The first 30 minutes after a tooth gets knocked out decide almost everything. Save it well, and there’s a real chance of putting it back. Save it badly, and you’re looking at replacement options instead. If you’re dealing with a knocked out tooth emergency in the UK right now, this guide tells you exactly what to do, in order, in plain language.
The 30-minute rule
An adult tooth that’s been completely knocked out (the dental term is “avulsed”) can sometimes be re-implanted successfully if it gets back into the socket within an hour. The first 30 minutes are by far the best window. After two hours, success rates fall sharply. After several hours, it’s usually too late.
This is one of the few situations in dentistry where speed genuinely outranks everything else. Even before you ring us, get the tooth back in the mouth somehow.
Step by step
- Find the tooth. Pick it up by the crown (the white part you see when you smile), never by the root. The cells on the root surface are what allow re-attachment, and handling them damages them.
- Check it’s intact. If it’s a baby tooth, don’t try to reinsert it, that can damage the developing adult tooth underneath. Adults teeth, on the other hand, you should attempt to replant.
- Rinse gently if it’s dirty. Cold milk is best. Saliva is fine. A very brief rinse under cold water is acceptable if those aren’t available, but no longer than ten seconds.
- Try to reposition it. Slot it back into the socket the right way round and bite down gently on a clean cloth or tissue to hold it in place.
- If you can’t reposition it, store the tooth in milk (full-fat or semi-skimmed, both work). If there’s no milk, hold it inside your cheek between your gum and your teeth. Don’t store it in water, water damages the cells on the root surface.
- Ring a dentist immediately. Tell them it’s a knocked-out tooth, you need to be seen today, ideally within the hour.
That’s it. Six steps. The fewer the better, because every minute counts.
Common mistakes that ruin the chances
We see the same handful of mistakes again and again, and most of them are well-meaning.
- People scrub the root clean. Don’t. The microscopic film of cells on the surface is what allows reattachment, scrubbing them off makes successful re-implantation almost impossible.
- People wrap the tooth in a tissue or store it dry. Drying out kills the periodontal cells within minutes. Always wet, always milk if possible.
- People wait to ring the dentist because they’re not sure if the practice is open. Ring anyway. Out-of-hours messages usually carry an emergency number, and even if they don’t, NHS 111 will direct you to the urgent dental rota.
- People go to A&E first when there’s no head injury. A&E generally doesn’t deal with avulsed teeth, they’ll send you to a dentist. If you’ve taken a heavy blow and there’s any concern about concussion, fractured jaw, or other injuries, A&E is the right first stop, but ring a dentist on the way.
What we do when you arrive
If the tooth has been replanted at the scene, we’ll examine it, clean the area, take an X-ray, and splint the tooth to its neighbours for stability. The splint usually stays on for two weeks, sometimes longer. Root canal treatment is almost always required within a couple of weeks because the nerve doesn’t survive the trauma even if the tooth itself does.
If the tooth comes in stored in milk and hasn’t been replanted yet, we’ll do that ourselves. We’ll examine it for fractures, gently clean it, and slot it back. Same splint, same follow-up.
If the tooth has been out too long or is too damaged, we’ll talk through replacement options. A dental implant is usually the gold standard for a single missing front tooth, although it can’t be placed straight away. There needs to be healing time first.
Storage media compared
| Storage option | How long it preserves cells | Comments |
|---|---|---|
| Milk | Up to 6 hours, optimally 1-2 | Best widely available option, full-fat or semi-skimmed |
| Inside the cheek (saliva) | Up to 1 hour | Risk of swallowing, only suitable for older children and adults |
| Hank’s Balanced Salt Solution | Up to 24 hours | Specialist medium, rarely available outside hospitals |
| Saline (contact lens) | Up to 1 hour | Better than water, worse than milk |
| Water | Less than 30 minutes | Damages cells, last resort only |
| Wrapped in tissue or dry | Minutes | Kills cells quickly, avoid |
What if it’s a baby tooth?
Different rules entirely. Baby teeth that get knocked out should not be reinserted. The risk of damage to the developing adult tooth in the bone above is too high. Keep the area clean, give pain relief if needed, and ring a dentist for advice and follow-up. The adult tooth will come through normally in most cases, often a year or two earlier than its neighbours, but otherwise unaffected.
Children sometimes lose adult teeth too, of course. Once the adult teeth are in, usually around six or seven for the front teeth, the rules go back to the standard avulsion protocol. Speed matters, milk works, ring a dentist.
NHS emergency costs in England
Avulsion treatment in England falls under the NHS banded system. Initial assessment and splinting is Band 1 (£27.90) for the urgent care course. Subsequent root canal treatment for the replanted tooth would fall under Band 2 (£76.60). If the tooth ultimately needs a crown after root canal, that’s Band 3 (£332.10), but charged as part of the same course of treatment, you pay only the highest band, not all three.
For wider context on dental injuries, the Wikipedia article on dental trauma covers the various injury types in clinical detail.
A note on prevention
Actually, this is worth raising. Most knocked-out teeth we see come from sport, especially rugby, hockey, football, martial arts, and boxing. A custom-made mouthguard, properly fitted by a dentist, dramatically reduces the risk of avulsion compared to the boil-and-bite kind. They’re not expensive, they last seasons, and they fit so well you forget you’re wearing one. We make them in the practice and most patients say it’s the best fifty quid or so they’ve spent on their teeth.
For accidental falls, especially in older patients on blood thinners, that’s harder to prevent. Decent lighting, removing trip hazards, and (where appropriate) reviewing balance and bone density help reduce risk overall.
Where to go from here
In our experience, the patients who do best are the ones who keep calm, pop the tooth back in or into milk, and ring straight away. If that’s where you are now, ring our team at Westcliff Dental Practice on 01702 344 500. Tell whoever answers that you’ve had a tooth knocked out, and we’ll get you seen as fast as humanly possible.
