Toddlers fall, and the front teeth take the hit. Dental injuries are very common in early childhood, peaking around the ages when children are learning to walk and run. If a baby (primary) tooth is completely knocked out, the most important thing to know is the opposite of the advice for an adult tooth: do not try to put a baby tooth back in. The International Association of Dental Traumatology and paediatric dental bodies advise against replanting an avulsed baby tooth, because of the risk to the developing adult tooth underneath.
Key takeaways
- Do not replant a knocked-out baby tooth. Pushing it back can damage the developing adult tooth beneath the gum.
- This is the key difference from an adult tooth, which should be replanted quickly. Knowing which tooth it is matters.
- Control bleeding with gentle pressure, comfort your child, and see a dentist promptly to check for other injuries.
- Find the tooth if you can, to be sure it is out rather than pushed up into the gum, which needs assessment.
- Watch for swelling, fever, a darkening tooth nearby, or pain over the following days and weeks.
The one rule: never put a baby tooth back in
For an adult tooth, every minute counts and replanting it fast gives the best chance of saving it. For a baby tooth, the rule is the reverse. The roots of baby teeth sit very close to the buds of the permanent teeth forming in the jaw. Forcing a knocked-out baby tooth back into the socket can disturb or infect that developing adult tooth, leading to problems with its colour, shape or eruption later. So if you are sure it is a baby tooth, do not replant it. If you are not sure whether it is a baby or adult tooth, do not push it in, keep it moist in milk, and ring a dentist straight away for advice.
First aid, step by step
Step 1: Stay calm and comfort your child
A mouth injury is frightening and bleeds dramatically even when minor. Reassure your child first.
Step 2: Control the bleeding
Have your child bite gently on a clean, damp gauze or cloth over the socket for around 10 minutes. A cold compress on the lip or cheek helps swelling.
Step 3: Find the tooth
Locate the tooth if you can. This confirms it is fully out rather than knocked up into the gum (an intrusion), which looks like a missing tooth but needs different assessment. Do not clean or store it for replanting; bring it along if helpful, but it will not be put back.
Step 4: See a dentist promptly
Ring your dentist the same day. They will check for other damage such as a fractured or intruded tooth, injuries to nearby teeth, and any cuts that need attention, and advise on pain relief and diet.
What about the gap?
Losing a single front baby tooth early usually does not cause major problems with spacing, because the front teeth are not the main space-holders. Your dentist will assess whether anything needs to be done. Lost back baby teeth are more likely to need a space maintainer, which the article on space maintainers for children explains.
What to watch for afterwards
Most children heal well, but keep an eye out over the days and weeks for signs the area needs review: increasing swelling, a pimple-like spot on the gum, fever, a nearby tooth turning grey or dark, or ongoing pain. A neighbouring tooth that was knocked but not lost can darken over time, which is worth showing your dentist. Soft foods and gentle brushing around the area help healing.
Adult tooth vs baby tooth: a quick contrast
| Situation | Baby (primary) tooth | Adult (permanent) tooth |
|---|---|---|
| Put it back in? | No, never replant | Yes, replant quickly if possible |
| Urgency | See a dentist same day | Replant within minutes, then dentist immediately |
| Store the tooth in milk? | Only if unsure which tooth it is | Yes, if it cannot be replanted right away |
Frequently asked questions
Should I put my child knocked-out baby tooth back in?
No. Replanting a baby tooth can damage the developing adult tooth underneath. This is the opposite of the advice for an adult tooth.
Will the adult tooth still come through normally?
Usually yes. Most adult teeth erupt normally after a baby tooth is lost early, though sometimes there is a slight delay or a colour or shape change, which is why follow-up matters.
Is a knocked-out baby tooth an emergency?
It needs same-day dental assessment to check for other injuries, but it is not an emergency in the sense of needing the tooth replanted. Severe bleeding, swelling or a head injury needs urgent medical care.
How do I know if it is a baby or adult tooth?
Age is the main clue. Children usually start losing baby teeth around age 6, so in a toddler it is almost certainly a baby tooth. If unsure, do not replant and call a dentist.
What if the tooth was pushed up into the gum instead?
An intruded tooth looks missing but is pushed into the gum. It needs dental assessment, as the dentist will decide whether to leave it to re-erupt or intervene.
If your child has had a mouth injury, the team at Lumi Dental in Melrose Park can check it the same day. Related reading: teething in babies, space maintainers for children, when do baby teeth fall out, and natal and neonatal teeth.
This article is general first-aid information, not a substitute for seeing a dentist or doctor. For a serious facial or head injury, seek urgent medical care.
