It feels like a disaster and it usually is not one. What matters is the next hour — and knowing which symptoms turn this from an inconvenience into something urgent.
A crown comes off in the middle of dinner and it feels like a disaster. Usually it is not one. What matters is what you do in the next hour, and getting seen within a few days rather than a few months.
Keep it
Do not throw it away. A crown that came off cleanly can often be cleaned and re-cemented, which is far quicker and cheaper than having a new one made.
Rinse it, dry it, and put it somewhere you will not lose it — a small container or a pill box. Not a tissue on the table, which is how most of them end up in the bin.
What not to do
- Do not glue it back with household adhesive. This is the most common and most expensive mistake. Super glue is not made for the mouth, it fills the fitting surface so the crown can no longer seat properly, and it often means the crown has to be cut off and remade — turning a re-cement into a new crown.
- Do not chew on that side. The tooth underneath is usually shaped down to a stub and is much weaker than it looks.
- Do not file or reshape it to make it fit better.
How urgent is it?
| What you notice | How soon |
|---|---|
| No pain, tooth looks intact | Within a few days |
| Sharp twinge with cold or air | Sooner — the dentine underneath is exposed |
| A sharp edge cutting your tongue or cheek | Same day, for comfort |
| Throbbing, swelling, or fever | Urgently. That is infection, not a lost crown |
Holding it over until the appointment
Pharmacies in Korea often stock temporary dental cement. Ask for 임시 치과용 접착제 — imsi chikwayong jeopchakje. It is designed to hold a crown for a day or two, not to repair anything, and a dentist will remove it before re-cementing properly.
If you cannot get the crown seated, leave it out rather than forcing it. A crown sitting at the wrong angle can damage the tooth underneath. Keep the area clean, rinse after eating, and stay off that side.
Why it came off decides what happens next
This is the part that determines your appointment, and it is why nobody can price it over the phone:
- The cement washed out. The best case. If the crown and the tooth underneath are both sound, it is often a re-cement.
- Decay underneath. The most common reason. The tooth has changed shape, so the old crown no longer fits it — the decay has to come out and a new crown is usually made.
- The tooth or post fractured. This can mean a post, root canal treatment, or in some cases the tooth cannot be kept.
- Not much tooth left to hold it. A short or heavily prepared tooth gives the cement little to grip, and it may come off repeatedly until the underlying problem is addressed.
An X-ray settles this in minutes. Guessing does not.
If the work was done in another country
This part matters more for foreign residents than anyone else.
Korean dentists work on crowns made abroad routinely — there is nothing exotic about it. But two practical things are worth raising before treatment rather than after:
- Bring what you know. When it was done, what material, and any records or images you have. It will not always change the plan, but it sometimes does.
- A replacement made here may not match its neighbours exactly. Shades and materials vary between labs and countries. If the tooth is visible when you smile, say so at the consultation — matching a single crown to existing work is a different job from making two side by side.
Ask for an itemised written estimate. Re-cementing an intact crown and making a new one are very different amounts of work, and you should be able to see which one you are being quoted for.
Lost fillings are different
A filling that falls out cannot be put back — the piece is not reusable, so there is no point keeping it. The cavity underneath is now open, which is why it often becomes sensitive quickly.
It is usually less urgent than a lost crown, but it does not resolve on its own. Keep the area clean and get it seen before the exposed part decays further.
At Seoul Lab Dental: bring the crown with you if you still have it. We take an X-ray first to see what is under it, tell you whether it can be re-cemented or needs remaking, and put the cost in writing before anything is done — explained in English.
Frequently asked questions
Can I glue a crown back on myself?
Not with household adhesive. Super glue is not made for use in the mouth, and it fills the fitting surface so the crown can no longer seat correctly — which often means it has to be cut off and remade, turning a simple re-cement into a new crown. Temporary dental cement sold at pharmacies (임시 치과용 접착제) is designed to hold a crown for a day or two until you are seen.
How urgent is a crown that fell out?
If there is no pain and the tooth looks intact, within a few days is usually fine. Sharp sensitivity to cold or air means sooner, because the dentine underneath is exposed. Throbbing, swelling or fever is urgent — that indicates infection rather than a lost crown, and it needs treating quickly.
Can the same crown be put back?
Often, yes — if the cement simply washed out and both the crown and the tooth underneath are sound. But decay under the crown is the most common reason they come off, and in that case the tooth has changed shape and a new crown is usually needed. An X-ray answers this in minutes; nobody can tell you over the phone.
Will a Korean dentist work on a crown made in another country?
Yes, routinely. Bring what you know about it — when it was done and what material, if you have records. One practical point: a replacement made here may not match a neighbouring crown made elsewhere, because shades and materials vary between labs and countries. If the tooth shows when you smile, raise it at the consultation rather than afterwards.
What if a filling falls out instead?
A filling cannot be re-cemented, so there is no point keeping the piece. It is usually less urgent than a lost crown, but the cavity underneath is now open and often becomes sensitive quickly. Keep the area clean and have it seen before the exposed part decays further.
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