Lost a Filling or Crown? Here's What You Should Do Next

Losing a filling or crown can be an unsettling experience, particularly if it happens unexpectedly — perhaps while eating, or in the middle of the night. The exposed tooth may feel sharp, sensitive or painful, and it is natural to feel uncertain about how serious the situation is and what to do next. Because different dental problems can present with similar sensations, it is not always straightforward to assess the cause or urgency without a professional examination. This article sets out what a lost filling or crown may mean, what steps may be appropriate while waiting for dental care, and when the situation may require more urgent attention.

Please note: Private Doctor London provides private testing and health-screening services — including blood tests, sexual health testing, allergy testing and health screening — but does not provide dental examinations, dental treatment or emergency dental care.

What Should You Do If a Crown or Filling Falls Out?

If you have lost a filling or crown, contact a GDC-registered dentist as soon as reasonably possible to arrange an assessment. In most cases, a lost filling or crown is not a life-threatening emergency, but prompt attention is advisable because the exposed tooth structure is vulnerable to further damage, sensitivity and bacterial entry. If you experience increasing facial swelling, difficulty breathing or swallowing, seek immediate medical help.

Prompt dental assessment may be appropriate if you have:

Lost a filling or crown and the tooth is causing significant or increasing pain
Noticeable sensitivity to hot, cold, air or pressure at the affected tooth
A sharp or jagged edge that is irritating the tongue, cheek or gum
Visible signs of decay or darkening within the exposed tooth cavity
Any facial or gum swelling alongside a lost restoration
Fever or feeling generally unwell in combination with dental pain

Symptoms alone cannot confirm the underlying dental condition. A dental examination — and, where appropriate, a dental X-ray — may be required to identify the cause and determine appropriate treatment.

Understanding What Happens When a Filling or Crown Is Lost

Fillings and crowns are restorations placed by a dentist to protect and restore teeth that have been damaged by decay, fracture or wear. A filling typically occupies a cavity within the tooth, whilst a crown encases the entire visible portion of a tooth above the gumline. Both types of restoration are designed to be durable, but they are not permanent and can become loose, crack or fall out over time.

When a restoration is lost, the tooth structure beneath is suddenly exposed. Depending on how deep the original cavity was, how much healthy tooth structure remains and whether any decay has continued to develop, the exposed dentine — the layer beneath the enamel — may be highly sensitive to temperature, air, sweet foods and pressure. In some cases, the nerve within the tooth may be close to the surface, which can cause sharp or throbbing discomfort.

For further detail on how lost or damaged dental restorations are assessed and managed, guidance on treating a lost filling or crown replacement is published by an emergency dental provider with clinics in London.

What Could Cause a Filling or Crown to Fall Out?

A restoration does not always fail because of a single identifiable cause. Several factors may contribute, and a dental examination is required to assess the specific situation. Common reasons include:

Recurrent decay beneath the restoration — bacteria can gradually undermine the bond between a filling or crown and the tooth, causing it to loosen over time.
Normal wear and ageing of the restoration — dental materials have a lifespan; older amalgam or composite fillings, and crowns more than ten to fifteen years old, are more likely to deteriorate.
Biting on hard foods or objects — accidentally biting on hard items such as ice, boiled sweets or an olive stone can dislodge or crack a restoration.
Teeth grinding (bruxism) — sustained grinding or clenching places considerable force on restorations and can accelerate their failure.
A poorly fitting or weakened restoration — if the original fitting was imprecise, or if the tooth structure supporting the restoration has been reduced by decay, the bond may be compromised.
Dental trauma — an impact to the face or mouth can dislodge a crown, particularly if it has already been weakened.
Gum recession or changes in tooth structure — the margin of a crown may lift away from the tooth if the surrounding gum tissue has receded.

It is important not to attempt to self-diagnose the cause. Several of these factors may coexist, and only a clinical assessment can determine what has occurred and what treatment is appropriate.

When Is a Lost Filling or Crown a Dental Emergency?

In most cases, losing a filling or crown is an urgent dental problem rather than a life-threatening medical emergency. However, the urgency depends on the degree of pain, the condition of the underlying tooth and whether there are any signs of spreading infection.

Seek same-day or next-available dental assessment if:

The tooth is causing moderate to severe pain that is not adequately controlled with over-the-counter pain relief
There is visible swelling around the tooth, gum or jaw
You can see signs of pus, or there is an unpleasant taste or smell suggesting infection
The sharp edge of the tooth or lost restoration is causing injury to your soft tissues
You are unable to eat or sleep because of the discomfort

The situation may be able to wait a short period — no more than a day or two — if:

There is only mild or occasional sensitivity
The tooth has no visible decay and is not causing significant pain
A temporary protective measure is in place and comfortable

Contact NHS 111 for guidance if:

You are in significant pain and cannot access a dentist promptly
You are unsure whether your symptoms require same-day assessment

When to Call 999 or Attend A&E

Call 999 or go to your nearest A&E immediately if you develop any of the following:

Difficulty breathing or swallowing
Rapidly increasing swelling of the face, mouth, jaw or neck
Swelling that is extending towards the eye
Severe facial trauma
Loss of consciousness
Heavy or uncontrolled bleeding from the mouth

These symptoms may indicate a serious spreading infection or other medical emergency and require immediate hospital-level care. Do not wait for a dental appointment if any of these warning signs are present.

What Can You Do While Waiting for Dental Care?

The following steps may help to reduce discomfort whilst you arrange dental assessment. These are temporary measures only and will not treat the underlying problem.

Keep the area clean — gently rinse the mouth with warm salt water (a teaspoon of salt dissolved in a glass of cooled boiled water) to help keep the exposed area clean. Avoid vigorous rinsing.
Avoid chewing on the affected side — using the damaged tooth to bite or chew may worsen sensitivity, cause further fracture or push debris into the exposed cavity.
Eat soft foods — choose soft foods and avoid very hot, very cold, sweet or acidic items that may trigger sensitivity.
Use a temporary dental repair product if appropriate — pharmacies stock temporary filling material and dental wax that can provide short-term protection for an exposed cavity or sharp edge. These products are for short-term use only and are not a substitute for professional care.
Manage pain with appropriate over-the-counter relief — paracetamol or ibuprofen, taken according to packet instructions, may help manage discomfort. Always check that a medicine is suitable for you before taking it. Many common pain relief medicines are unsuitable for children under certain ages, during pregnancy, for people with specific health conditions such as kidney or liver disease, or for those taking other medicines. Ask a pharmacist if you are unsure which option is appropriate.

Temporary self-care may reduce discomfort, but it cannot diagnose or treat the underlying dental problem. It is important to arrange professional assessment promptly.

What Should You Avoid?

Certain actions can worsen the situation and should be avoided:

Do not attempt to reattach a crown with household glue — household adhesives are not designed for oral use, may be toxic, and can cause further damage to the tooth or prevent proper recementation by a dentist.
Do not chew hard food using the affected tooth — this risks fracture of the remaining tooth structure.
Do not place aspirin directly on the gum or tooth — this can cause a chemical burn to the soft tissue.
Do not attempt to drain or burst any swelling around the tooth — this carries a serious risk of spreading infection and should only be performed by a dental professional in an appropriate clinical setting.
Do not assume that easing pain means the problem has resolved — pain can subside even when an infection or structural problem is progressing. Absence of pain does not mean the tooth no longer requires assessment.
Do not use antibiotics that were not prescribed for this specific problem — leftover antibiotics are not appropriate for dental infections and can mask symptoms without addressing the underlying cause.

What Might a Dentist Do?

When you attend a dental appointment following the loss of a filling or crown, the dentist will typically carry out a structured assessment. This may involve:

Reviewing your symptoms and dental history — the dentist will ask about the timeline, the nature and location of any pain, and your previous dental treatment.
Examining the mouth and affected tooth — a visual and tactile examination can identify decay, remaining tooth structure, gum health and soft tissue integrity.
Taking dental X-rays where appropriate — radiographs can reveal decay beneath the gumline, bone levels and the condition of the root and surrounding structures.
Discussing findings and treatment options — the dentist will explain what they have found and outline the possible treatment approaches, along with associated costs, before obtaining your informed consent.

Treatment options may include:

Replacement filling — cleaning out any decay and placing a new filling (temporary or permanent depending on the clinical situation).
Crown recementation — if the crown itself is undamaged and the underlying tooth is in good condition, the dentist may clean and recement the existing crown.
New crown — if the existing crown is damaged or poorly fitting, or if the underlying tooth structure has changed, a new crown may be required.
Root canal treatment — if the dental pulp (nerve) has been affected by decay, infection or trauma, further information on root canal treatment following a lost restoration may help explain why this step is sometimes necessary before a new restoration can be placed.
Extraction — if the tooth is too damaged or infected to be restored predictably, extraction may be the recommended option.

Treatment depends entirely on the clinical findings. It may not always be possible or appropriate to complete all treatment during the first appointment.

Can the Tooth Be Saved?

Whether a tooth can be restored after losing a filling or crown depends on a number of clinical factors. These include:

The extent of any underlying decay
How much healthy tooth structure remains above the gumline
Whether the dental pulp or root has been affected
The health of the surrounding gum and bone
The length of time the tooth has been unprotected
Whether infection is present and how far it has progressed
The predictability of a long-term restoration

A dentist can only assess these factors after a thorough examination, which may include X-rays. It is not possible to determine whether a tooth is restorable from symptoms alone. If you are concerned, seeking same-day emergency dentist appointment options in London as soon as possible can help to preserve the range of available treatment options.

Frequently Asked Questions

Is losing a filling or crown a dental emergency?

Losing a filling or crown is typically an urgent dental problem rather than a life-threatening emergency. However, the urgency depends on the level of pain, whether there is swelling or signs of infection, and how much tooth structure has been affected. Dental assessment is generally advisable within one to two days, sooner if symptoms are severe.

Can I wait a few days before seeing a dentist?

It may be reasonable to wait a short time if the tooth is only mildly sensitive and there is no pain, swelling or visible decay. However, leaving an exposed tooth unprotected for longer than necessary increases the risk of further damage, sensitivity and bacterial entry. Prompt assessment is always advisable.

Will the pain always get worse if I don't seek treatment?

Not necessarily — pain can fluctuate or subside even when an underlying problem is present. However, the absence of pain does not mean the dental problem has resolved. Decay and infection can progress without causing consistent symptoms. A dental examination remains necessary regardless of pain levels.

Should I go to A&E for a lost filling or crown?

A&E departments are not equipped to provide routine dental treatment. Attending A&E is appropriate only if you have difficulty breathing or swallowing, rapidly increasing facial swelling, severe trauma, or other medical emergencies. For dental pain and lost restorations without these warning signs, contact an appropriate dental provider or call NHS 111 for guidance.

Can an emergency dentist recement the original crown?

In some cases, yes — if the crown is undamaged and the underlying tooth is structurally sound, an emergency dentist may be able to clean and recement the existing crown. However, this depends on the clinical findings, and a new crown or alternative treatment may be required. Treatment options are confirmed only after examination.

What can I do to protect the tooth overnight?

Keep the area clean by gently rinsing with warm salt water. Avoid chewing on the affected side and eat soft foods. A temporary filling material or dental wax from a pharmacy may offer short-term protection. Take appropriate over-the-counter pain relief according to packet instructions, and confirm suitability with a pharmacist if you are uncertain.

Emergency Dental Care in London

If you have lost a filling or crown and require urgent dental assessment, contact an appropriate dental provider as soon as possible and describe your symptoms clearly so the team can advise on availability and next steps. Out-of-hours emergency dentist services in London may be a useful option for those who cannot arrange care during standard working hours. Current fees and appointment availability should be confirmed directly with the dental provider, as same-day appointments are subject to availability and clinical triage.

For general dental health questions, NHS 111 can also provide telephone guidance on whether your situation requires urgent dental attention and how to access appropriate care.

Medical and Dental Disclaimer

This article is for general informational purposes only and does not constitute medical or dental advice, diagnosis or treatment. Dental symptoms can have several possible causes and may require examination by a qualified dental professional. Seek urgent assistance if symptoms are severe or worsening. Call 999 or attend A&E if you experience difficulty breathing or swallowing, rapidly increasing facial or neck swelling, severe facial trauma, loss of consciousness or heavy uncontrolled bleeding. Private Doctor London provides testing and health-screening services and does not provide dental examinations, dental treatment or emergency care.