If your dental crown just broke or fell off, retrieve it immediately and keep it safe. In many cases, your dentist can reattach or repair the original crown, saving you the cost and time of a full replacement. What you do in the first few hours matters: the right temporary fix protects your tooth, while the wrong one (like superglue) can cause real damage.
What to Do Right Away
Find the crown. If it popped out whole, gently clean the inside with toothpaste and rinse it. Store it in a small container or plastic bag so you can bring it to your dentist. If it broke into pieces, save every fragment you can.
Your exposed tooth will likely feel sensitive to temperature, pressure, or even air. Rinse your mouth with warm salt water (1 teaspoon of salt in 1 cup of warm water) to keep the area clean. You can take ibuprofen or acetaminophen for pain. If the inner nerve tissue is exposed, a pink or red spot at the center of the tooth, avoid anything very hot or cold until you’re seen by a dentist. Put ice against the outside of your cheek, not directly on the tooth.
You can buy temporary dental cement at most pharmacies and grocery stores. Clean the inside of the crown, apply a thin layer of the cement, and gently press the crown back into place. This protects the tooth from bacteria and sensitivity until your appointment. Temporary filling material also works if the crown is too broken to reattach. Follow the directions on the package and treat it as a short-term fix, not a permanent solution.
In a pinch, even sugar-free gum or a dab of toothpaste can hold a loose crown in place for a few hours. The goal is simply to keep the tooth covered and avoid swallowing the crown.
Why You Should Never Use Superglue
Household superglue contains industrial-grade chemicals designed for plastic, metal, and wood. Inside your mouth, these compounds can irritate or burn your gums, tongue, and cheeks. Superglue also generates heat as it hardens, which can damage the nerve and blood supply inside your tooth.
The bigger problem is what happens next. Even a fraction of a millimeter of misalignment changes your bite, puts uneven pressure on surrounding teeth, and leaves tiny gaps where bacteria collect. Superglue seals those bacteria against your tooth in a closed environment where decay develops invisibly. And because superglue bonds so aggressively, your dentist may need to drill through it or sacrifice the crown entirely to access the tooth underneath. Dental cements are specifically designed for controlled removal. Superglue is not.
Protecting Your Tooth Before the Appointment
Until you see your dentist, stick to soft foods and liquids. Avoid anything sticky, crunchy, or chewy, and try to eat on the opposite side of your mouth. Brush gently around the exposed tooth. Warm salt water rinses after meals help prevent infection.
Call your dentist as soon as possible. A crown that fell off cleanly is a straightforward fix if handled within a few days. A crown that broke because of decay underneath is more urgent, since the exposed tooth is vulnerable to further damage and infection.
When a Crown Can Be Recemented
If the crown came off in one piece and the underlying tooth is healthy, your dentist can often reattach it in a single short visit. They’ll check that the crown is still intact, that its edges seal properly against the tooth, that it contacts the neighboring teeth correctly, and that your bite feels right. If everything checks out, they clean the tooth, apply fresh dental cement, and seat the crown. The whole process typically takes under an hour.
Crowns that fall off repeatedly suggest a deeper issue: the tooth underneath may have changed shape from decay, the original fit may have been poor, or the cement bond may not hold due to contamination from saliva or bacteria.
When You Need a Replacement
A crown needs full replacement when it’s cracked, when the underlying tooth has significant decay, or when the fit is no longer accurate. Several warning signs suggest the problem goes beyond a loose crown:
- Sensitivity to temperature or biting pressure that wasn’t there before
- A dark line near the crown’s edge, which often signals decay underneath
- Persistent bad breath or a bad taste around the crown
- Gum irritation or swelling near the affected tooth
- Food trapping or difficulty flossing around the crown
Your dentist will use X-rays to check for cavities beneath the crown. Metal crowns can block the view on standard X-rays, so advanced imaging is sometimes needed to get a clear picture. If decay is present, the dentist will remove the old crown, treat the tooth, and fabricate a new one.
Repairing a Chipped Crown
If your crown is still attached but has a chip or small fracture, it doesn’t always need replacement. Dentists can repair minor porcelain chips using composite resin, a tooth-colored filling material bonded directly to the damaged surface. The repair involves roughening the chipped area, applying a bonding agent, and building up the missing porcelain with layers of resin that are hardened with a curing light.
The strength of the repair depends heavily on how the porcelain surface is prepared. Research in the Journal of Conservative Dentistry found that acid-etching the porcelain before bonding produced fracture resistance nearly equal to intact porcelain, while sandblasting alone produced a much weaker bond. A well-done composite repair can last years, but it generally won’t be as durable as the original crown. Larger fractures, cracks that extend below the gum line, or damage on a chewing surface that takes heavy force typically call for a new crown.
How Long a New Crown Takes
If you do need a replacement, the timeline depends on the technology your dentist uses. Traditional crowns require two to three visits spread over two to six weeks. At the first appointment (90 to 120 minutes), your dentist prepares the tooth, takes impressions, and fits a temporary crown. The impressions go to a lab, and you wear the temporary for two to four weeks. At the second visit (45 to 60 minutes), the permanent crown is fitted. Sometimes a third visit is needed for adjustments.
Same-day crowns use digital scanning and in-office milling to complete everything in a single appointment of two to three hours. There’s no temporary crown period and no second visit. You walk out with a permanent restoration that afternoon. Not every dental office has this technology, and not every situation is a good fit for same-day fabrication, but it’s worth asking about if you want to minimize time in the chair.