Lost a Filling or Crown? What to Do and When It’s an Emergency

A filling or crown that falls out should be checked by a dentist, even if the tooth does not hurt. The restoration may have come loose because of wear, decay, damage to the underlying tooth or changes in the material holding it in place.

How urgently you need care depends on your symptoms. A painless lost filling may sometimes be able to wait for the next available dental appointment, while significant pain, swelling, bleeding or a broken tooth deserves more prompt assessment.

The goal while you are waiting is simple: keep the area clean, avoid additional damage and do not attempt a permanent repair yourself.

Is a Lost Filling or Crown a Dental Emergency?

Not every lost filling or crown requires immediate emergency treatment. However, the exposed tooth should still be assessed because the remaining tooth structure may be sensitive, weakened or vulnerable to further damage.

Contact a dentist promptly if the lost restoration is accompanied by:

• Severe or increasing tooth pain
• Strong sensitivity that is difficult to manage
• Swelling around the tooth, gum, jaw or face
• A visible crack or broken piece of tooth
• Bleeding after trauma
• Pain when biting or difficulty chewing
• A crown that came off after an injury
• Signs that the remaining tooth is loose or damaged

If significant facial swelling affects your ability to breathe or swallow, if bleeding cannot be controlled, or if there has been serious trauma to the face or jaw, seek emergency medical care rather than waiting for a dental appointment.

What Should You Do if a Filling Falls Out?

If a filling falls out, gently rinse your mouth and keep the area as clean as you comfortably can. Avoid repeatedly touching the opening with your tongue or fingers.

The Ontario Dental Association advises people with a lost filling to arrange a dental visit as soon as possible. A small piece of softened sugar-free chewing gum may sometimes be used as a temporary cover until the tooth can be assessed.

While waiting for your appointment:

• Avoid chewing hard or sticky foods on the affected side.
• Keep food from becoming packed into the opening.
• Brush the surrounding teeth gently.
• Avoid very hot or cold foods if the tooth is sensitive.
• Do not try to permanently repair the tooth yourself.

If the tooth becomes painful, swollen or increasingly sensitive, arrange a more urgent assessment.

What Should You Do if a Crown Falls Off?

If a dental crown comes off, remove it from your mouth so it is not accidentally swallowed and keep it somewhere clean and safe. Bring it to your dental appointment.

Do not assume the crown can simply be put back on. The dentist needs to examine both the crown and the remaining tooth to determine why it came loose and whether either has been damaged.

Until you are seen:

• Avoid chewing on the affected tooth.
• Keep the area clean.
• Avoid hard, crunchy and sticky foods.
• Bring the crown with you to the appointment.
• Do not attach it with household glue or superglue.

Depending on the condition of the crown and tooth, the dentist may be able to re-cement the existing crown or may recommend another form of restoration.

Why Would a Filling or Crown Suddenly Fall Out?

There is no single reason. A restoration may become loose because of normal wear, decay around or underneath it, damage to the tooth, a strong bite, grinding or clenching, or failure of the material holding the restoration in place.

Sometimes the restoration itself is intact while the underlying tooth has changed. In other cases, part of the tooth may fracture along with the filling or crown.

This is why replacing the restoration without first examining the tooth may not solve the underlying problem.

What if the Tooth Does Not Hurt?

A lost filling or crown can be painless, particularly at first. Lack of pain does not necessarily mean the tooth can be ignored.

The remaining tooth may still be exposed to chewing forces, food debris, temperature changes or additional fracture. A dentist can determine whether the restoration simply needs replacement or whether the tooth underneath needs additional treatment.

If the problem is stable and painless, the next available dental appointment may be appropriate. If symptoms are developing or worsening, seek care sooner.

What if the Tooth Is Very Sensitive After the Filling or Crown Comes Off?

Temporary sensitivity can happen when previously covered tooth structure becomes exposed.

Avoid foods and drinks that trigger significant sensitivity and chew on the other side until the tooth has been examined.

Strong, persistent or worsening sensitivity can indicate that the tooth needs more than a simple replacement restoration. The dentist may need to assess the remaining tooth structure, decay, cracks and the health of the pulp inside the tooth.

If the problem involves a lost filling, you can learn more about dental filling treatment.

Can a Lost Filling Be Replaced?

Often, but the dentist first needs to determine why the previous filling came out and whether enough healthy tooth structure remains for another restoration.

A relatively small defect may be suitable for another filling. A tooth that has lost more structure or developed a significant crack may require a different restoration.

If decay or damage has reached deeper tissues inside the tooth, treatment may also need to address the pulp before the tooth can be restored.

Can a Crown That Fell Off Be Put Back On?

Sometimes an existing crown can be re-cemented, but this is not always possible.

The dentist will need to check whether:

• The crown still fits properly
• The crown itself is damaged
• The tooth underneath is fractured
• Decay has developed around the tooth
• Enough tooth structure remains to support the crown

If the crown cannot be predictably reused, a replacement may need to be considered.

For more information about this type of restoration, see our dental crown service.

Could a Lost Filling or Crown Lead to Root Canal Treatment?

Not automatically.

A lost restoration by itself does not mean the tooth needs root canal therapy. However, deeper decay, a significant crack or inflammation or infection involving the pulp may change the treatment plan.

The dentist needs to examine the tooth and may recommend dental imaging when clinically appropriate before deciding what treatment is necessary.

If the pulp is significantly affected and the tooth can be restored, root canal therapy may be one treatment option.

What if Part of the Tooth Broke Off With the Filling or Crown?

If you can see that part of the natural tooth broke away with the restoration, arrange an assessment promptly.

The treatment depends on how much tooth structure remains and how deeply the fracture extends. Some damaged teeth can be restored with a filling or crown, while deeper fractures may require more involved treatment.

Do not assume the tooth needs to be extracted before it has been examined.

If the tooth itself has fractured, see our guide to broken tooth emergencies and repair options.

Can You Temporarily Fix a Lost Filling or Crown at Home?

Home measures should only be considered temporary protection while you arrange professional dental care.

For a lost filling, the Ontario Dental Association suggests that softened sugar-free gum may be used temporarily in the opening until you can see a dentist.

Over-the-counter temporary dental repair products are also available in some pharmacies. If you use one, follow the product instructions carefully and understand that it does not replace an examination or permanent restoration.

For a lost crown, keep the crown safe and bring it to the dentist. Do not use superglue or other household adhesives.

When Should You See an Emergency Dentist for a Lost Filling or Crown?

A prompt assessment is more important when symptoms suggest that the problem involves more than the restoration itself.

Seek urgent dental care when you have:

• Severe or rapidly worsening pain
• Increasing gum or facial swelling
• Significant pain when biting
• Trauma to the tooth or face
• A fractured or loose tooth underneath the restoration
• Bleeding that continues around the damaged tooth
• Symptoms that are interfering significantly with eating or sleeping

If the problem happens outside regular appointment times, our guide to after-hours dental emergencies explains which symptoms may be able to wait and which deserve more urgent attention.

What Happens at the Dental Appointment?

The dentist will first examine the tooth and the surrounding area. Dental imaging may be recommended when it is clinically useful for understanding the remaining tooth structure, decay, a possible fracture or deeper involvement.

Depending on what is found, treatment may involve:

• Replacing a lost filling
• Repairing damaged tooth structure
• Re-cementing an existing crown when appropriate
• Making a new crown
• Treating deeper decay
• Root canal therapy when the pulp is significantly affected
• Another restorative treatment based on the condition of the tooth

The appropriate treatment cannot be determined from the appearance of the missing restoration alone.

Lost Filling or Crown and Need Dental Care Near North York?

Emergency Dental Office is located in Thornhill near North York. If your filling or crown has come out and the tooth is painful, damaged or becoming more sensitive, an examination can determine what happened and which repair options are appropriate.

If you need care without a previously scheduled routine visit, you can also review our walk-in dental care information.

For broader emergency guidance, see our dental emergency immediate-action guide.

Frequently Asked Questions About Lost Fillings and Crowns

Is a lost filling always an emergency?

No. A lost filling without significant pain or swelling may sometimes wait for the next available dental appointment. It should still be assessed because the exposed tooth can become sensitive or sustain additional damage.

Is a crown falling off an emergency?

Not necessarily. A painless crown that simply becomes loose is different from a crown lost because of trauma, decay or fracture. Significant pain, swelling or damage to the remaining tooth makes assessment more urgent.

Can I eat after a filling falls out?

You can usually eat, but avoid chewing directly on the affected tooth. Hard, sticky and very hot or cold foods may cause additional discomfort or damage.

Can I put my crown back on myself?

Keep the crown safe and bring it to your dentist. Whether it can be reused depends on the condition of both the crown and the tooth. Do not use household adhesives or superglue.

Why does my tooth hurt after my crown fell off?

The tooth underneath the crown may be sensitive because previously covered structure is now exposed. Pain can also be related to decay, a fracture or another dental problem, so persistent or severe pain should be assessed.

Will I need a new crown if mine falls off?

Not always. Some crowns can be re-cemented if they remain suitable and the tooth underneath is healthy enough to support them. Others need replacement.

Can a lost filling cause an infection?

A missing filling can expose damaged or decayed tooth structure and allow the underlying problem to progress. Whether infection is present requires a dental assessment.

Sources Reviewed

• Ontario Dental Association — Dental Emergencies
• NHS — Emergency and Urgent Dental Care Guidance
• NHS Wales — Lost Filling or Crown Guidance