If your dental crown popped off, you can temporarily reattach it at home using over-the-counter dental cement, which costs a few dollars at most pharmacies. This is a short-term fix to protect the exposed tooth until you can get to a dentist, typically within a few days. A professional recementation runs $100 to $500 depending on the condition of the crown and whether any additional work is needed.
The most important thing right now: find the crown and don’t throw it away. Your dentist may be able to clean it and cement it back permanently, saving you the cost of a brand-new one.
What to Do Right Away
Pick up the crown and rinse it gently under warm water. Look inside it for any debris or old cement, and carefully clean the interior with a toothbrush and toothpaste. Don’t scrub aggressively or use anything abrasive. Set it somewhere safe.
Next, look at the exposed tooth in a mirror. If it’s a small, rounded stub with no visible dark spots or sharp broken edges, that’s a good sign. It means the crown likely came off because the cement failed, not because the tooth underneath broke. If you see dark discoloration, a cracked or fractured tooth, or the stub looks significantly shorter than you’d expect, skip the home reglue and call your dentist right away. Decay or structural damage underneath means the crown won’t stay put no matter what you do.
While the crown is off, stick to soft foods, avoid chewing on that side, and brush the exposed tooth very gently. The tooth underneath a crown is shaved down and often sensitive, so hot and cold foods may be uncomfortable.
Choosing the Right Temporary Cement
Look for temporary dental cement at any pharmacy or grocery store. Products like Dentemp and Recapit are widely available and designed specifically for this. They’re usually zinc oxide-based, which is the same general category dentists use for temporary restorations. These cements are intentionally weak, making them easy for your dentist to remove later.
Do not use super glue, Gorilla Glue, or any household adhesive. Research on cyanoacrylate adhesives (the active ingredient in super glue) shows they release toxic substances that kill oral tissue cells, and this toxic release continues for at least two weeks after application. Beyond the toxicity, super glue creates a rigid, permanent bond that can make it impossible for your dentist to remove the crown cleanly. You could end up needing a completely new crown, or worse, damaging the tooth underneath.
If you can’t get to a store right away, a small dab of toothpaste or a piece of sugar-free gum pressed inside the crown can hold it loosely in place for a few hours. Neither is a real adhesive, but they can keep the crown from falling out while you eat or sleep.
How to Reattach the Crown Step by Step
Before you apply any cement, do a dry run. Place the crown back on the tooth stub without cement and gently bite down. You’re checking two things: that the crown sits flush against the gum line without rocking, and that your bite feels normal when your teeth come together. If the crown wobbles, sits too high, or won’t slide all the way down, don’t force it. Something has changed with the fit, and cement won’t fix that.
Once you’ve confirmed the fit:
- Dry the tooth. Use a tissue or gauze to gently pat the tooth stub dry. Cement bonds better to a dry surface.
- Apply a thin layer of cement. Follow the product instructions, but generally you’ll spread a small amount evenly inside the crown. Less is more. Excess cement squeezing out the sides can irritate your gums.
- Seat the crown. Press it onto the tooth, making sure it’s oriented the same way it was before. The front and back of the crown are shaped differently, so take a moment to line it up correctly.
- Bite down gently. Hold steady biting pressure for two to three minutes to let the cement begin setting. Don’t grind or shift your jaw.
- Clean up excess. Wipe away any cement that squeezes out around the edges using a damp cotton swab or your finger.
Avoid chewing on that side for about 24 hours to give the cement time to fully harden. After that, you can eat on it cautiously, but treat it as fragile. Avoid sticky candy, hard nuts, ice, and chewy foods like caramel or taffy until your dentist has permanently recemented the crown.
Why the Crown Came Off
Understanding why it fell off helps you know what to expect at the dentist. The most common reason is simply cement failure. Dental cement degrades over time, especially if the crown is older than 10 or 15 years. Everyday chewing, temperature changes from hot and cold food, and normal wear gradually break down the bond. In these cases, your dentist can often clean the crown and recement it in a single short visit.
The more concerning cause is decay underneath the crown. Bacteria can work their way under the edges over years, especially if the crown doesn’t fit perfectly or if plaque builds up along the gum line. As the tooth structure decays, it literally shrinks away from the crown, and the cement has nothing left to grip. If this is what happened, recementation alone won’t work. Your dentist will need to treat the decay first, and depending on how much tooth is left, you may need a new crown or a different restoration entirely.
Crowns can also loosen from habitual teeth grinding, a bite that has shifted over time, or trauma like biting down on something unexpectedly hard. If your crown has fallen off more than once despite professional recementation, that’s a signal something else is going on, whether it’s grinding, ongoing decay, or a crown that no longer fits the tooth properly.
Signs You Need More Than Regluing
A temporary home fix works well when the crown and tooth are both in good shape and the cement simply gave out. But several signs point to a problem that over-the-counter cement can’t solve:
- Visible dark spots on the tooth stub. This likely means decay has developed underneath, and the crown needs to come off for treatment regardless.
- A cracked or chipped crown. Even small cracks compromise the crown’s strength and seal. Your dentist can evaluate whether a repair is possible or a replacement is needed.
- Pain or throbbing in the tooth. Sensitivity to air or temperature is normal with an exposed stub, but a deep ache or throbbing may indicate infection or nerve involvement.
- Swelling, redness, or a bad taste. These suggest bacteria have been active under the crown for a while. A persistent foul taste or odor that doesn’t go away with brushing is a particularly telling sign.
- The crown won’t seat properly. If it rocks, sits higher than before, or won’t go all the way down, the tooth shape has changed, usually from decay or a fracture.
Professional recementation is a quick procedure. Your dentist will clean both the crown and the tooth, check for decay with an exam or X-ray, and bond the crown back with a permanent cement that’s significantly stronger than anything available over the counter. The whole visit typically takes 15 to 30 minutes. If the crown is still in good condition and the tooth is healthy, this is one of the simpler and less expensive dental procedures you can have done.