Yes, it can. And it does, more often than most patients expect. A crown coming loose or falling off entirely is one of the more common dental emergencies we see. It’s rarely dangerous, but it does need attention, and what you do in the first few hours matters.
Why Do Crowns Fall Off?
Cement failure is the most common reason. Dental crowns are held in place with specialised dental cement, and that cement (like most materials in the mouth) has a finite lifespan. Over years of temperature changes, biting forces, and exposure to saliva, the bond can weaken. Some crowns that have been in place for a decade or more come off with surprisingly little provocation, pulled off by a chewy or sticky food.
But cement failure isn’t the only cause. Decay underneath the crown can erode the tooth structure that the crown is anchored to, leaving it with less to grip. A crown fitted on a tooth that’s been significantly reduced due to decay may not have had a great foundation to begin with. And in some cases, the original cementation wasn’t quite right, meaning the crown was never as secure as it should have been.
Trauma plays a role too. A knock to the face, biting something unexpectedly hard, or even an aggressive brush of a loose crown with a firm toothbrush can dislodge it. Some patients grind their teeth and have no idea, slowly working their crowns loose over time.
What to Do Immediately
First: don’t panic. A crown coming off is rarely a dental emergency in the urgent, painful sense. But it does need to be dealt with reasonably promptly, ideally within a few days.
Here’s what to do straight away:
- Find the crown and keep it. You’ll need to bring it to your appointment. Rinse it gently with water, don’t scrub it.
- Check the tooth that’s been exposed. Run your tongue around it carefully. Is it painful? Sharp? Does it feel like there’s significant tooth structure remaining?
- Keep the crown somewhere safe, a small zip-lock bag or a clean container works well.
- Avoid chewing on that side of your mouth until it’s been seen to.
That said, there are situations where you should call your dentist the same day rather than waiting for a routine slot.
When to Call Urgently
Not every fallen crown is a same-day problem. But some are. Call your dentist urgently if:
- The exposed tooth is causing significant pain, particularly to cold air or temperature.
- The tooth underneath has fractured or broken and you can see or feel a sharp edge.
- You’ve swallowed the crown or think you might have inhaled it. A swallowed crown is usually fine, it’ll pass. An inhaled one is a medical issue, not a dental one, and needs immediate attention.
- The tooth is so sensitive that you can’t function normally.
In most cases though, a fallen crown is an inconvenience rather than an emergency. The tooth underneath has usually been shaped and may have a post inside it, meaning it’s reasonably stable even without the crown on top.
Can You Reattach It Temporarily at Home?
Here’s the thing. There are over-the-counter dental cement products available in pharmacies, and they do work as a short-term measure. If you genuinely can’t get to a dentist for several days, using a temporary dental cement (like Dentemp or similar) to hold the crown in place is better than leaving the tooth exposed. Follow the instructions carefully, make sure the tooth and crown are dry before applying, and don’t eat for at least an hour afterwards.
What you shouldn’t do is use superglue. It sounds like a logical fix. It isn’t. Superglue is not safe for use in the mouth, it can damage the tooth surface, and it makes the dentist’s job considerably harder when they try to remove it. We see this occasionally and it’s never helpful.
Temporary home cementation buys you time. It’s not a permanent solution, and you should still see your dentist as soon as possible.
| Situation | Urgency | Action |
|---|---|---|
| Crown off, no pain | Within a few days | Keep crown safe, book appointment |
| Crown off, tooth sensitive | Same day if possible | Temporary cement, call dentist |
| Crown off, significant pain | Urgent | Call dentist immediately |
| Crown swallowed | Non-urgent medically | Inform dentist; usually passes safely |
| Crown potentially inhaled | Medical emergency | Go to A&E immediately |
What Happens at the Dental Appointment?
Your dentist will first examine the tooth and the crown itself. They’ll want to know if the crown is intact (meaning it can potentially be re-cemented) or if it’s damaged. They’ll also look carefully at the prepared tooth underneath. Decay, cracks, and changes to the tooth structure all affect what happens next.
If the tooth is sound and the crown is undamaged, re-cementation is straightforward. The crown is cleaned, the tooth is prepared, and a fresh cement is used. Usually two appointments needed for this. Well, mostly. Actually, a re-cementation is often done in a single visit if no additional work is required.
If there’s decay under the crown, that needs treatment first before any decision about re-cementing or replacing the crown. If the tooth structure has changed significantly, a new crown may be needed. And if the tooth has fractured in a way that can’t be restored, you may be looking at extraction and a discussion about what comes next, whether that’s an implant, a bridge, or something else.
Will the Crown Be Usable Again?
Sometimes. Some patients arrive with a crown that looks exactly as it did when it was fitted, just in their hand rather than on their tooth. In those cases, especially where the crown is relatively new and the tooth is healthy, re-cementation is a perfectly reasonable option.
But crowns that have been out for a while may not fit as well, because teeth can drift slightly over time. Older crowns that were already showing wear before they came off may not be worth re-cementing if they won’t last much longer anyway. Your dentist should give you an honest assessment of whether re-cementing makes practical sense or whether a new crown is a better use of your time and money.
Preventing It Happening Again
Some crown failures are just bad luck, specifically cement that’s reached the end of its life after years of good service. But others are preventable. Avoiding very chewy or sticky foods (toffee, chewing gum, sticky sweets) can reduce the risk. If you grind your teeth, a night guard is genuinely worthwhile and will extend the lifespan of crowns significantly. And regular dental check-ups mean that a crown showing early signs of looseness can be identified before it becomes a problem at an inconvenient moment, like during a meal.
You can read more about looking after your oral health and getting the most from NHS dental services on the NHS Inform page on NHS dental treatment in Scotland.
What Happens to the Tooth While the Crown Is Off?
Good question, and one that doesn’t get asked enough. The short answer is: the tooth is vulnerable, and the longer it’s left exposed, the more risks accumulate.
When a crown is placed, the underlying tooth is prepared, meaning it’s been shaped and reduced so the crown fits over it neatly. That preparation removes the outer enamel layer entirely. What’s left underneath is dentine, which is softer, more porous, and far more sensitive than enamel. Without the crown sitting on top, that dentine is exposed to everything: temperature, food debris, bacteria, biting forces. Not ideal.
Sensitivity is the most immediate issue. Cold drinks, cold air, even breathing in on a particularly sharp Scottish morning can cause a sharp twinge. That’s the dentine reacting to stimuli it’s not designed to handle without protection. In fairness, not every exposed prepared tooth is sensitive. Teeth that have had root canal treatment, for instance, are no longer vital (meaning the nerve has been removed), so sensitivity isn’t a factor. But for a tooth that still has a live nerve, exposure is uncomfortable.
Decay is the bigger concern over the longer term. The prepared tooth surface, stripped of enamel, is more susceptible to decay than an intact tooth would be. Bacteria can get into microscopic gaps between the remaining tooth structure and the gum margin. And if decay gets in under where the crown used to sit, you may return to the dentist needing more work done than a simple re-cementation. That’s the real argument for not leaving a fallen crown unattended for weeks at a time.
There’s also the matter of tooth movement. Teeth don’t stay perfectly fixed in the jaw. They respond to pressure, or the lack of it, and neighbouring and opposing teeth can shift subtly when there’s a gap in the contact pattern. It happens slowly, and a few days won’t cause problems. But a crown left off for months can, in practice, result in the crown no longer fitting correctly when you do go back, meaning a new crown rather than a simple re-cementation.
Worth knowing: if the post inside the tooth (used to anchor the crown when there isn’t sufficient natural tooth) comes away with the crown, that’s a slightly more complex situation. Don’t attempt to push anything back into the tooth yourself. Just bring everything to the appointment and let the dentist assess it properly.
Getting Seen Quickly
If your crown has come off, or if you suspect it’s loose, get in touch with us. Our team offering dental crowns in Dreghorn can assess the situation, advise on whether re-cementation is possible, and get things sorted with as little fuss as possible. StormDental keeps appointment slots available for situations like this. Call us on 01294 218 733 and we’ll get you seen.
