In recent years, due to the development of transportation, diversification of sports and games, and children’s active nature, the chances of falls and injuries have increased, and the occurrence of dental trauma has a tendency to increase. However, many children, parents and teachers do not know what to do in case of dental trauma, and even delay the treatment due to improper treatment, which makes the treatment more difficult. What should children do after dental trauma? After maxillofacial injuries, if there is no obvious damage to the teeth, due to oral soft tissue tears, bleeding more, should immediately use a handkerchief or gauze compression to stop bleeding, and immediately sent to the hospital for debridement and suturing treatment, if necessary, should be injected with tetanus antitoxin to prevent tetanus infection. 1, after the impact on the teeth, if the teeth are intact or only surface cracks, no loose displacement of teeth, no obvious pain and discomfort symptoms, it is best to go to the hospital to rule out the root fracture. The treatment can be observed, do not gnaw food with the injured tooth, do not eat too cold and too hot food to reduce stimulation, and follow the doctor’s requirements for regular follow-up and timely treatment of the problem. In some cases, tooth discoloration and root inflammation will occur in the distant future, which should be treated at the hospital in time. 2, after the trauma occurred when the tooth fracture, such as only a small part of the loss, no significant impact on the tooth shape, the tooth is not loose, no cold and hot sensitivity discomfort symptoms, can go to the hospital to sharp and rough fracture surface grinding can be. If the fracture is larger, the tooth is more sensitive when absorbing cold wind, or the exposed pulp is seen at the fracture end, you should try to go to the hospital within half an hour to receive the correct treatment, and the clinical efficacy is better within this time frame. If the time is too long, the chances and degree of contamination of the pulp by bacteria and toxins will increase, and the possibility of inflammation of the pulp and failure of pulp preservation treatment will increase after treatment. 3, after dental trauma, when the crown of the tooth is found to be shortened or embedded in the tooth bed, the tooth is not loose, and there is blood oozing from the gum edge, then the embedded injury of the tooth into the alveolar bone may have occurred. At this time, the child should be taken to the hospital for examination and X-ray to confirm the diagnosis. If the child is young and the tooth is not fully developed, it can be observed regularly until the tooth erupts on its own. The chance of “re-eruption” of fully developed teeth is small, and the teeth can be “reset” or “pulled” out of the dental bed through surgical or orthodontic methods. 4.When the teeth are loosened and displaced, the teeth are partially dislodged or displaced from the alveolar sockets, do not blindly press to reset, causing secondary trauma, you should find a dentist to reset and fix as soon as possible, and keep the oral hygiene of the child during the fixation period, do not use the affected teeth to bite objects. If a tooth with a fractured root is not easily detected by visual examination, an X-ray is needed to confirm the diagnosis. For traumatic teeth with a fracture near the root tip or neck, the doctor can give a conservative treatment to preserve the affected tooth or part of the root; for teeth that must be extracted, a doctor must confirm the diagnosis, otherwise do not extract them easily. 5.When you encounter a tooth that is completely lost, you should find the lost tooth immediately. Many people think that it is useless to lose teeth, but in fact, as long as you master the time and method of replanting, teeth can be successfully replanted. If the lost tooth is already dirty, you can gently rinse it with saline nearby, pinch the crown not the root when rinsing, and more importantly, you cannot scrub the root with your hand or cloth. The deciduous tooth should also not be wrapped in paper, dry cloth or cotton to prevent damage to the periodontal membrane tissue. The scoured tooth should be put back into the socket as soon as possible, kept in place, and rushed to the hospital immediately. If it cannot be reset immediately, the dislocated tooth should be prevented from drying out and can be put into fresh cold milk or saline, or the tooth can be placed under the tongue so that the tooth has a suitable temperature and keeping the surface of the tooth moist, which is a favorable condition for successful dental reimplantation. Younger children who cannot put it under the tongue by themselves for preservation can be replaced by their parents. If the tooth can be reset within half an hour, the success rate can reach more than 90%; on the contrary, the success rate of replantation is greatly reduced if the lost tooth stays outside the mouth for more than two hours, and the failure rate is reported to be more than 90%. In conclusion, you should go to the hospital immediately after tooth trauma. The shorter the time from the occurrence of trauma to the time the tooth is treated, the higher the chance of successful treatment. In addition, it is important to visit the hospital regularly after the treatment of traumatized teeth, and to carry out relevant treatment in a timely manner depending on the examination.