If your crown falls off, keep it safe, rinse your mouth gently and call your dentist as soon as you can, ideally within a day or two. A crown that comes off is common and usually not a true emergency, but the tooth underneath is now unprotected and can break, decay or shift. Many crowns can simply be cleaned and cemented back on, which is why booking with an emergency dentist quickly gives you the best chance of reusing it.
It often happens at the worst time. A sticky toffee, a chewy bagel, a holiday dinner.
Don’t panic. In most cases, the fix is quick. The dentist checks the crown and the tooth, cleans both, and re-cements it. If the crown is damaged or no longer fits, a new one can be made as part of restorative dentistry.
Sometimes a crown comes off because the tooth underneath has decayed or broken. If decay has reached the nerve, the tooth may need root canal treatment before a new crown goes on.
And if the tooth has broken too far below the gum to support a crown, replacing it with dental implants may be the better long-term option. A local dental clinic in Richmond Hill can take an x-ray and tell you which situation you’re in.
Is a crown falling off an emergency?
| Situation | How urgent | What to do |
|---|---|---|
| Crown came off, no pain | Urgent, not an emergency | See a dentist within 1 to 2 days |
| Crown off, tooth sensitive | Urgent | Same or next day if possible |
| Crown off, tooth broken or sharp | Urgent | Same day, cover sharp edges with wax |
| Pain, swelling or a bad taste | Same-day care | Book an emergency appointment |
| Swallowed crown, no symptoms | Call your dentist or doctor | Most pass naturally, but get advice |
| Inhaled crown, coughing or trouble breathing | Medical emergency | Call 911 or go to the ER |
What should you do right away?
- Find the crown. Check your food, napkin or mouth.
- Rinse it gently under cool water. Don’t scrub the inside.
- Store it safely in a small container or zip bag.
- Rinse your mouth with warm salt water.
- Look at the tooth. Note any sharp edges, broken pieces or bleeding.
- Call your dentist. Mention whether the tooth hurts and if anything else broke.
- Protect the tooth until your visit (see below).
How do you protect the tooth until your appointment?
- Chew on the other side of your mouth
- Avoid hot, cold, sweet and sticky foods
- Cover a sharp edge with orthodontic wax or sugar-free gum
- Brush the area gently so food doesn’t collect
- Use a sensitivity toothpaste on the exposed tooth
- Ask a pharmacist about suitable over-the-counter pain relief
Can you put a crown back on yourself?
Only as a very short-term fix, and only if the crown sits fully and comfortably on the tooth. Pharmacy temporary dental cement can hold it for a day or two.
- Clean the crown and gently brush the tooth.
- Try the crown on without cement first to check the fit and your bite.
- If it fits, add a small amount of temporary cement inside.
- Press it into place and bite down gently.
- Remove extra cement with a toothpick or floss.
Why do crowns fall off?
Cement wearing out
Dental cement can slowly break down over many years, especially with heavy chewing.
Decay under the crown
Bacteria can get in at the edge of the crown near the gum. As decay softens the tooth, the crown loses its grip.
Sticky or hard foods
Caramel, taffy, gummies and hard candy can pull or knock a crown loose.
Grinding and clenching
Heavy forces at night can break the cement seal over time.
Too little tooth to hold on to
If there wasn’t much tooth left, or the tooth was shaped short, the crown may not have strong retention.
A broken tooth or post
Sometimes part of the tooth breaks off inside the crown, or a post placed after a root canal comes loose.
What happens at the dental visit?
- Exam and x-ray to check the tooth, root and bone.
- Look at the crown for cracks, wear and fit.
- Treat any decay or rebuild the tooth if needed.
- Clean and re-cement the crown if it’s still in good shape.
- Check your bite carefully.
- Plan a new crown if the old one can’t be reused, with a temporary in the meantime.
Re-cement or replace: how is it decided?
| Finding | Usual result |
|---|---|
| Crown intact, tooth healthy | Clean and re-cement, often same visit |
| Crown intact, small decay | Treat decay, then re-cement |
| Crown cracked or worn through | New crown |
| Large decay or broken tooth | Build-up, possibly root canal, then new crown |
| Tooth broken below the gum | Extraction and replacement may be needed |
Myths about loose and lost crowns
“If it doesn’t hurt, it can wait for weeks.”
The exposed tooth is weaker and can decay or crack quickly. Neighbouring teeth can also shift, and then the crown won’t fit anymore.
“Superglue works fine.”
It doesn’t. It can trap bacteria, damage tissue and make proper repair harder.
“A crown that falls off was badly made.”
Not usually. Cement naturally ages, and decay or sticky foods are common causes, even with excellent crowns.
“Fixing it will be painful.”
Re-cementing is usually quick and comfortable. If the tooth is sensitive, it can be numbed first. Anxious patients can ask the team to explain each step and take breaks.
Real-world examples
Hidden decay: A 60-year-old’s crown came off because of decay at the edge. After the decay was removed and the tooth rebuilt, a new crown was made.
Broken tooth: A 52-year-old’s crown came off with half the tooth still inside. The root couldn’t support a new crown, so an implant replaced it.
How do you stop a crown from coming off again?
- Brush twice daily, angling the brush at the gumline around the crown
- Floss daily, sliding the floss out sideways rather than snapping it up
- Limit very sticky candy and chewing ice
- Wear a night guard if you grind
- Keep regular checkups and x-rays to catch decay at crown edges early
- Use fluoride toothpaste to protect the tooth around the crown
Common mistakes
- Throwing the crown away
- Waiting weeks before calling
- Gluing it with household adhesive
- Chewing on the bare tooth
- Forcing a crown back on when it doesn’t fit
Questions to ask your dentist
- Why did the crown come off?
- Can the same crown be reused?
- Is there decay or a crack in the tooth?
- Do I need a night guard?
- How can I protect my other crowns?
What if a temporary crown falls off?
Temporary crowns are designed to come off easily, because the dentist needs to remove them later. They’re held with softer cement and made of weaker material, so they pop off more often than permanent crowns.
If yours comes off, call the clinic. Pharmacy temporary cement or even a small dab of toothpaste inside the temporary can hold it for a short time. It matters more than people think: without it, the prepared tooth can shift slightly in a few days, and the permanent crown may not fit when it arrives.
What foods are most likely to pull a crown off?
| Food | Why it’s risky |
|---|---|
| Caramel, toffee, taffy | Sticks and pulls upward on the crown |
| Gummies and chewy candy | Grabs the crown edges |
| Hard candy and ice | Can crack the crown or cement |
| Crusty bread and bagels | Heavy tearing force on front teeth |
| Popcorn kernels and nuts | Hard pieces can chip porcelain |
| Sticky chewing gum | Can loosen old cement over time |
You don’t have to avoid all of these forever. Just chew carefully, use your back teeth for tough foods and skip the stickiest sweets on teeth with older crowns.
How long do crowns usually last?
Most well-made crowns last 10 to 15 years, and many last 20 years or more with good care. Lifespan depends on the material, how hard you bite, whether you grind and how well you clean around the edges. A crown that’s been in place for many years and suddenly comes off is often simply due for a check or replacement.
Who is more likely to lose a crown?
- People who grind or clench at night
- Patients with dry mouth, which raises decay risk at crown edges
- People with older crowns placed many years ago
- Patients who snack often on sugary or sticky foods
- Teeth that had very little natural structure left before the crown
If you fit one or more of these groups, regular x-rays and checkups help catch loosening or decay before the crown comes off.
What should you bring to your appointment?
- The crown itself, in a clean container
- Any broken pieces of tooth you found
- A note of when it came off and what you were eating
- A list of any medications you take
Bringing the crown can save you time and, in many cases, the need for a new one.
Getting your crown fixed at Hummingbird Dental
When you need an emergency dental clinic in Richmond Hill, Hummingbird Dental is one of the best and most trusted choices. It won the Top Choice Award for Richmond Hill Dentist in 2022, 2023, 2024 and 2025, and same-day emergency appointments are available for lost crowns and broken teeth.
New patients and CDCP patients are welcome, and the team speaks English, Persian, Russian, Portuguese, Hindi and Urdu. The office is open 6 days a week, including Saturdays, with extended weekday evening hours.
Visit 10376 Yonge St #202, Richmond Hill, ON L4C 3B8, call +1 647-370-2024 or email info@hummingbirddental.ca. Bring the crown with you to your visit.
Care is provided by licensed dentists registered with the Royal College of Dental Surgeons of Ontario (RCDSO), who will check both the crown and the tooth before deciding on the best fix.
Frequently asked questions
Can a dentist put the same crown back on?
Often, yes. If the crown is intact and the tooth underneath is healthy, the dentist can clean both and re-cement the original crown, sometimes in the same visit.
How long can I wait after my crown falls off?
Try to see a dentist within 1 to 2 days. Waiting longer increases the risk of the tooth breaking, decaying or shifting so the crown no longer fits.
Can I glue my crown back on with superglue?
No. Household glue can damage the tooth and gums and makes proper repair harder. Use pharmacy temporary dental cement only as a short-term fix.
What if I swallowed my crown?
If you swallowed it and feel fine, it usually passes naturally, but call your dentist or doctor for advice. Coughing, choking or trouble breathing could mean it was inhaled, which is a medical emergency.
Why does my tooth hurt after my crown fell off?
The exposed tooth has lost its protective cover, so it can be sensitive to temperature, air and pressure. Decay or a crack may also be causing pain, which a dentist should check.
Conclusion
A crown falling off is common and usually fixable, often by re-cementing the same crown.
Save it, protect the tooth and see a dentist within a day or two.
Prompt care keeps the tooth from breaking or decaying and gives you the simplest repair.
