After dental trauma occurs, the chance of pulp necrosis is very high, which requires patients to take x-rays regularly to check the status of pulp vitality, and root canal treatment is needed when necessary. Some patients don’t pay enough attention to this and can’t make the checkup on time, which leads to inflammation, swelling and pain of the tooth root, and even the formation of jawbone cysts, and finally the need to extract the tooth or undergo surgical treatment, which greatly increases the pain and treatment cost. The treatment of dental trauma should depend on the condition of the injury, and mastering the correct treatment method will greatly reduce the patient’s pain and treatment costs. If the tooth is not subjected to much collision force, usually no obvious reaction, only a slight knocking pain or loosening, can be weeks or months after gradual recovery. 1~2 weeks after the occurrence of trauma should pay attention to let the affected teeth rest, do not use the affected teeth to bite things, in order to reduce the burden on the affected teeth; if the tooth loosening is obvious to be ligated and fixed. After the injury should be regularly reviewed, 1 year later, if the review of the affected tooth has no abnormalities, can not be treated; if the nerve has signs of necrosis (i.e., crown discoloration or x-ray examination shows apical shadows), it should be further root canal treatment. If a crown fracture occurs, the area is relatively small and generally does not need to be treated. If the edge of the fracture is sharp, the sharp edge can be smoothed to prevent scratching the lips or tongue. If the fracture area is large and there is soreness when encountering hot or cold temperature stimulation, the tooth can be covered with medication to isolate the external stimulation, and then the filling material can be used to repair the tooth defect. For the deeper fracture of the tooth, you can ask the prosthodontist to consult the doctor, there is a preservation value, you can make full use of the remaining tooth body for restoration after root canal treatment; really can not be retained, had to be extracted and then restored. The principle of treating dislocated teeth is to save the affected teeth as much as possible. Partially dislocated teeth should be reset and ligated under local anesthesia. If the nerve is found to be necrotic, root canal treatment should be carried out in time. Embedded dislocated teeth should not be forcibly pulled out and reset if the roots are not yet developed, so as not to cause more trauma. Symptomatic treatment should be carried out, regular observation should be carried out, and the tooth should grow out naturally, generally within six months, the tooth can grow out to its original position. If the tooth is completely dislocated, it should be reimplanted immediately.