If a permanent tooth has been knocked out of its socket (avulsed), immediate attention is required. First, recover the tooth — and if it’s dirty, gently clean it off with water. Try not to touch the root portion of the tooth. Next, if possible, place the tooth back into its socket (making sure it is in the proper orientation), and apply gentle, sustained pressure to the area for five minutes. You can use a wad of wet tissue or gauze to help grasp and hold the tooth in place. Get emergency dental treatment as soon as possible afterward, and be sure to check whether a tetanus shot or booster is needed.
If it isn’t possible to replant the tooth, have the patient hold it between his teeth and cheek, or place it into a plastic bag with the patient’s saliva, or into a cup of cold milk. Control bleeding from the tooth socket by applying pressure to the area (use gauze if possible), and get the patient and the tooth to an emergency treatment center as soon as possible. Primary (baby) teeth, however, don’t usually need to be replanted.