A knocked-out permanent tooth, known clinically as an avulsed tooth, is one of the most time-sensitive dental emergencies. The window for successful reimplantation narrows rapidly: teeth reimplanted within five minutes have the highest success rate, those reimplanted within 30 minutes have a good chance, and after 60 minutes the prognosis drops significantly. Knowing exactly what to do in those critical first minutes can save a tooth that would otherwise be lost permanently.
Step one: stay calm and find the tooth. Pick it up by the crown, the white part you see when you smile, and never touch the root. The root surface is covered with periodontal ligament cells that are essential for reattachment, and handling the root damages these fragile cells.
Step two: assess the tooth. If there is visible dirt or debris on the crown, gently rinse it with milk or saline solution for no more than ten seconds. Do not scrub the tooth, do not use soap or chemicals, do not wrap it in tissue, and do not let it dry out. If the root appears clean, do not rinse it at all, preserving the periodontal ligament cells in their natural state gives the best outcome.
Step three: attempt reimplantation if possible. For an adult or older teenager, try to gently place the tooth back into its socket. Hold it in position by biting down gently on a clean cloth or gauze. This is the single best thing you can do for the tooth, as it restores the periodontal ligament cells to their natural environment immediately. If the tooth will not go back in easily, do not force it, proceed to step four.
Step four: preserve the tooth in an appropriate medium. The best options, in order of preference, are a tooth preservation product like Save-A-Tooth or Hank's Balanced Salt Solution, whole milk, saliva (have the patient hold the tooth between their cheek and lower gum), or saline solution. Never store a knocked-out tooth in water, the hypotonic environment causes the periodontal ligament cells to swell and burst. Never wrap the tooth in tissue or gauze, which dries out the cells.
Step five: get to a dentist immediately. Call ahead so the office can prepare for your arrival. If you are in the Shenandoah Valley, our Harrisonburg office on Medical Avenue is positioned to respond quickly to dental trauma. We are minutes from Sentara RMH if additional medical care is needed for facial injuries that accompany the tooth avulsion.
Important notes: this protocol applies to permanent teeth only. Baby teeth that are knocked out should not be reimplanted, as doing so can damage the developing permanent tooth beneath. Children who lose a baby tooth to trauma should still be seen by a dentist to evaluate for damage to the permanent teeth and surrounding bone. For any dental trauma involving a young child, our team can assess the situation and provide appropriate treatment or referral.
After reimplantation, the tooth will need to be stabilized with a flexible splint for one to two weeks. Root canal therapy is usually necessary within two weeks of reimplantation, as the nerve inside the tooth typically does not survive the trauma. With proper treatment, reimplanted teeth can last for years or even decades, making those first frantic minutes absolutely worth the effort.