Clinical work encountered in the consultation of patients often have certain misconceptions about orthodontic treatment, roughly summarized as follows: a. Only after the replacement of teeth at the age of 12 can be orthodontic The traditional concept that only at the age of 12 can be orthodontic. This concept is actually one-sided, and even harmful. The actual developmental malformation is actually a developmental malformation, it is best to prevent and correct during the growth and development process. For the teeth “envelope”, small chin, facial asymmetry, serious buck teeth and serious crowded teeth, facial muscle function abnormalities, these affect the normal development of facial bones and oral function, it is advisable to correct the earlier the better. Second, orthodontics is the patent of children and young people Many people think that orthodontics is only for children and young people, the elderly can not be orthodontic treatment, in fact, this view is wrong. Although the growth and development of adults has stopped, the external shape of the bone has been stabilized, but the internal regeneration and reconstruction of bone still exists, in general, adults without serious periodontal inflammation, teeth can be orthodontic. Third, orthodontic pain can not normal diet After each orthodontic force, the patient will feel a little soreness within two or three days, these minor discomforts are generally tolerated and will soon disappear, is the normal reaction of the body caused by orthodontic treatment, no need to worry. As for the diet, during the orthodontic treatment can not eat harder things such as and very sticky things, other basic can eat, generally after the orthodontic treatment can be normal diet. Fourth, the extraction of teeth orthodontic harmful Many patients or patients’ families often need to be extracted from the orthodontic treatment do not understand, worried that the orthodontic treatment in the extraction of teeth will affect chewing, so that the unwillingness to extract teeth and give up the orthodontic treatment, this concern is superfluous. The orthodontic treatment rearranges the teeth through orthodontic force, and in the process of rearrangement often requires a certain gap to align the crowded teeth, or for some buck teeth patients inward protrusion of the incisors to improve the facial shape. Five, after orthodontic teeth easy to lose teeth in old age Some parents worry that orthodontics will cause loose teeth in old age, and even early loss of teeth, this view is not scientific. Orthodontics is to induce tooth movement through light orthodontic force, is a slow biological alteration process, the side of the moved teeth bone resorption, the other side of the new bone reconstruction, and finally make the teeth move to a normal position. The process is gradual and the teeth are stable. Orthodontic treatment is not traumatic to the teeth and periodontal tissues.