Hello, orthodontics usually takes about one and a half to two years. Generally speaking, due to the disproportional degradation of jaw and teeth, the position of teeth eruption is often insufficient, which will lead to crowded dentition and seriously affect occlusion and aesthetics, so orthodontic treatment is needed. The cost of orthodontic treatment is about 10000 yuan. If there is tooth extraction, the cost may be higher. There is also malocclusion, which is skeletal malocclusion. In this case, the cost of orthodontics will be higher, about 20 thousand yuan. It is recommended to go to a regular hospital for orthodontics, and you must cooperate with the doctor for orthodontics. During orthodontics, you must pay attention to oral hygiene and brush your teeth to avoid neat teeth and tartar damage.