In addition to time, cost, and extraction considerations for many patients, an important barrier to orthodontic treatment is the aesthetics of the aligners. Currently we commonly use orthodontic appliances are mainly made of stainless steel. Sturdy, durable and efficient. However, their unavoidable disadvantage is their aesthetic problem. The fact that they are worn visibly in the mouth discourages some adult patients who are more socially active. To overcome the aesthetic problems of metal braces, invisible aligners have been developed. The current invisible aligners are mainly the following: 1, ceramic brackets aligners: this aligner brackets are made of ceramic, and tooth color, but because the orthodontic arch wire can not yet be made into tooth color, so the overall can only be invisible seventy to eighty percent. The price is higher than traditional metal braces, which are preferred and accepted by many adult patients. Its efficacy and metal braces consistent, but because of its brittle, use and maintenance is a little more trouble. 2, lingual braces: as the name implies, this technique places the braces on the lingual side of the teeth. The advantages are obvious: completely invisible and aesthetically pleasing. Disadvantages are also conceivable: difficult to operate, each treatment time is long; greater stimulation of the tongue, uncomfortable; talking and eating will be significantly disturbed; hygiene is not easy to maintain; and the efficacy is not as good as traditional braces; the cost is quite high. In short, this type of aligner has almost no advantages except for aesthetics. Therefore, the use of this type of braces is highly polarized. Some doctors refuse to use it, and some doctors love it. At present, this type of braces are mainly used for a small number of adult patients with very high requirements for aesthetics, good tolerance, and good economic conditions. 3, bracketless braces: this brace does not use brackets and wires, correction through a series of computer-designed transparent resin braces to complete, the patient only need to take the braces home, gradually replaced as required, to complete the correction. It is basically completely invisible. Recently, this technology has developed rapidly, and Invisalign’s technology is among the most advanced. With proper design and cooperation between the doctor and the company’s technicians, most cases (including extraction cases that were considered difficult to complete) can be treated with this technology. Experts predict that with the advancement of technology, more and more doctors and patients will adopt this technology in the future, which will definitely replace traditional braces in a large percentage. The advantages of braceless braces can be categorized as follows: 1. Invisible. These aligners are completely invisible. It can be completed without the knowledge of the people around you. 2, comfortable. This type of braces small size, small force, patient discomfort is very light. 3, does not affect eating. Traditional braces, there are a lot of restrictions on eating, and bracketless braces can be removed as a result of eating, so the restrictions on eating is much less. 4, does not affect the social, braces itself invisible. If the patient has further requirements, in the occasional few hours of social activities, without the use of braces, is not affected by the effect. 5, you can predict the effect of treatment in advance. Because the braces are created by computer simulation, patients can see the treatment process and the final results immediately when the design of the program is completed. 6, each step has been obtained orthodontic effect can be presented immediately. Unlike traditional braces, the treatment effect can only be seen when the braces are removed. Patients with bracketless braces can remove the braces at any time to observe the orthodontic effect achieved and show it to others. 7, the number of follow-up visits is less. With traditional braces, follow-up appointments are generally required every 4 to 8 weeks. This is a stressful situation for many people. Aligners without brackets, depending on the condition and different designs, can be done once every few months or even a year or more, which is a great convenience for both students with heavy study loads and adults who are busy with life and work. So many advantages, so what are the disadvantages of this bracketless orthodontic technology? Two: 1, high cost, due to the high cost of pre-development and technology monopoly, the current cost of bracketless orthodontic technology is much higher than the cost of traditional braces. 2, some too complex cases, still need to use traditional braces or and with the combination of traditional braces to complete. But in general, bracketless orthodontics is a revolutionary development in the field of orthodontics, an organic fusion of computer technology, 3D printing technology, new materials and traditional orthodontic concepts. It has and will continue to bring seismic changes to orthodontics, ultimately making orthodontics more concise, easier and more enjoyable. Therefore, if you have a request for invisible orthodontics, you may want to make a choice among the above mentioned methods.