What to Do If Your Dental Crown Falls Out: A Step-by-Step Guide

Medically reviewed by Dr. Eugene Bernstein, DDS, Practice Leader, General & Cosmetic Dentistry | 25+ Years Experience | Last Updated: May 2026

Direct answer: If your dental crown just fell out, retrieve it, rinse it gently with warm water, and call your dentist. Do not use super glue, household adhesives, or hot glue. If the crown is intact and you cannot reach the dentist today, a temporary dental cement from the pharmacy (Dentemp or Refilit) holds the crown back in place for two to seven days. If you have throbbing pain, swelling, or there is no tooth left under the crown, that is a same-day emergency, call us at (973) 817-8888.

No pain, crown intact: book within 24 to 72 hours, use temporary cement to hold the crown.
Mild ache, sensitive tooth: book within 24 hours, soft food on the other side, OTC pain relief.
Throbbing, swelling, fever, or no tooth left: same-day emergency call.
Never use: super glue, Krazy Glue, hot glue, denture adhesive, or sugar-based gum to reattach a crown.

What to Do Right Now if Your Crown Just Fell Out

Stay calm and find the crown. A loose dental crown is one of the most common dental issues we handle, and it can almost always be fixed. If the crown came out while you were eating, check what is in your mouth carefully so you do not swallow it.
Rinse the crown. Hold it under warm running water for a few seconds to remove food debris and saliva. Do not scrub it with a toothbrush, which can scratch the inner cement surface.
Examine the crown. Look at the inside (the side that was on the tooth). If you see old cement still attached, the cement bond failed and the crown is likely re-usable. If you see tooth structure stuck inside the crown, the underlying tooth fractured, which is a same-day emergency.
Examine the exposed tooth. The tooth underneath is now vulnerable. Note whether you can see a small post sticking up, whether the tooth is sharp or jagged, whether the tooth is dark, and whether you have any pain. All four of these change the urgency.
Rinse your mouth with warm salt water. One teaspoon of salt in a cup of warm water, swished gently for 30 seconds, calms the gum and removes debris from around the exposed tooth.
Call the dentist. Most practices keep same-day or next-day slots open for lost crowns. Tell them how long ago it fell out, whether you have pain, and whether the crown is intact. They will tell you how soon to come in.
Store the crown safely. A small zip-top bag or empty pill bottle works. Bring it to the appointment, the dentist needs to see it.
Eat soft foods on the other side until the visit. Avoid hard, sticky, very hot, or very cold foods. Brush gently around the exposed tooth and skip flossing in that gap.

Is It an Emergency? When to Call the Dentist Today vs Tomorrow

Not every lost crown is a same-day emergency. The pain pattern and what is left under the crown determine the urgency.

What you have	Urgency	What to do
Crown intact, no pain, tooth looks fine	Within 72 hours	Temporary cement at home, book the next available appointment
Crown intact, mild ache, cold sensitivity	Within 24 to 48 hours	Temporary cement, OTC pain relief, soft food
Crown intact, sharp pain on biting or pressure	Within 24 hours	Same-day call, do not eat on that side
Throbbing pain that wakes you at night	Same-day emergency	Call the office right away, this can mean pulpitis or infection
Swelling, fever, or bad taste	Same-day emergency	Call the office right away, possible abscess
No tooth left underneath, or only a tiny stub	Same-day emergency	Same-day visit, the underlying tooth or post likely fractured
Tooth structure stuck inside the crown	Same-day emergency	Same-day visit, fracture under the crown is the most likely cause
Crown is broken or cracked	Within 48 hours	The crown will need to be remade, no temporary cement

The general rule: if you can chew softly on the other side without sharp pain, you can wait 24 to 72 hours. If chewing or talking triggers sharp pain, call the same day.

How to Temporarily Reattach a Crown at Home

If the crown is intact and you cannot get to the dentist in the next 24 hours, a temporary dental cement from the pharmacy holds the crown in place for a few days while you wait. This buys time, it does not fix the problem.

Buy temporary dental cement, available at most pharmacies and large grocery stores. Trusted product names: Dentemp Maximum Strength, Refilit Filling Material, ZOM Temp Tooth, or Recapit. Cost is typically $7 to $15.
Clean the crown by rinsing the inside with warm water and gently drying it with a clean tissue. Do not use mouthwash or alcohol on the inside surface, both interfere with the cement.
Clean the exposed tooth with a soft toothbrush and warm water, then dry it with a clean tissue. The drier the tooth, the better the cement holds.
Apply a small amount of cement to the inside of the crown, about a pea-sized dab. Do not overfill, or excess cement will squeeze out into your gum.
Seat the crown by lining it up over the tooth in the same orientation it sat before, then biting down gently to seat it fully. Hold pressure for 30 to 60 seconds.
Wipe away excess cement from the gum line with a clean cotton swab or your finger before it sets. Most temporary cements set in 5 to 10 minutes.
Wait at least 30 minutes before eating. Eat soft food only on the other side until your dentist visit.

When patients call us with a crown that just fell out, the first question we ask is whether they are in pain. If yes, that is a same-day visit. If no and the crown is intact, a Dentemp temporary cement from the pharmacy holds the crown for two to seven days while we get them on the schedule. The mistakes we see most often are super glue, hot glue, or denture adhesive, all of which damage the tooth or the crown and make the eventual fix harder.
Dr. Eugene Bernstein, DDS, Practice Leader, Gentle Dental of NJ (NYU College of Dentistry, 25+ years)

Temporary cement holds reliably for 2 to 7 days. If it loosens, you can re-cement once. If it loosens twice, the crown does not fit cleanly anymore and needs the dentist’s hand.

What NOT to Use to Reattach a Crown

Some online “DIY hacks” for reattaching crowns will damage your tooth, your crown, or both. The dentist’s eventual job becomes harder, and the bill becomes higher. Avoid all of the following.

Super glue (cyanoacrylate), Krazy Glue, Gorilla Glue. Not safe for the mouth, releases irritants, sets too rigidly, can bond the crown permanently in the wrong position. The dentist may have to drill the crown off, destroying it.
Hot glue. Cools too quickly, will not seat the crown evenly, and the residue is hard to remove from the inside of the crown.
Denture adhesive. Designed for soft tissue, not enamel. Does not hold a crown reliably and is messy at the gum line.
Toothpaste alone. Sometimes recommended online as a “temporary fix.” It will not hold the crown for more than a few hours and the abrasive ingredients can scratch the crown’s inner surface.
Sugar-based gum. Sugar feeds bacteria that have access to the now-exposed tooth. Skip it entirely.
Nail polish, putty, candle wax, or other household sealants. All damage the crown surface and can leak chemicals into the exposed tooth.

If the crown will not stay in with proper temporary cement, leave it out. Store it safely. Schedule the dentist visit. A crown that has been improperly glued in place is a much harder fix than one that comes in with the patient in a baggie.

My Crown Fell Out and There’s No Tooth Left Underneath

This is one of the most stressful versions of a lost crown, and the shape of the answer depends on what you actually see when you look in the mirror.

You see a thin metal post sticking up. The original tooth had so little structure left that the dentist placed a post into the root and built a buildup before the crown. The post is usually still anchored. The dentist re-cements the crown over the post, possibly after rebuilding the buildup. This is common and usually fixable in one visit.
You see only a tiny stub of tooth at gum level. The tooth fractured at or below the gum line. The crown likely came out with the broken piece still inside. This is a same-day emergency. Treatment options include crown lengthening (gum surgery to expose more tooth), a new post and core build-up, or, if the fracture extends below the bone, extraction and replacement with an implant or bridge.
You see only the gum, no tooth and no post visible. The crown likely came out with the entire post and any remaining tooth structure inside it. This is also a same-day emergency. Look at the inside of the crown, you will probably see the post and tooth fragment cemented inside it. Treatment is almost always extraction plus implant, bridge, or partial denture planning.
You see the gum and a dark area where the tooth used to be. If the tooth had a root canal previously and the root has now fractured, this presentation is common. Same-day emergency. Treatment depends on whether any root structure can be saved.

In every “no tooth left” scenario, do not try to seat anything in the empty space. Rinse with warm salt water, take OTC pain relief if needed, and call us. Dr. Mariya Rozenblum, our endodontist, evaluates root fractures and salvageable cases the same day when possible.

Why Do Dental Crowns Fall Out?

Most lost crowns trace back to one of six causes. Knowing which one applies often shapes the fix.

Cement bond fatigue. The most common reason a crown that has been comfortable for years suddenly comes off. Cement breaks down over a 10 to 15-year window, especially if exposed to acidic foods, sugar, and hot or cold extremes. The crown is usually re-cementable.
Recurrent decay at the crown margin. A new cavity at the edge of the crown weakens the seal. The crown loses adhesion gradually, then comes off. Treatment usually involves removing decay, rebuilding the margin, and either re-cementing or replacing the crown. A crown that has started to hurt often signals decay before the crown actually falls.
Sticky food pulled the crown. Caramel, taffy, gum, and sticky candy can yank a crown that has been quietly losing its cement seal. The crown itself is often fine, just dislodged.
Bruxism (grinding or clenching). Years of nighttime grinding stress the crown’s bond. A nightguard usually solves the recurrence after re-cementing or replacing.
Improper original fit. A crown that did not seat fully at original placement carries a thicker cement gap and tends to come loose earlier. The fix is usually a new crown.
Tooth fracture under the crown. The underlying tooth cracked, the crown lifted off as the tooth flexed. This is the worst-case scenario, treatment depends on whether the fractured tooth can be saved or needs extraction.

What the Dentist Will Do at Your Visit

The dentist’s first step is an exam plus an x-ray. From there, the treatment depends on the condition of the crown and the tooth underneath.

Re-cement the existing crown. If the crown and the tooth are both intact, the dentist removes the old cement, cleans both surfaces, and re-cements with permanent dental cement. This is the simplest and least expensive outcome. Industry-standard cost runs $0 to $200 (some practices charge no fee for re-cement within a few years of original placement).
New crown. If the crown is cracked, worn, or no longer fits cleanly, a new crown is made. This involves an impression, a temporary crown, and a return visit for the permanent. Industry-standard cost runs $1,000 to $3,000 per crown depending on material.
Root canal first, then new crown. If the underlying tooth has decay reaching the nerve or shows pulpitis, a root canal is needed before any new crown is placed. Industry-standard cost runs $700 to $1,500 for the root canal plus $1,000 to $3,000 for the new crown.
Crown lengthening + new crown. If the tooth fractured at or near the gum line, gum surgery exposes more tooth, then a new crown is built. Total cost runs $2,000 to $5,000 across multiple visits.
Extraction plus implant or bridge. If the tooth or root cannot be saved, the tooth is extracted and replaced with an implant ($3,000 to $5,000) or a bridge ($2,500 to $4,500 depending on units).

At Gentle Dental of NJ we discuss exact fees, insurance coverage, and financing at the consultation. When crowns need to be replaced covers the full decision framework. The American Dental Association’s crown overview covers materials and care standards.

How to Prevent Your Crown from Falling Out Again

Avoid sticky candy, taffy, and gum on the crowned side, especially in the first six months after placement.
Skip ice, hard nuts, and popcorn kernels. These crack both crowns and the teeth they sit on.
Wear a nightguard if you grind your teeth. Custom nightguards run $300 to $700 and protect crowns, natural teeth, and the jaw joint.
Keep up with cleanings every six months. The hygienist catches decay at crown margins early, before it compromises the seal.
Brush twice a day and floss daily, with extra attention at the crown margin where biofilm collects.
Address pain promptly. Crown discomfort that ignores polite waiting often means the seal is starting to fail. Call the office.
Replace crowns at end-of-life. Most porcelain and PFM crowns last 10 to 15 years; zirconia often longer. Crown lifespan by material covers what to expect.

Frequently Asked Questions

What should you do if your dental crown falls out?

Retrieve the crown, rinse it with warm water, and call the dentist. If the crown is intact and you have no pain, use a temporary dental cement (Dentemp or Refilit) from the pharmacy to hold it for 2 to 7 days. If you have throbbing pain, swelling, or no tooth left underneath, that is a same-day emergency.

Is a crown falling out a dental emergency?

Not always. If the crown is intact, the tooth underneath is fine, and you have no pain, you can wait 24 to 72 hours for an appointment. It becomes a same-day emergency when there is throbbing pain, swelling, fever, no tooth left underneath, or tooth structure stuck inside the crown.

How can I temporarily put my crown back on?

Buy a temporary dental cement (Dentemp Maximum Strength, Refilit, or ZOM Temp Tooth) at the pharmacy. Clean both the crown and the exposed tooth, dry them, place a pea-sized dab of cement inside the crown, seat it, hold for 30 to 60 seconds, wipe excess from the gum line, and wait 30 minutes before eating soft food. This holds for 2 to 7 days while you get to the dentist.

Can I use super glue to reattach a dental crown?

No. Super glue (cyanoacrylate), Krazy Glue, and household adhesives are not safe for the mouth, release irritants, and can bond the crown in the wrong position permanently. The dentist may have to drill the crown off, destroying it. Use temporary dental cement designed for the mouth instead.

What if my crown fell out and there is no tooth left underneath?

This is a same-day emergency. The most likely cause is a fractured tooth or post that broke off at or below the gum line. Look at the inside of the crown, you may see tooth structure or a metal post stuck inside. Do not try to seat anything in the empty space. Rinse with warm salt water, take OTC pain relief if needed, and call the office for a same-day visit. Treatment options range from crown lengthening surgery and a new build-up to extraction and replacement with an implant or bridge.

How much does it cost to re-cement or replace a crown?

Industry-standard ranges: re-cement an existing intact crown $0 to $200, new crown $1,000 to $3,000 depending on material, root canal plus new crown $1,700 to $4,500, crown lengthening plus new crown $2,000 to $5,000. Final fees depend on the underlying tooth condition and your insurance coverage.

Why did my dental crown fall out?

The six common causes are cement bond fatigue (most common after 10+ years), recurrent decay at the crown margin, sticky foods pulling a quietly loose crown, bruxism (grinding) stressing the bond, improper original fit, and tooth fracture under the crown.

How soon do I need to see the dentist after a crown falls out?

Within 24 to 72 hours if you have no pain and the crown is intact, within 24 hours if you have mild discomfort, and the same day if you have throbbing pain, swelling, fever, or no tooth left underneath. Sooner is always better because the exposed tooth is vulnerable to fracture, decay, and shifting of neighboring teeth.

If the crown was already painful before it fell out, see why does my crown hurt for the eight common pain causes. If your crown is dull or discolored rather than loose, see how to whiten or polish a discolored crown.

Visit Gentle Dental of NJ in Newark, NJ

290 Ferry St B2, Newark, NJ 07105 (Ironbound)
(973) 817-8888 | Schedule a Same-Day Visit
Serving Newark, Ironbound, East Ferry, Belleville, Kearny, Harrison, North Ironbound, and Downtown Newark. Same-day re-cement, emergency root canal evaluations with Dr. Rozenblum, and crown replacements available.

Disclaimer

This information is provided for educational purposes and is not a substitute for professional dental advice, diagnosis, or treatment. Please schedule a consultation with our team to discuss your individual needs.