Children’s teeth can be repaired if there is no longitudinal fracture, and longitudinal fracture usually needs to be implanted after extraction. 1. For children, because of their playful nature, when they accidentally fall down, they may touch their teeth, which in turn causes the phenomenon of a broken section of the tooth, whether or not it can be repaired at this time should be judged in conjunction with the actual situation of the patient. 2. If a child’s tooth is only broken at the cut end and the pulp has not yet been exposed, it can actually be repaired by first carrying out acid etching treatment and then applying bonding agent to fill the composite resin. When the filling material is not easy to fix, it can be attached along the cementing nail in the dentin layer to enhance the resistance. 3. If a child’s fractured tooth exposes pulp, if it is a permanent tooth, then pulp-preserving treatments such as pulp capping and apical induction molding can be performed. Exposed pulp in milk teeth can be treated with root canal therapy or extraction. 4. If the root of a child’s tooth is found to have fractured longitudinally during radiographic examination, the overall prognosis is poor and cannot be repaired, and the child needs to cooperate with the doctor to carry out implant restoration treatment after tooth extraction in order to improve the appearance and function. It is recommended that children should go to the hospital as soon as possible after a tooth is broken and be diagnosed and treated by a medical professional.