A lost crown or filling is a common dental problem, and in most cases it is a fixable one that does not require an emergency room. What matters is what you do in the first hour, whether you save the crown or filling, and how quickly you get in. This guide walks through it.
Dr. Zack Finnegan, DMD at Magnolia Smiles in Woodstock, GA sees this often, and the fix is usually shorter than patients expect.
First hour: what to do
- Do not swallow it. If you feel it come loose while eating, spit it out and check.
- Find it and save it. A crown that came off can usually be re-cemented. A filling almost never gets reused, but keeping it helps the dentist confirm what was lost.
- Rinse the crown gently with warm water. Do not scrub the inside.
- Rinse your mouth with warm salt water.
- Look at the tooth. If it has a sharp edge, cover it with a small piece of sugar-free gum or dental wax so it does not cut your tongue or cheek.
- Do not use household glue. Super glue and similar products are not safe for internal use and often ruin the crown so it cannot be re-cemented.
- If it is a crown and it fits back on cleanly, you can seat it gently, but do not force it. Some pharmacies sell temporary dental cement for short-term hold, safe to use as a bridge to your appointment.
- Chew on the other side until you are seen.
- Call the office. Same day if possible, next business day if you have no pain.
What is normal vs. urgent
Usually not urgent (call for the next appointment)
- The tooth is not painful.
- No swelling.
- No bleeding.
- The edge is smooth or you have covered it.
Urgent (call same day)
- Pain that is more than mild sensitivity.
- Swelling in the face or gum.
- Bleeding from the tooth.
- Fever.
- The tooth is sharp and cutting your tongue or cheek.
- The tooth was on a front tooth and you have a work or social event.
Any of these calls for emergency dentistry sooner.
Why crowns come off
- Cement wore out over 10 to 20 years.
- Decay under the crown undermined the seal.
- The tooth underneath cracked.
- Trauma (a hit to the mouth or biting hard on something).
- A poorly seated crown that never fully settled.
Why fillings fall out
- Decay under the filling weakened the bond.
- The filling was very large and finally fractured.
- Grinding or clenching cracked the filling.
- A crack in the underlying tooth spread.
- The bond aged out (uncommon under normal wear).
What the visit typically looks like
For a lost crown
- Exam and X-ray.
- If the tooth is intact and the crown is intact: clean, re-cement, done. 30 to 45 minutes.
- If there is decay under the crown: clean it out and re-cement, or if the tooth cannot support the crown, discuss a new crown or, in rare cases, extraction.
- Learn more in the detailed loose crown guide.
For a lost filling
- Exam and X-ray.
- Clean out any decay.
- If the tooth is still restorable with a filling: place a new one. 30 to 60 minutes.
- If the tooth is too damaged for a filling: crown or root canal plus crown may be needed.
Most lost fillings and crowns are one-visit fixes.
What to eat until you are seen
- Soft food only.
- Chew on the other side.
- Avoid sticky foods (taffy, caramel, gum).
- Avoid very hot or very cold if the tooth is sensitive.
- Drink water rather than sugary drinks (any exposed dentin is at higher decay risk).
How to prevent it from happening again
- Cleanings and exams every 6 months so aging restorations are caught before they fail.
- Do not chew ice, pens, nails, or popcorn kernels.
- Wear a night guard if you grind.
- Do not use your teeth as tools.
- Tell your dentist promptly if a filling or crown feels different.
What Magnolia Smiles does
- Same-day or next-day appointments for lost crowns and fillings.
- Honest evaluation of whether the same crown can be re-cemented or needs to be remade.
- Written cost estimate for anything beyond re-cementation.
- Follow-up bite check to make sure it does not happen again.
Learn more about restorative dentistry at Magnolia Smiles or dental crowns in Woodstock, GA.
Frequently asked questions
Can I glue the crown back on with super glue?
No. Not safe for internal use and often ruins the crown.
How long can I go before seeing the dentist?
A day or two is usually fine. A week or more risks the teeth shifting so the crown no longer fits.
Will insurance cover re-cementation?
Yes, most plans cover it, sometimes with a small copay. New crowns are covered separately.
What if the tooth broke when the crown came off?
Bring the crown and any tooth pieces in. Options are discussed based on what remains. Usually a new crown or, if the tooth cannot be saved, an extraction and replacement.
Is a lost filling an emergency?
Usually not, unless there is pain, swelling, or a very sharp edge cutting your mouth.
Can I keep chewing on that side?
No. Chewing on the exposed tooth risks fracturing more structure.
Ready to have it fixed?
If your crown or filling just came off, contact Magnolia Smiles to book. Most cases are quick.
Reviewed by Dr. Zack Finnegan, DMD. Magnolia Smiles, Woodstock, GA. This article is for general education and does not replace an in-person exam.