If a permanent crown falls off, keep the crown safe and contact a dental office for advice. Avoid chewing on that tooth, keep the area gently clean, and avoid foods or drinks that trigger sensitivity. Do not use household glue, force the crown into place, or treat putting it back as a permanent repair.
A lost crown needs professional assessment even when the tooth does not hurt. The crown may be reusable, but only an examination can show what happened to the crown, the tooth beneath it, and the material that held it in place.
First, check what you can see without testing the tooth
A crown is a cap that covers much of the visible part of a prepared tooth. When it comes off, you may find a hollow, tooth-shaped restoration in your mouth and notice a smaller or differently shaped tooth underneath.
That appearance does not prove that only the crown came loose. Part of the tooth, a filling beneath the crown, or another restoration may also have broken. A temporary crown can come off too, but it belongs to an active treatment plan and should be handled through the office that placed it. If you are unsure what came out, save the piece and describe what happened rather than trying to identify it yourself.
Do not probe the tooth, scrape inside the crown, or repeatedly test whether the crown still fits. Dental Crowns: Why a Tooth Might Need More Coverage owns the broader explanation of what crowns do; this guide stays with the immediate lost-crown decision.
What to do now
1. Keep the crown safe
If the crown is completely out of your mouth, place it in a clean, secure container and take it to the dentist. Do not throw it away. A dentist may be able to reuse it if it still fits and the tooth is suitable, but reuse is not guaranteed.
If the crown is still partly attached, do not keep wiggling it or bite down to push it back. Tell the dental office that it is loose and whether it feels mobile enough to become a swallowing or choking concern. If a crown or fragment is inhaled, or you are choking, seek emergency help.
2. Contact a dental office
Call the office that placed the crown when practical, or another dental service if that office is unavailable. Tell them when it came off and whether you have pain, sensitivity, swelling, a bad taste, difficulty chewing, a bite change, a broken-looking tooth, or a recent injury.
Do not wait for pain before making contact. Current urgent-care guidance includes broken, loose, or displaced crowns among problems that need dental advice, but the appropriate timing depends on symptoms, injury, health history, and whether anything poses an airway risk. A general article cannot promise one appointment window for everyone.
3. Protect the tooth while you wait
Keep brushing twice a day with fluoride toothpaste, including around the affected tooth, but use a gentle touch if the area is tender. Do not dig around the tooth with a pin, toothpick, or other sharp object.
Avoid biting hard foods with the affected tooth. Choose foods that need less chewing force and use the other side when practical. If hot or cold foods and drinks cause sensitivity, avoid those triggers until the area is assessed.
Sensitivity, pain, or no pain at all cannot tell you whether the problem is limited to the crown. What Causes Tooth Sensitivity? explains why several dental changes can produce similar sensations.
Can you put the crown back temporarily?
Do not force the crown onto the tooth or bite it into place. Never use super glue, craft glue, nail products, or another household adhesive in your mouth. These products are not a substitute for dental cement, and an apparently secure crown can hide a poor fit, a bite problem, damage, or a change in the tooth underneath.
Public guidance supports keeping the crown safe because a dentist may be able to recement it after assessing the tooth and fit. It does not establish that every lost crown is safe for a reader to reattach at home. The safest general boundary is to keep the crown in its container unless a dental professional who understands your situation gives specific short-term instructions. If the office discusses a temporary dental product, follow its case-specific and label directions; do not improvise, force a crown that does not settle easily, or assume temporary retention resolves the problem.
This is different from a temporary crown placed during planned care. If that is what came off, What Is a Temporary Filling or Temporary Crown? explains why the treating office’s instructions control.
When prompt dental advice matters
Tell the dental service promptly if:
- pain is severe, worsening, persistent, or interfering with sleep or daily activities;
- the tooth hurts when you bite, looks broken, or the crown came off after an injury;
- swelling appears or is increasing;
- you have a fever, bad taste, drainage, or difficulty opening your mouth;
- the crown is partly attached, very mobile, or could become a choking concern; or
- a sharp edge is injuring your tongue or cheek.
These changes can affect triage, but they do not diagnose an infection, crack, or other cause. What Does It Mean If My Tooth Hurts? and Cracked Tooth Basics retain the broader pain and crack explanations.
When emergency medical help matters
Most lost crowns are handled through dental care rather than a hospital emergency department. Seek emergency medical help now for difficulty breathing, speaking, or swallowing; severe or rapidly spreading swelling of the mouth, face, throat, or neck; swelling or pain around an eye with vision changes; heavy bleeding that will not stop; or a serious facial or head injury.
Get emergency help if you are choking or think the crown or another fragment was inhaled. Oral Compass Emergency Guidance owns the complete emergency-routing framework.
What the dentist may need to determine
A dentist may assess the crown, the remaining tooth, nearby gums, symptoms, bite, and any material still attached. Imaging may be useful in some situations. The aim is to determine whether the crown still fits, whether the tooth or foundation beneath it changed, and what care is appropriate.
Depending on the findings, the dentist may be able to recement the crown, make a temporary repair, replace the crown, or discuss other care for the tooth. This article cannot predict which option fits. How Do Dentists Monitor Existing Fillings and Crowns? explains how history, examination findings, and imaging can be combined without treating any one finding as an automatic answer.
Takeaway
When a permanent crown falls off, keep it safe and contact a dental professional even if the tooth is painless. Keep the area gently clean, reduce chewing force, and avoid sensitivity triggers. Do not force the crown back or use household adhesive. Whether the crown can be reused or temporarily retained depends on professional assessment and case-specific advice.
Sources
- Cracked, fractured, loose or displaced tooth fragments and restorations — Scottish Dental Clinical Effectiveness Programme
- Lost Filling or Crown — NHS 111 Wales
- How to find an emergency or urgent NHS dentist appointment — NHS
- Clinical guidance: unscheduled urgent and non-urgent dental care — NHS England
- Dental crown procedure — Healthdirect Australia
- Dental abscess — NHS
- Super glue — Queensland Government