What should I do if my child’s permanent tooth is knocked out?
Find the tooth and rinse it gently in cool water. (Do not scrub or clean it with soap — use only water!) If possible, replace the tooth in the socket immediately and hold it there with clean gauze or a wash cloth. If you can’t put the tooth back in the socket, place the tooth in a clean container with cold milk, saliva or water. Get to the pediatric dental office immediately. (Call the emergency number if it’s after hours.) The faster you act, the better your chances of saving the tooth.
Source: http://www.aapd.org/publications/brochures/ecare.asp
