The medical term for a knocked out tooth is "avulsed" tooth.
Teeth - broken; Tooth - knocked out
A permanent (adult) tooth that is knocked out can sometimes be put back in place (replanted). In most cases, only permanent teeth are replanted into the mouth. Baby teeth are not replanted.
Tooth accidents are commonly caused by:
Save any tooth that has been knocked out. Bring it to your dentist as soon as possible. The longer you wait, the less chance there is for your dentist to fix it. Hold the tooth only by the crown (chewing edge).
You can take the tooth to the dentist in 1 of these ways:
Also follow these steps:
If your tooth is badly broken, your nerve endings may be exposed. You will need dental help right away to avoid infection and pain.
You may not need an emergency visit for a simple chip or a broken tooth that is not causing you discomfort. You should still have the tooth fixed to avoid sharp edges that can cut your lips or tongue.
If a tooth breaks or is knocked out:
Call your dentist right away when a tooth is broken or knocked out. If you can find the tooth, bring it with you to the dentist. Follow the steps in the First Aid section above.
If you cannot close your upper and lower teeth together, your jaw may be broken. This requires medical help right away at a dentist's office or hospital.
Follow these guidelines to prevent broken or knocked out teeth:
Cohenca N. Management of traumatic dental injuries. In: Torabinejad M, Walton, RE, Fouad AF, eds. Endodontics: Principles and Practice. 5th ed. St. Louis, MO: Elsevier Saunders; 2015:chap 11.
Tinanoff N. Dental trauma. In: Kliegman RM, Stanton BF, St Geme JW, Schor NF, eds. Nelson Textbook of Pediatrics. 20th ed. Philadelphia, PA: Elsevier; 2016:chap 314.