Crown fell off — what to do right now and whether it can be re-cemented

Key facts

• Keep the crown in a clean container
• Do not use household glue
• Pharmacy temporary cement is a short-term fix only
• Decay or fracture must be ruled out before re-cementing
• Seek urgent care for swelling, fever or severe pain

Immediate steps when a crown comes off

First, check that you have not swallowed or inhaled the crown; if you are coughing persistently or have difficulty breathing, seek urgent medical care. If you have the crown, rinse it gently, dry it and keep it in a small container or sealed bag. Do not try to glue it with household adhesive. Rinse your mouth with warm water and look at the tooth in a mirror: note if part of the tooth has broken off with the crown. Avoid chewing on that side and steer clear of very hot, cold or sweet food if the tooth is sensitive. Then call the clinic to arrange an appointment.

Temporary measures at home

If the exposed tooth is sensitive, a dental temporary cement from a pharmacy can sometimes be used to seat the crown back for a short time, provided it fits easily and fully, you can bite normally and you are not at risk of swallowing it. Never force a crown into place. Alternatively, a small amount of temporary filling material or sugar-free gum can cover a sharp edge. These are stop-gaps lasting days, not weeks. Keep brushing gently around the tooth, because an exposed prepared tooth can decay quickly. Over-the-counter pain relief suitable for you can help until you are seen.

Why crowns come off

A crown may come off because the cement has washed out over time, because decay has developed under the crown and undermined the tooth, because the tooth itself has fractured, or because the original preparation was short or tapered and gave little retention. Sticky foods such as toffee or chewing gum, grinding and biting hard objects can all dislodge a crown. Crowns on implants can loosen when an abutment screw works loose rather than the cement failing. Identifying the cause is important, because simply re-cementing a crown over decay or a crack is likely to fail again and could allow the problem to worsen.

Can the crown be re-cemented?

Often yes, if the crown is intact, still fits accurately and the tooth underneath is healthy. The dentist cleans out the old cement, checks for decay and cracks, takes an X-ray if needed and confirms the fit before re-cementing. If decay is present, it must be removed and the core rebuilt, which usually means a new crown, since the old one will no longer fit. If a significant part of the tooth has broken, a post and core or crown lengthening may be needed. If the root is cracked, extraction and an implant or bridge may be discussed. Implant crowns that loosen are usually re-tightened.

When it is urgent and how to get seen

A lost crown is usually not a medical emergency, but it should be seen within a few days to protect the tooth and stop neighbouring teeth from shifting. Seek prompt care for severe pain, swelling of the gum or face, fever, a sharp broken tooth cutting your tongue, or bleeding that does not stop. A lost front crown can also be restored temporarily for appearance. Manhal Medical Center in Dubai, is open daily, and Dr. Manhal Helfawee and the dental team arrange visits for lost crowns as promptly as the schedule allows. Bring the crown with you to the appointment.

A crown covers and strengthens a damaged tooth; a bridge replaces a missing tooth by anchoring to the teeth on either side. Zirconia and porcelain options combine strength with a natural appearance.

Prepared by the Manhal Medical Center editorial team · Updated: 2026-10-18 · Treating specialist: Dr. Manhal Helfawee

This page is general information and does not replace a consultation. Suitability, risks and results vary between patients.