Traditional orthodontic braces are small pieces of iron called brackets that are bonded to the teeth, and orthodontic archwires are ligated to them to move the teeth and achieve orthodontic treatment. However, because there are many orthodontic devices on top of the teeth, it gives people the feeling of “iron mouth and steel teeth”. At the same time, if the oral hygiene is not well maintained, it may cause gum inflammation, tooth demineralization and discoloration and other oral damages, which makes many patients, especially adult patients, look at “orthodontic” and afraid. As a result, Invisalign technology and braces have emerged. Invisalign is an emerging technology in recent years, the patent belongs to a U.S. company. It has been widely used in the United States, Japan, Korea, and Hong Kong, China. It has been introduced into Mainland China in the past two years and is popular among adult patients and women. Compared with the traditional fixed orthodontic technology, it has the following advantages: 1, beautiful and convenient: the aligner is made of transparent polymer material, which does not affect the patient’s image in the process of orthodontic correction, and at the same time, it is convenient to take off and wear, and it has little influence on daily life; 2, time and labor-saving: due to the simplicity of wearing the aligner and the amount of its correction has been determined during the orthodontic processing process, so that the doctor’s chair-side operation time, the patient’s follow-up time is significantly reduced; 3, clean and hygienic: oral hygiene is easy to be used. Clean and hygienic: oral hygiene is easy to maintain, avoiding gingivitis, tooth demineralization and discoloration and other common orthodontic complications; 4, predictable orthodontic results: with the help of computer-aided design technology in the design of the aligner, you can understand and inform the patient about the results of the entire orthodontic process before orthodontic correction, which is conducive to the identification of orthodontic programs, modification, and doctor-patient communication; 5, tele-orthodontics: As the whole orthodontic process can be simulated and processed throughout the orthodontic device, for some inconvenience normal follow-up patients can implement remote orthodontic.