Children’s teeth knocked out a little should immediately go to the stomatology department for examination, direct filling without pulp exposure, near the pulp to appease the observation, the pulp needs to be judged according to the situation and then the treatment method. 1. If a child’s tooth is knocked out, he or she should go to the dentist immediately for examination. Firstly, the dentist should determine whether the tooth is a milk tooth or a permanent tooth, and then determine the condition of the pulp, and then carry out the treatment according to the situation, and it is also necessary to take X-ray apical radiographs to assist in the examination, and to determine the condition of the root of the tooth, or whether the tooth is dislocated or not. 2. If the defect of milk tooth or permanent tooth has not exposed the pulp and the symptoms are mild, you can choose direct filling and resin material to restore the shape of the tooth. 3. If the missing milk tooth or permanent tooth is near the pulp and the symptoms are mild, it can be filled after cushioning. If there are obvious symptoms, you can choose to pacify and observe for 1~2 weeks to reduce the symptoms before filling. 4. Traumatic defects of milk teeth with exposed pulp and long exposure time are recommended to undergo root canal treatment. It is recommended to go to the hospital as soon as possible to find out the situation and then further treatment.