There are many types of orthodontic appliances, which can usually be divided into fixed orthodontic appliances and movable (removable) orthodontic appliances. I. Fixed orthodontic appliances: This means that the aligners are bonded to the tooth surface and cannot be removed by the patient. They can be divided into labial fixed aligners and lingual fixed aligners. Lip-side fixed aligners: the aligners are bonded to the lip side of the teeth (outside). Depending on the material, they can be divided into metal and ceramic aligners. The picture below shows the metal braces on the labial side, which can be chosen by patients who do not have high aesthetic requirements. China-Japan Friendship Hospital Dental Center Wu Guanying The picture below shows the lip-side ceramic aligners, which are more aesthetically pleasing compared to metal aligners. , lingual fixed aligners: the aligners are bonded to the lingual side (inner side) of the teeth, and the aligners are completely invisible from the outside, achieving an absolutely aesthetic effect. They used to be chosen by patients with special occupational requirements, such as actors, presenters, lawyers, etc., but with the development of the economy more and more adult patients are choosing these aligners. Second, movable (removable) orthodontic aligners: made of a special transparent material, the treatment process can be taken off by the patient, take off the aligner teeth only leave some attachments, very beautiful. However, it is difficult to precisely control the movement of the teeth in three dimensions, and the range of adaptation is slightly narrower. These are the types of orthodontic braces, patients can choose the most suitable braces according to their needs, under the guidance of orthodontic specialists!