Teenagers are active and energetic, often bumping and banging, new teeth are not used for a few days before they break, what a pity ah to avoid dental trauma, first of all, we must improve their own protection awareness, and at the same time to restrain themselves from doing actions that are dangerous to others once the dental trauma, the tooth is broken, if only a small corner is broken, no nerve is exposed, you can grind if no nerve is exposed, but there is pain. We should let the tooth rest and try to protect the pulp so that it can gradually recover and avoid pulp necrosis. If half of the tooth is broken off and the nerve is exposed, pulp treatment should be carried out, and it is best to review the tooth once every six months to observe it at any time and promote recovery. Remember, the success rate of the first reimplantation is very high.