If your child falls down accidentally while playing with classmates and breaks an incisor, please do not be anxious. First of all, observe whether your child has other injuries, especially whether the head has been hit, if there is dizziness, nausea and other symptoms to first go to a general hospital for cranio-cerebral disease, and then go to a dental hospital for treatment of the affected tooth after the condition has stabilized. At the same time, it is also important not to abandon the broken tooth, it is best to put it in saline, or put it in milk or under the tongue, and go to a dental specialist as soon as possible. The broken tooth should first be X-rayed to observe whether there is any fracture of the root and alveolar bone, the development status of the root and so on. And through careful clinical examination, the best treatment plan will be formulated. Generally speaking, if the root is not fully developed, the pulp should be protected as much as possible (pulp capping, pulpotomy, etc.) so that the root can continue to develop normally. Secondly, the broken crown can be reattached with bonded resin material or restored directly with aesthetic material to maintain the gap between the teeth, maintain pronunciation and restore the aesthetics. At the same time, if the affected tooth is loose, dental fixation (ligature fixation, full cushion fixation, etc.) should be performed. Each affected tooth will have different treatment methods depending on its fracture time, location and development, and the treatment results will vary greatly. Also, traumatized teeth need to be reviewed regularly to observe the healing process.