Your crown is sitting in your hand. The underlying tooth is exposed. This feels like an emergency, but it's actually manageable—and whether you need immediate professional help or can wait depends on what you find underneath.
Here's exactly what to do and when.
Temporary Fix Comparison Table: Your Options
| Method | Success Rate | How Long It Lasts | Cost | When to Try | When to Avoid |
|---|---|---|---|---|---|
| Dental cement (at drugstore) | 70% (temporary) | 24-48 hours | $5-15 | Crown intact, tooth intact, no pain | Decayed tooth underneath; tooth is broken |
| Super glue (cyanoacrylate) | 50% (risky) | Several hours | $2-5 | Desperate situation, after-hours | Can damage tooth permanently; not recommended |
| Temporary adhesive from dentist office | 90% (emergency kit) | 24-48 hours | Included with kit | Crown intact, tooth intact, will see dentist soon | Not available if office is closed |
| Do nothing, just store safely | N/A | Indefinite | $0 | Tooth/crown undamaged, you have dentist appointment tomorrow | Exposed tooth uncomfortable or at risk |
| Try to re-insert and bite down on wax | 60% (hold temporary) | Several hours | $0-10 | Crown intact, tooth intact, emergency dental access | Weak bite; crown falls off again |
Is Your Crown an Emergency? Decision Guide
Look at the tooth underneath. Ask yourself:
- Can you see the underlying tooth, or is it covered?
- Is the tooth broken, or is it a stump/preparation?
- Does it hurt?
- Is the crown intact or damaged?
- Can you see a dentist today, tonight, or must you wait until tomorrow?
| Your Situation | Emergency? | Action |
|---|---|---|
| Crown off, tooth underneath looks fine (it's a stump), no pain | NO | Can wait 12-24 hours; try temporary cement if uncomfortable |
| Crown off, exposed tooth looks healthy, mild sensitivity | NO | Call dentist for same-day appointment; temporary cement okay |
| Crown off, tooth underneath is broken or cracked | YES | Need to see dentist ASAP (today if possible) |
| Crown off, severe pain where tooth/root is | YES | Likely an abscess; see dentist TODAY |
| Crown off, tooth is missing or extremely short | NO IMMEDIATE | But you need professional help to plan next steps |
| Crown off, crown itself is broken/cracked | NO IMMEDIATE | Likely needs new crown; not emergency unless tooth is damaged |
| Crown off, exposed tooth is sensitive and you can't function | MINOR EMERGENCY | Needs covering/numbing; see dentist same day |
Step-by-Step: What to Do Right Now
Step 1: Assess the Situation (2 minutes)
Pick up the crown: - Look inside it for the stump of tooth material or cement buildup - Look at the tooth it came from—is it intact underneath? - Is there visible decay or is the tooth broken?
Touch the exposed tooth gently: - Is it sensitive? - Does it hurt? - Is it tender or painful when you touch it?
Step 2: Clean Everything (2 minutes)
The crown: - Rinse it with lukewarm water - Gently remove any debris or loose cement with a soft cloth - Don't scrub aggressively - Store it somewhere safe (not loose in a pocket)
The tooth: - Rinse your mouth gently with lukewarm water - Don't pick at it - Keep it clean but don't obsess
Step 3: Call Your Dentist (1 minute)
What to tell them: - "My crown fell off" - Whether the tooth underneath is intact, broken, or sensitive - Whether you're in pain - What time you're calling (they'll know if it's after-hours)
What to expect: - If the tooth is fine, they may say you can wait until tomorrow or an opening tomorrow - If there's pain or damage, they'll try to fit you in same-day - They may recommend temporary cement or just leaving it off
After-hours? Most dentists have emergency numbers. Use them if: - You're in severe pain - The tooth is broken - It's a front tooth and you have an important event tomorrow
Step 4: Temporary Cementation (if recommended)
If your dentist says it's okay to try temporary cement:
- Gather supplies: drugstore temporary crown cement, wax, and a cloth
- Rinse the crown and tooth one more time
- Fill the inside of the crown lightly with temporary cement (not too much)
- Gently place the crown back on the tooth, biting down slowly
- Bite down evenly and hold for 30 seconds
- Remove excess cement with a cloth
- Don't eat hard/sticky foods for 24 hours
Avoid: - Biting hard on that side (use the opposite side for eating) - Sticky foods (gum, caramel, taffy) - Hard foods (nuts, hard candy, ice) - Extremely hot foods
Crown vs. Tooth Damage: When You Need What
| Situation | What Likely Happened | Action |
|---|---|---|
| Crown came off intact, tooth stump looks perfect | Cement failed (normal wear) | Temporary cement, see dentist for recementation |
| Crown came off, underlying tooth is broken/cracked | Crown failed due to underlying decay or trauma | Likely needs: check tooth viability, possibly root canal, new crown |
| Crown came off, visible dark spot under it | Decay under the crown (very common) | Likely needs: decay removal, filling or new crown |
| Crown came off, tooth is extremely short/worn | Crown preparation was compromised | Likely needs: build-up material, new crown |
| Crown came off, you see pus or smell foul odor | Infection/abscess under crown | Emergency: needs professional evaluation for root canal vs. extraction |
Recementation vs. New Crown: Decision Table
| Scenario | Recementation (Put it back on) | New Crown (Make a new one) |
|---|---|---|
| Crown intact, tooth intact, cement just failed | YES—usually safe | Only if crown looks damaged |
| Crown has visible cracks or chips | NO | YES—need new crown |
| Underlying tooth has decay | NO | YES—cavity needs treatment first |
| Underlying tooth is broken | MAYBE (dentist decides) | LIKELY (depends on extent) |
| Crown came off repeatedly in short time | NO (underlying problem) | YES—likely cement issue needs addressing |
| Crown is over 10 years old and tooth is fine | YES—recement is appropriate | Only if crown is damaged |
Timeline: What to Expect
| Timeframe | What Happens |
|---|---|
| Now to 12 hours | Crown is off; tooth is exposed; you're managing with temporary cement or leaving it off |
| Within 24 hours | Dentist appointment (hopefully); professional assessment of tooth and crown |
| Dentist appointment | If just recementation: 15-30 minutes, immediate relief |
| If new crown needed | Today: temporary crown placed (looks decent, may be slightly loose) |
| If decay found | Today: decay removed, restoration placed; crown scheduled for later |
| 1-2 weeks later | New permanent crown fabricated and placed |
Key Takeaways
A crown falling off isn't an emergency unless the tooth underneath is damaged or infected. Many people can safely use temporary cement and see their dentist the next day.
The exposed tooth is uncomfortable but not in immediate danger (unless it's already infected or broken). Your priority is protecting it from food and keeping it clean.
Drugstore temporary cement works surprisingly well for 24-48 hours, giving you time to reach your dentist without panicking.
If you see decay, pain, or pus underneath the crown, that's when it becomes an emergency. The tooth itself needs treatment, not just the crown.
Crowns fall off—it's normal, it's fixable, and it doesn't mean your tooth is lost. You can get through this. The key is knowing whether you're in crisis mode or inconvenience mode, and now you do. Call your dentist, assess what you've got, and take the next step from there.