The technology of orthodontic treatment has come a long way, so do not think that orthodontics is something done only in childhood, in fact, as long as there are healthy teeth, adult orthodontics is also not limited by age. Adult orthodontics can also grasp the full extent of its domestic adults orthodontic compared to teenagers much less, for the following reasons: 1, adults then pursue orthodontics, it seems to be more beautiful, generally do not feel too good. 2, the misconception that adults have developed mature teeth and bones, and therefore can no longer move. 3, too few adults receive orthodontic treatment, and therefore do not want to do very different. In fact, with the advancement of orthodontic treatment technology, adults can actually receive orthodontic treatment. Of course, the more serious jaw problems (buck teeth or a protruding lower jaw with a bun in the ground) are far more difficult to treat than treating adolescents. However, if orthognathic surgery is performed by an oral and maxillofacial surgeon, there is almost no limit to the orthodontic treatment for adults; moreover, in the past two to three years, the use of bone implants as a support to significantly move the jaw and teeth can replace some of the orthognathic surgery and treat only some of the severe jaw problems with traditional orthodontic methods. 1, adults with a small gap between the upper and lower jaws: this kind of teeth can be completed with traditional orthodontics, but adults have a much higher chance of periodontal disease than teenagers, if there is periodontal disease and not controlled first that orthodontic treatment, there is the possibility of aggravating periodontal damage or even the loss of teeth due to orthodontics. If periodontal disease can be controlled before treatment, orthodontic treatment can still be achieved as long as the force applied is light and the movement is slow, and healthy periodontal tissue can still be maintained. 2.Adults with buck teeth: In the past, adult patients with buck teeth often received the so-called traditional dental treatment by sawing off all the crowns of the bucked maxillary front teeth and then making a row of dentures, which could barely tilt the angle of the upper incisors slightly toward the lingual side, but could not change the protruding maxilla, and the patients were always disappointed. The appearance of buck teeth. Therefore, orthodontic treatment for adults should only be performed under correct diagnosis in order to obtain the desired results. 3. Crowded teeth or too much space: This problem can often be seen in adults who have to make dentures to reshape their teeth because of missing teeth. If the space is not redistributed first with orthodontic treatment, it is easy to cause the dentures made too small, too large and other asymmetrical and unattractive problems, if you can correct the arrangement before the restoration of the ideal space allocation to do the restoration, you can get very beautiful results. For example, the gap between the maxillary incisors, if the gap directly into a small tooth will be very ugly, if the upper incisors directly make a larger denture, it will cause two huge incisors, also very ugly; if the use of orthodontics to make the gap smaller or closed, it is more beautiful or even do not have to do dentures. 4, missing teeth: adults missing teeth is a fairly common phenomenon, missing teeth area is often accompanied by space is not suitable for direct dentures, if the orthodontist diagnosis of space redistribution, dentures will be much better to do, some cases can even be missing teeth area using the adjacent teeth to move and completely closed. In some cases, the alveolar ridge in the missing tooth area is not suitable for dental implants or dentures due to the narrow ridge formed by the missing teeth for too long, so the orthodontic movement can be used to create a fuller ridge for the production of dental implants or dentures. At present, the subspecialties of dentistry are very detailed and specialized. If a set of integrated diagnosis and treatment can be made for each patient’s individual dental alignment and facial shape, the patient will receive the best treatment. If the orthodontist can fully cooperate with the orthodontist, the patient will receive the best care and get the best aesthetic and healthy teeth.