Person smiling for a dental emergency guide

Published August 22, 2025Written by Landmark Dental Care

What to Do With a Knocked-Out Tooth

If a permanent tooth is knocked out, act quickly: pick it up by the crown, keep it moist and get to a dentist as soon as possible. Proper first aid may improve the chance of saving the tooth, but outcomes vary and no home step guarantees reattachment. Do not try to replant a baby tooth.

Key Takeaways

  • For a knocked-out permanent tooth, handle it by the crown only, keep it from drying out and seek dental care promptly—ideally within minutes when possible.
  • Milk, saliva or a tooth-preservation solution are preferred storage options if the tooth cannot be placed back in the socket; prolonged storage in plain tap water is discouraged.
  • Avulsed primary (baby) teeth should not be replanted because of risks to the child and to the developing permanent tooth.
  • Go to a hospital or call 911 for breathing problems, major facial trauma, uncontrolled bleeding or loss of consciousness—even if a tooth is also missing.

First minutes after a permanent tooth is knocked out

A knocked-out tooth is called an avulsed tooth. The American Association of Endodontists advises acting quickly and seeing a dentist or endodontist as soon as possible, ideally within about 30 minutes, while noting that a tooth may still be saveable after a longer time outside the mouth if it has been handled and stored carefully.

In the first minutes:

  1. Stay as calm as you can and locate the tooth immediately.
  2. Confirm it is likely a permanent tooth. Permanent front teeth in school-age children and adults are the usual candidates for emergency replantation attempts. If you are unsure, still keep the tooth moist and seek care at once rather than delaying.
  3. Pick the tooth up by the crown—the chewing or visible white portion—not by the root.
  4. If the tooth is dirty, rinse it gently with milk or saline if available. Do not scrub the root, do not use soap and do not wrap the tooth in tissue to “dry it off.”
  5. If you can, try to place the permanent tooth back in its socket the right way around, then hold it in place by biting gently on clean gauze or a clean cloth.
  6. Get to a dentist immediately. Call ahead so the office knows you are coming with an avulsed tooth.

These steps are first aid, not a complete treatment. Even when the tooth goes back into place at the scene, a dentist still needs to assess position, stabilize the tooth when indicated and plan follow-up.

If the injured person is unconscious, confused or unable to cooperate safely, do not attempt replantation in the mouth. Keep the tooth moist and seek emergency medical care for the person first.

How to handle and store the tooth

Root-surface cells needed for healing are fragile. Touching, scraping or letting the root dry out reduces the chance of favourable healing.

Handling rules:

  • Hold only the crown.
  • Avoid scraping away attached soft tissue on the root.
  • Do not let the tooth dry on a counter, in a tissue or in a pocket.

If you cannot replant the permanent tooth:

Keep it moist at all times while travelling to care. Preferred practical options commonly recommended by dental trauma guidance include:

  • cold milk;
  • the person’s saliva (for example, in a clean container after spitting, or carefully held in the cheek only if there is no risk of swallowing the tooth—especially important with children);
  • an emergency tooth-preservation kit or balanced salt solution when one is available;
  • saline when milk is not available.

The American Association of Endodontists advises against prolonged storage in regular tap water because root-surface cells tolerate it poorly. Bring the tooth even if damaged, and bring fragments if you find them safely.

Baby teeth versus permanent teeth

Primary (baby) teeth and permanent teeth are managed differently after avulsion.

Do not replant a baby tooth. The American Academy of Pediatric Dentistry and International Association of Dental Traumatology guidance advise against replanting avulsed primary teeth. Reasons include the risk of damaging the developing permanent tooth underneath, the treatment burden for a young child and the risk of the child inhaling or swallowing the tooth.

If a baby tooth is knocked out:

  • control bleeding with gentle pressure using clean gauze;
  • find the tooth so you know it was not inhaled, but do not put it back;
  • contact a dentist promptly for examination;
  • seek emergency medical care if breathing is affected, bleeding is severe or a significant head or facial injury occurred.

Permanent teeth are the teeth for which emergency replantation is generally considered. In mixed dentition—when a child has both baby and permanent teeth—identifying which tooth was lost matters. If you cannot tell, keep any recovered tooth moist, do not force a tooth into a socket that does not clearly match and get professional help immediately.

When hospital care may be needed

A knocked-out tooth is a dental urgency. It becomes a medical emergency when broader injuries or red-flag symptoms are present.

Seek 911 or hospital emergency care first if there is:

  • difficulty breathing or noisy breathing after facial trauma;
  • uncontrolled bleeding from the mouth or face;
  • suspected jaw fracture, major facial lacerations or heavy impact to the head;
  • loss of consciousness, repeated vomiting, confusion or other signs of head injury;
  • an inability to close the mouth or manage secretions;
  • a tooth that may have been inhaled, especially in a young child who is coughing, choking or in respiratory distress.

Emergency departments can address life-threatening issues and significant trauma. They may not complete specialized dental replantation in every setting. If the person is medically stable and the main problem is an isolated avulsed permanent tooth, rapid dental contact is usually the priority. When major trauma and an avulsed tooth both exist, medical stabilization comes first while the tooth is kept moist for dental follow-up.

Never delay airway or bleeding care to search endlessly for a tooth.

What happens after you reach a dentist

Once you reach dental care, the dentist will assess the tooth, the socket, neighbouring teeth and soft tissues. Imaging may be used to check position and related injuries. If replantation is appropriate and possible, the dentist may reposition the tooth and stabilize it with a flexible splint for a period of time.

Follow-up is a required part of care, not an optional extra. Depending on root development and injury details, later treatment such as root canal therapy may be needed for some permanent teeth. The dentist will also check neighbouring teeth that absorbed trauma even if they were not knocked out.

Outcomes vary. A tooth may be retained, develop later complications or still be lost despite appropriate care. No first-aid sequence can promise a specific result. Ask which symptoms should trigger an earlier return visit, how to clean around any splint and when contact sports should pause.

For local urgent dental contact pathways, see Landmark Dental Care’s emergency dentistry page.

FAQ

Should I put a knocked-out tooth back in myself?

If it is a permanent tooth, you are confident of the correct orientation and the person can cooperate, gently replanting it and holding it in place on the way to the dentist is often recommended. Do not replant a baby tooth. If you are unsure, keep the tooth moist and get professional care immediately.

What if I cannot find the tooth?

Still seek prompt dental or medical assessment, especially after trauma. The dentist needs to evaluate the socket and nearby teeth. Search the area carefully, but do not delay care for breathing problems, heavy bleeding or head injury.

Is milk really better than water for storing a tooth?

Dental trauma guidance generally prefers milk, saliva or specialized preservation solutions over prolonged storage in tap water because water is harder on root-surface cells. The most important goals are keeping the tooth moist and reaching care quickly.

Next step

If a permanent tooth has been knocked out and there are no medical red flags, call for emergency dentistry in Truro at 902-893-2919 right away and bring the tooth stored moist. For breathing difficulty, uncontrolled bleeding, major facial trauma or possible head injury, call 911 or go to the nearest emergency department.

References

This article provides general educational information and is not a diagnosis or a substitute for care from a dentist, physician or emergency services. If you think you have a medical emergency, call 911 or go to the nearest emergency department.