Children are innocent and lively, and are active and playful. But lack of self-protection awareness. Children’s teeth are often due to sports, playing with each other and accidentally bumped off, especially the front teeth When the children’s teeth accidentally lost, should quickly find the lost teeth, immediately with water or salt water to rinse off the spoils, and promptly to the nearest hospital to ask the stomatologist to deal with. If the conditions of medical treatment are limited at that time, the dislodged teeth should be washed and put into light saline or saline (pure milk can also be), with antibiotic solution properly injected, and placed in a low-temperature environment for preservation, such as into the refrigerator temperature of 3-4 degrees Celsius. Then go to the hospital to see a dentist. Children’s teeth after the loss, if the surface has attached tissue; do not arbitrarily remove it with an appliance, do not leave it in a dry environment for too long or placed in corrosive medicinal solution. If the tooth loss involves the socket or gums, do not remove it at will, rinse it off, put it into light saline water together, and go to the hospital to give it to the dentist for treatment. If a child’s tooth is broken, it is usually broken horizontally and should not be thrown away, but should be preserved according to the above method and immediately taken to the hospital for treatment by the dentist.