What This Guide Covers
This guide explains how to handle a crown that has fallen off, including safe temporary fixes you can do at home and clear guidance on when to call your dentist.
A dental crown is a cap shaped like a tooth. It fits over a damaged or weakened natural tooth to restore its shape, strength, and appearance. Crowns are cemented in place and are meant to last many years. Sometimes, though, the cement weakens or other problems develop, and the crown comes loose or falls off entirely. [2]
This situation is common and usually not a medical emergency. Most people can manage the exposed tooth safely at home for a short time. The key is knowing which steps are safe and which materials to avoid. Whether your crown popped off while eating, during sleep, or while flossing, the advice here applies.
This guide is for anyone with a temporary or permanent crown that has come loose. It is also useful for caregivers helping a child or older adult who has lost a crown.
Why Crowns Come Loose and What Happens to the Tooth Underneath
Crowns fall off because the bond between the crown and the tooth weakens over time, or because the tooth structure underneath has changed.
Common Reasons a Crown Falls Off
Several factors can cause a crown to detach. Understanding the cause helps your dentist decide whether the same crown can go back on or whether you need a new one.
Cement breakdown is one of the most frequent causes. Dental cement gradually dissolves over years of exposure to saliva, chewing forces, and temperature changes. Once enough cement washes away, the crown loosens and eventually slides off. [2]
Tooth decay (cavities) can develop at the margin where the crown meets the natural tooth. This decay changes the shape of the tooth underneath, and the crown no longer fits snugly. A crown may also come off if the original preparation was too short or too tapered, giving the cement less surface area to grip. Biting into hard or sticky foods, grinding your teeth at night (bruxism), or trauma to the face can also dislodge a crown.
- Cement breakdown: Gradual dissolving of the bonding material over months or years.
- Decay under the crown: Cavities at the crown margin change the tooth shape and weaken the seal.
- Poor original fit: A crown that was slightly loose from the start is more likely to come off.
- Bruxism: Chronic teeth grinding places repeated lateral forces on the crown.
- Sticky or hard foods: Caramel, taffy, hard candy, and ice can pull or crack a crown.
- Trauma: A blow to the mouth during sports or a fall.
What Happens to the Exposed Tooth
Once the crown is off, the prepared tooth underneath is exposed. This tooth has been reshaped by a dentist. It is smaller than a normal tooth and may have sharp edges. The exposed dentin layer (the softer tissue beneath enamel) is more sensitive to hot, cold, and sweet foods. [2]
Without its protective cap, the tooth is also more vulnerable to new decay and fracture. That is why it is important to see a dentist within a few days, even if you feel no pain. The longer the tooth stays uncovered, the greater the risk that bacteria will reach the inner tooth structure.
Temporary Fix Steps You Can Do at Home
You can protect the exposed tooth and temporarily reattach the crown using products found at most pharmacies.
Step-by-Step: Reattaching a Crown Temporarily
Follow these steps as soon as the crown comes off. Work over a towel or bowl so you do not drop the crown down a drain.
First, retrieve the crown and rinse it gently under lukewarm water. Do not scrub the inside. Look at the crown to check for cracks or missing pieces. If the crown is intact, you can try to place it back on the tooth. If it is broken, skip ahead to the section on protecting the tooth without the crown.
Next, gently clean the exposed tooth with a soft toothbrush and lukewarm water. Do not use a toothpick or sharp instrument inside the tooth. Dry the tooth and the inside of the crown with a clean tissue.
- Step 1: Rinse the crown gently under lukewarm water.
- Step 2: Inspect the crown for cracks, chips, or missing fragments.
- Step 3: Clean the exposed tooth gently with a soft toothbrush.
- Step 4: Dry both the crown and the tooth with a clean tissue.
- Step 5: Apply a thin layer of over-the-counter dental cement or denture adhesive paste inside the crown.
- Step 6: Press the crown back onto the tooth. Bite down gently on a cotton roll or folded gauze for one to two minutes to seat it.
- Step 7: Wipe away any excess cement that squeezes out around the edges.
Which Temporary Products to Use
Over-the-counter dental cement kits are sold at most pharmacies under names like Dentemp and Recapit. These products are designed for short-term crown reattachment and are considered safe for home use. [2] Denture adhesive paste (such as Fixodent or Poligrip) is another option. It will not hold as firmly as dental cement, but it can keep the crown in place for a day or two while you arrange a dental visit.
Apply only a thin layer of product inside the crown. Too much cement can prevent the crown from seating fully, which throws off your bite. If the crown feels high when you close your teeth together, remove it, clean out the excess material, and try again with a thinner layer.
Products You Should Never Use
Super glue, nail glue, and household adhesives are not safe for use in the mouth. These products contain cyanoacrylate compounds that are not approved for oral tissue contact. They can irritate gums, bond to soft tissue, and make it much harder for your dentist to remove the crown later when proper recementation is needed. [2]
Chewing gum (sugar-containing) should also be avoided as a temporary fix because the sugar sits directly against the exposed tooth and feeds bacteria. If you do not have dental cement or denture adhesive on hand, a small piece of sugar-free gum or orthodontic wax pressed over the exposed tooth can serve as a short-term barrier.
If the Crown Is Lost or Broken
Sometimes the crown cracks, or you cannot find it. In that case, focus on protecting the exposed tooth. Place a small piece of sugar-free gum or dental wax over the prepared tooth to shield it from temperature and contact. You can also apply a thin coat of over-the-counter desensitizing toothpaste (containing potassium nitrate) directly to the tooth to reduce sensitivity.
Avoid chewing on that side of your mouth. Stick to soft foods and lukewarm beverages. Do not skip brushing the area, but be gentle. These measures can keep you comfortable until your dental appointment.
What to Expect at the Dental Visit
Your dentist will examine the tooth and the crown to determine whether the original crown can be recemented or a new one is needed.
Examination and X-Rays
The dentist will first remove any temporary cement you applied at home. They will examine the prepared tooth for decay, cracks, or fractures. In many cases, an X-ray (radiograph) is taken to check the root and surrounding bone. If the tooth has decay at the margin, the dentist will need to remove it before anything goes back on. [2]
The inside of the crown is also inspected. If the crown is intact and the tooth has not changed shape, recementation is typically straightforward. The dentist cleans both surfaces, applies professional-grade dental cement, and seats the crown. The entire process often takes less than 30 minutes.
Recementation vs. a New Crown
Recementation is possible when the crown fits well and the underlying tooth is healthy. The dentist uses a stronger cement than what is available over the counter. The crown is pressed into place and checked with bite paper to make sure your bite alignment is correct.
A new crown is needed if the original is cracked, if significant decay has changed the tooth shape, or if the tooth has fractured. In these situations, the dentist will reshape the tooth, take a new impression or digital scan, and place a temporary crown while the permanent one is fabricated. A prosthodontist (a specialist in tooth restoration and replacement) may be recommended for complex cases, such as teeth with very little remaining structure. [1]
When a Root Canal May Be Needed
If the tooth underneath the crown is severely decayed or if the nerve inside the tooth has been damaged, a root canal may be necessary before a new crown can be placed. Signs that the nerve may be involved include constant throbbing pain, swelling around the gum line, or a bad taste coming from the tooth. Your dentist will check the nerve health during the examination and refer you to an endodontist (root canal specialist) if needed.
Cost of Crown Recementation and Replacement
Recementation of an existing crown is typically one of the least expensive dental procedures, while a full replacement crown costs significantly more.
Recementation fees generally range from $50 to $350. This covers cleaning the tooth, removing old cement, and bonding the crown back in place. A brand-new crown, including tooth preparation, impressions, and the laboratory fabrication fee, typically ranges from $800 to $3,000 or more per tooth. Costs vary by location, provider, and case complexity.
Many dental insurance plans cover recementation under basic restorative benefits. Crown replacement is also commonly covered, though plans often have waiting periods or annual maximums that affect out-of-pocket cost. Check with your insurance provider before your appointment to understand your coverage. If you do not have insurance, ask the dental office about payment plans or membership discount programs.
A prosthodontist's fees may differ from those of a general dentist, particularly for complex restorations. The added training a prosthodontist brings can be valuable when the tooth requires significant rebuilding before a new crown is placed. [1]
When to See a Prosthodontist Instead of a General Dentist
A general dentist can handle most simple recementations. A prosthodontist should be considered when the case is more complex.
A prosthodontist completes two to three years of advanced training beyond dental school, focused on restoring and replacing teeth. [1] According to the American College of Prosthodontists, patients benefit most from specialist care when multiple crowns are involved, when the tooth structure is severely compromised, or when the bite needs significant adjustment. [1]
You should also consider seeing a prosthodontist if your crown has come off more than once on the same tooth. Repeated failures suggest an underlying fit or design problem that requires specialist-level evaluation. Other reasons to seek specialist care include crowns on dental implants (rather than natural teeth), crowns that are part of a bridge, and cases where cosmetic appearance in the front of the mouth is a priority.
Visit the prosthodontics page to learn more about what these specialists do and how their training differs from that of a general dentist.
- Crown has come off more than once: Repeated failure often signals a fit or design issue.
- Very little tooth structure remains: The tooth may need a post-and-core buildup before a new crown.
- Implant-supported crown: Implant components require specialized handling.
- Crown is part of a bridge: Multi-unit restorations are more complex to recement or replace.
- Front teeth with high cosmetic demands: Shade matching and contour design benefit from specialist expertise.
- Significant bite problems: Uneven bite alignment after recementation may need occlusal (bite) analysis.
Find a Prosthodontist Near You
If your crown has fallen off and you need specialist care, a prosthodontist can evaluate the tooth and recommend the best path forward. Use the directory on the prosthodontics page to search for a qualified prosthodontist in your area. You can filter by location, read about each provider's background, and book an appointment directly.
Search Prosthodontists in Your Area