Avulsed Tooth: The Dental Emergency Where Minutes Matter — and How to Save Your Knocked-Out Tooth

Medically reviewed by Dr. Baraa Alnahhal, MD. Last reviewed October 13, 2026. This content is for educational purposes and is not medical advice.

Quick Answer

An avulsed tooth is a tooth knocked completely out of its socket, a dental emergency most common in kids ages 7 to 11. Put the tooth back in the socket right away, handling it only by the crown. Teeth replanted within 30 minutes to one hour have the best chance. Otherwise store it in milk and see a dentist immediately.

What the research says

• Emergency care really does shape the outcome. The International Association of Dental Traumatology calls avulsion of permanent teeth one of the most serious dental injuries and says prompt, correct emergency management is essential for the best outcome. Its guidelines reflect the best available evidence plus expert consensus where the data are inconclusive, and the association stresses that no guideline can guarantee a favorable outcome (Fouad et al., Dental Traumatology, 2020).

• Even a replanted tooth often has an uncertain future. In a German retrospective study of 36 patients and 49 replanted permanent teeth followed for an average of 3.5 years, only 26.5% (13 of 49) showed functional healing. Replacement resorption affected 51.0% (25 of 49), and 6 of those 25 teeth were eventually lost. Inflammatory resorption affected 22.5% (11 of 49), and every one of those teeth was lost early (average 1.7 years). The authors concluded that avulsion remains a severe injury with an unpredictable prognosis (Müller et al., Scientific Reports, 2020).

• Replanting can still be worthwhile for a child, even when it is delayed. In a series of 15 incisors in 9 children aged 8 to 12 that were replanted late, after unfavorable storage, 40% were retained for at least 3 years. Replacement root resorption was the most common complication (9 teeth, 60%). The authors argued that even delayed replantation is worthwhile for a child's jaw and facial development (Demir et al., Nigerian Journal of Clinical Practice, 2020).

What Is an Avulsed Tooth?

An avulsed tooth, sometimes called a knocked-out tooth, is a tooth that's been knocked out of its socket and, often, out of your mouth. Healthcare providers may call this dental avulsion. Avulsed teeth are a type of dental trauma and require immediate treatment. The difference between keeping your tooth and losing it permanently often comes down to what you do in the first hour.

How Common Are Knocked-Out Teeth?

It's a common issue. Every year, more than 5 million people in the U.S. have their teeth knocked out. Most avulsed teeth involve the incisors, the teeth at the front of your mouth in your upper and lower jaw. While anyone can have a tooth knocked from their mouth, this issue mostly occurs in kids ages 7 to 11.

What Are the Symptoms of an Avulsed Tooth?

Symptoms of a tooth avulsion may include:

• A gap in your mouth where your tooth used to be.

• Mouth pain.

• Bleeding.

What Causes a Tooth to Be Knocked Out?

It takes a lot of force to knock a tooth out of your mouth. The most common ways tooth avulsion happens are:

Is an Avulsed Tooth a Dental Emergency?

Yes. Avulsed teeth are dental emergencies and require immediate treatment. To save your tooth, try reinserting (replanting) it right away. Teeth treated within 30 minutes to one hour have the best chance of success.

What Should I Do If a Tooth Is Knocked Out?

Follow these steps in order:

1. Pick up your tooth by the crown, the white chewing surface. Never hold the root.

2. Rinse your tooth with water or milk to remove any dirt. Avoid using soap, and don't scrub or dry the tooth.

3. Gently place your tooth back into the socket, root first. Hold your tooth by the crown and avoid touching the root.

4. Bite on a napkin, gauze, or handkerchief to anchor your tooth in place.

5. Contact a dentist for an emergency appointment so they can check your tooth.

What If I Can't Get the Tooth Back In?

If you can't reinsert your tooth, store it in milk (not water) until you can see a dentist. Milk is the best protection. But you can also store your tooth in your cheek, tucked against your gum or under your tongue. Saliva pooling in your cheek or under your tongue will keep your tooth wet.

Why Milk and Not Water?

Milk has the best combination of proteins and antibacterial protection to protect your tooth until it's replaced in its socket.

How Do Dentists Treat an Avulsed Tooth?

If you put your tooth into its socket, your dentist will make sure the tooth is in the right position. They'll place a splint on your tooth to anchor it to your surrounding teeth. They'll follow the same process if they need to reinsert your tooth. They may schedule a root canal if your tooth avulsion leads to an infection in your tooth pulp, the soft tissue inside the tooth.

How Is an Avulsed Tooth Diagnosed?

That depends on your situation. If you can place your tooth in its socket, a healthcare provider may check the tooth and then begin treatment. If you bring your tooth to the provider, they may examine your mouth for any other injury before replacing your tooth in its socket. They'll ask what happened. For example, if your tooth was knocked from your mouth in a hard fall, they may check for signs of head injury, like a concussion.

How Do I Care for My Tooth After It's Reinserted?

To help protect your tooth after reinsertion, you should:

• Consume only soft food and liquids for two weeks.

• Avoid foods that are too cold or too hot.

• Brush gently with a soft toothbrush after each meal.

• Rinse with an antibacterial chlorhexidine mouthwash two times a day for two weeks.

• Take nonsteroidal anti-inflammatory drugs (NSAIDs) as needed for pain relief.

• Avoid contact sports.

What Are the Complications of Tooth Replantation?

Even successful replantation can come with complications:

What Happens If My Tooth Can't Be Put Back?

If your dentist can't replace your tooth, they may recommend one of the following treatments:

How Long Does a Reinserted Tooth Last?

If you or your dentist reinserts your avulsed tooth, you'll have regular follow-up appointments so your dentist can check on it. You may see your dentist a month after treatment and then every three months for the first year, with annual checkups for the next five years.

A reinserted tooth may stay in place for 10 to 20 years. But the tooth will come loose or fall out at some point during your lifetime. When that happens, you'll need replacement treatment: a partial denture, dental bridge, or dental implant.

Can I Prevent an Avulsed Tooth?

You may not be able to prevent everything that can knock a tooth from its socket, like being hit in the face in an accident or during a fight. But this issue usually happens when people play contact sports where there's a chance they'll be hit in the mouth, like football, basketball, or hockey. If you play those sports, wearing a mouth guard may protect your teeth.

When Should I Call My Dentist After Replantation?

If you have a replanted tooth, you should see your dentist if you experience:

• Bleeding.

• Continued tooth pain.

• Swelling.

• Tooth discoloration.

What Questions Should I Ask My Dentist?

• When will I know if the replantation process is successful?

• Will I need a root canal?

What special situations should you know about with an avulsed tooth?

Special situations with an avulsed tooth include finding only part of the tooth, a knocked-out baby tooth and a tooth that can't be found, and each needs different care.

What If I Only Find Part of My Tooth?

Never try to put only part of your tooth back into the socket. See a dentist as soon as you can. They may take a dental X-ray to look for root damage before treating your tooth.

Should a Baby Tooth Be Replanted?

No, it's not a good idea to reinsert a baby tooth. Reinserting the tooth may lead to issues with the permanent tooth that'll replace the baby tooth.

What If I Can't Find My Tooth?

You may have swallowed or aspirated (breathed in) your tooth. Swallowed teeth are usually harmless. But breathing in a tooth may cause lung infections like aspiration pneumonia. Tell your provider you may have breathed in your tooth. They'll do a chest X-ray to make sure your tooth hasn't gone into your lungs.

Conclusion and next steps

An avulsed tooth is a medical emergency, but one where your quick action can literally save the tooth. If you're hit in the mouth and your tooth is knocked from its socket, your first step is to put it back into its socket. Your second step is contacting a dentist for an emergency appointment or going to the emergency room. Handle the tooth by the crown, not the root. Keep it moist in milk if you can't reinsert it. And get professional care within the 30-minute-to-one-hour window for the best odds.

What is the action plan for saving a knocked-out tooth?

A knocked-out tooth is one of the few medical emergencies where seconds and minutes genuinely change the outcome. Remember the five steps: crown only, rinse with water or milk, root first into the socket, bite down on gauze to anchor, and call the dentist immediately. Can't reinsert it? Milk is your tooth's best friend. And if the tooth belonged to a child and it's a baby tooth, leave it out. The permanent tooth underneath matters more. If your tooth is successfully reinserted, it may stay in place for many years to come, with gentle care, careful follow-up, and a mouth guard when you play contact sports.

Frequently asked questions

What is an avulsed tooth? An avulsed tooth is a tooth that's been knocked out of its socket, often out of the mouth entirely. Providers call it dental avulsion, and it's a dental emergency [1].

How common are knocked-out teeth? Very common. More than 5 million people in the U.S. have a tooth knocked out every year. The front incisors are hit most often, and kids ages 7 to 11 are most affected [1].

Is a knocked-out tooth a dental emergency? Yes. Avulsed teeth are dental emergencies that require immediate treatment. The sooner the tooth is back in the socket, the better the chance of saving it [1].

How long do I have to save a knocked-out tooth? Teeth treated within 30 minutes to one hour have the best chance of success. Act immediately [1].

How do I pick up a knocked-out tooth? Hold it only by the crown, the white chewing surface. Never touch or hold the root [1].

Should I scrub or dry a knocked-out tooth? No. Rinse it gently with water or milk to remove dirt. Avoid soap, and don't scrub or dry the tooth [1].

How do I put a tooth back in the socket? Gently place it back root first, hold it by the crown, then bite on a napkin, gauze, or handkerchief to anchor it. Then contact a dentist for an emergency appointment [1].

What if I can't get the tooth back in the socket? Store the tooth in milk (not water) until you can see a dentist. Milk is the best protection. You can also tuck the tooth in your cheek against your gum or under your tongue, where saliva keeps it moist [1].

Why should I put a knocked-out tooth in milk? Milk has the best combination of proteins and antibacterial protection to keep the tooth healthy until it's replaced in its socket [1].

How does a dentist treat a reinserted tooth? The dentist makes sure the tooth is in the right position and places a splint to anchor it to the surrounding teeth. A root canal may be scheduled if the pulp becomes infected [1].

What should I eat after my tooth is reinserted? Only soft foods and liquids for two weeks, avoiding very cold or hot foods. Brush gently with a soft toothbrush after each meal, rinse twice daily with chlorhexidine mouthwash for two weeks, take NSAIDs for pain as needed, and avoid contact sports [1].

What complications can happen after tooth replantation? Possible complications include ankylosis (the tooth fuses to bone and sinks), apical periodontitis (inflamed tissue around the tooth), inflammatory root resorption (the root breaks down and the tooth loosens), pulp canal obliteration, and pulp necrosis (the tooth pulp dies, requiring a root canal or extraction) [1] [5].

How long does a replanted tooth last? A reinserted tooth may stay in place for 10 to 20 years, but it will eventually loosen or fall out, requiring replacement with a partial denture, dental bridge, or dental implant. Follow-ups happen at one month, every three months for the first year, then annually for five years [1]. Individual outcomes vary, and some studies report earlier tooth loss [5].

Should a knocked-out baby tooth be put back in? No. Reinserting a baby tooth may cause problems with the permanent tooth that will replace it [1].

What if I can't find my knocked-out tooth? You may have swallowed or aspirated (breathed in) the tooth. Swallowed teeth are usually harmless, but breathing in a tooth can cause lung infections like aspiration pneumonia. Tell your provider, who will do a chest X-ray to check your lungs [1].

Related Reading

• What Is Aspiration Pneumonia? A Plain-Language Guide to the Lung Infection That Starts When Something Goes "Down the Wrong Pipe": a lung infection that can follow breathing in a knocked-out tooth.

Trusted External Resources

• Cleveland Clinic. Avulsed Tooth. Cleveland Clinic. Last updated May 16, 2024. https://my.clevelandclinic.org/health/diseases/21579-avulsed-tooth

• American Association of Endodontists. Knocked Out Teeth. American Association of Endodontists. Accessed October 14, 2026. https://www.aae.org/patients/dental-symptoms/knocked-out-teeth/

• Alotaibi S, et al. Avulsed Tooth. In: StatPearls [Internet]. StatPearls Publishing. Last updated March 6, 2023. PMID 30969698. https://www.ncbi.nlm.nih.gov/books/NBK539876/

References

1. Cleveland Clinic. Avulsed Tooth. Cleveland Clinic. Last updated May 16, 2024. https://my.clevelandclinic.org/health/diseases/21579-avulsed-tooth

2. Alotaibi S, et al. Avulsed Tooth. In: StatPearls [Internet]. StatPearls Publishing. Last updated March 6, 2023. PMID 30969698. https://www.ncbi.nlm.nih.gov/books/NBK539876/

3. American Association of Endodontists. Knocked Out Teeth. American Association of Endodontists. Accessed October 14, 2026. https://www.aae.org/patients/dental-symptoms/knocked-out-teeth/

4. Fouad AF, et al. International Association of Dental Traumatology guidelines for the management of traumatic dental injuries: 2. Avulsion of permanent teeth. Dent Traumatol. 2020;36(4):331-342. PMID 32460393. https://doi.org/10.1111/edt.12573

5. Müller DD, et al. Survival and complication analyses of avulsed and replanted permanent teeth. Sci Rep. 2020;10(1):2841. PMID 32071357. https://doi.org/10.1038/s41598-020-59843-1

6. Demir P, et al. Survival of avulsed permanent incisors in children following delayed replantation. Niger J Clin Pract. 2020;23(5):631-637. PMID 32367869. https://doi.org/10.4103/njcp.njcp_496_19

Medical disclaimer

This article is for general informational purposes only and is not a substitute for professional medical or dental advice, diagnosis, or treatment. Always seek the advice of your dentist, physician, or other qualified health provider with any questions you may have regarding a medical or dental condition. Never disregard professional advice or delay seeking it because of something you have read here.