[*]Handle the tooth carefully. Try not to touch the root (the part of the tooth that was under the gum). It can be damaged easily.
[*]If the tooth is dirty, hold it by the upper part (the crown) and rinse it with milk. If you don't have any milk, leave the tooth alone. Don’t wipe it off with a washcloth, shirt or other fabric. This could damage the tooth.
[*]Keep the tooth moist. Drop it into a glass of milk. If you can't do this, place the tooth in your mouth, between the cheek and gum. A young child may not be able to safely "store" the tooth in his or her mouth without swallowing it. Instead, have the child spit into a cup. Place the tooth in the cup with the saliva. If nothing else is available, place the tooth in a cup of water. The most important thing is to keep the tooth moist.
[*]Try slipping the tooth back into its socket. In many cases, it will slip right in. Make sure it's facing the right way. Don't try to force it into the socket. If it doesn't go back into place easily and without pressure, then just keep it moist (in milk, saliva or water) and get to the dentist as soon as you can.
[*]It usually takes about two weeks for ligaments in the jaw to firmly reattach to the tooth. A knocked-out tooth that has been replaced probably will need root canal treatment. This will remove the damaged nerve and keep the tooth from darkening. It also helps to prevent infection.