The misalignment of the teeth is considered to be related to retained milk teeth, multiple teeth, malocclusion and so on, and the patient can follow the doctor’s instructions for surgical treatment. 1. Retained milk teeth: The treatment of retained milk teeth is mainly based on extraction of milk teeth, and the contraindications should be checked before extraction, and after extraction, local cotton balls should be filled in to stop bleeding, and food should not be eaten within 2 hours. For some inherited permanent teeth with poor occlusion, orthodontic treatment is feasible. 2. Multiple teeth: Multiple teeth can cause some patients’ teeth to be crowded and misplaced, usually patients need to cooperate with doctors to extract the multiple teeth to ensure that normal teeth have enough growth position. 3. Malocclusion: teeth are crowded misalignment is also considered to be caused by malocclusion, the patient can follow the doctor’s instructions with orthodontic appliances to improve, such as movable orthodontic appliances, functional orthodontic appliances, and so on, but also feasible dental orthopedic surgery, and so on. It is recommended that the teeth are crowded misalignment medical examination, clear cause of the disease, follow the doctor’s instructions for treatment, do not use drugs or prescriptions. Daily attention to oral hygiene, timely brushing and rinsing after meals to prevent gingivitis, caries and other oral diseases.