in orthodontic clinics. In recent years, the self-ligating brackets orthodontic technology carried out by the Affiliated Dental Hospital of Nanchang University has been fully affirmed and generally praised by patients for its efficacy.