A knocked-out adult tooth has the highest chance of long-term survival when re-implanted within 30 minutes. Here is exactly what to do - and what NOT to do.
The first 5 minutes - what to do right now
- Find the tooth. Look around the area where the trauma happened.
- Hold it by the white crown - do not touch the root. The root surface holds living ligament cells that re-attach to your bone if kept alive.
- If dirty, rinse for 5-10 seconds in milk or saline (not tap water - the chlorinated environment damages root cells).
- Re-insert into the socket if you can. Have the patient bite on a clean cloth or gauze to hold it. This is by far the best storage medium.
- If you cannot re-insert, place the tooth in milk, the patient's saliva (between cheek and gum), or in saline. Whole milk is best because its pH and osmolality preserve root cells longest.
- Call us or go to the ER immediately.
Why the 30-minute window matters
The periodontal ligament (PDL) cells on the root surface are what allow your bone to re-attach to a re-implanted tooth. Outside the body, those cells start dying within 5 minutes if dry, and within ~30 minutes even if moist. After 60 minutes of dry time, re-implantation is rarely successful - the body treats the tooth as foreign and slowly resorbs the root over the following years.
Our emergency protocol prioritizes time over everything: we move you to the front of the schedule the moment you call. Re-implantation, splinting to neighboring teeth, and a follow-up root canal at 7-14 days is the standard sequence.
What dentists do during the emergency visit
- Numb the area with local anesthesia (the trauma may have already dulled sensation).
- Clean and gently irrigate the socket - usually a quick saline rinse to remove blood clot and debris.
- Re-insert the tooth in proper position - confirmed with a digital X-ray.
- Splint to neighboring teeth with a flexible composite splint that lasts 7-14 days.
- Tetanus update if your last booster was over 5 years ago and the injury was outdoor/dirty.
- Schedule a root canal at 7-14 days; nearly all re-implanted teeth need one because the nerve has been severed.
Long-term success rates are 70-90% when re-implantation happens within 30 minutes, dropping to under 50% beyond an hour of dry time.
What NOT to do
- Do not scrub the root. This destroys the very cells we need.
- Do not store the tooth in tap water. The hypotonic environment causes the cells to swell and lyse.
- Do not wrap the tooth in dry tissue. A 5-minute dry period is already harmful.
- Do not let the patient eat or drink hot/cold things before evaluation.
- Do not delay calling for "tomorrow." Every minute counts.
- Do not re-implant a baby tooth. Risk to the developing permanent tooth bud above.
Long-term care after re-implantation
Even with a perfect 5-minute re-implant, the tooth needs follow-up care:
- Soft diet for 1-2 weeks while the splint is in place.
- Excellent hygiene around the splint - chlorhexidine rinse usually prescribed.
- A root canal at 7-14 days to prevent root resorption.
- Follow-up X-rays at 1, 3, 6, and 12 months to monitor for resorption.
- Mouthguard for sports going forward to prevent re-injury - see our mouthguard guide.
Many re-implanted teeth function normally for 10-30+ years. Even when long-term loss occurs, having the tooth in place during adolescence preserves bone for a future implant.
Frequently asked questions
- My child knocked out a baby tooth - should I bring it in?
- Yes, but baby teeth are NOT re-implanted. Bring it in (or a photo) so we can confirm it is fully out and check the developing adult tooth above for any damage. Most babies do fine - just don't try to re-insert it.
- I can't find the tooth - what should I do?
- Come in anyway. We need to take an X-ray to confirm the tooth is not swallowed, inhaled into the lungs (rare but serious), or driven up into the gum tissue (intrusion). We also evaluate the socket and surrounding teeth.
- Can I take pain medication before coming in?
- Yes - ibuprofen and acetaminophen are both safe to take. Avoid aspirin in the 24 hours before any potential surgical care. Tell us what you took and when so we can plan additional analgesia.
- Will insurance cover emergency tooth re-implantation?
- Most dental plans cover emergency exams and surgical care; the splint and follow-up root canal are usually covered. We submit on your behalf at the visit.