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Describe whether pain is spontaneous, triggered by temperature or associated with swelling.
Emergency
Root Canal Treatment
Treat inflammation or infection inside a restorable tooth.
Emergency root canal treatment may relieve pressure and remove inflamed or infected pulp while preserving a tooth that can still be restored. Assessment determines whether it is suitable.
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Emergency root canal treatment aims to preserve a restorable tooth.
Dental pulp inside the tooth contains nerves and blood vessels. Deep decay, a crack, trauma or a leaking restoration can leave this tissue irreversibly inflamed or infected, sometimes causing spontaneous pain, lingering sensitivity or tenderness when biting.
Root canal treatment removes the damaged tissue, disinfects the canal system and seals the space. An urgent appointment may begin this process and relieve pressure, but the tooth often needs further visits and a durable final restoration.
Common signs
Lingering temperature pain
Pain can continue long after a hot or cold stimulus is removed.
Spontaneous or night pain
The tooth may throb without a clear trigger and interrupt sleep.
Pain when biting
Inflammation around the root can make the tooth tender to pressure.
Swelling or a gum spot
A recurring spot, discharge or swelling can indicate infection around the root.
Possible root canal pain? Do these things now.
Symptoms can change quickly, so arrange an assessment rather than waiting for the nerve to settle by itself.
Protect the tooth
Avoid chewing hard foods on the painful side, particularly if the tooth is cracked or heavily filled.
Manage pain safely
Use pain relief only if suitable for you and follow packet or pharmacist guidance.
What to avoid
- Do not put aspirin directly on the tooth or gum.
- Do not delay because the pain suddenly stops; the nerve may have died while infection remains.
- Do not use antibiotics left over from another illness.
When is infected-tooth pain an emergency?
Severe pain and spreading infection symptoms need prompt assessment.
Facial swelling
Swelling beside the tooth or into the face may indicate an abscess.
Fever or illness
Feeling feverish or markedly unwell can indicate infection is spreading.
Breathing or swallowing difficulty
Call 999 or attend A&E if swelling compromises breathing or swallowing.
Unmanageable pain
Pain preventing sleep or normal activity despite suitable relief should be assessed urgently.
Not sure whether it can wait?
Our emergency dental team can help you understand whether you need to be seen urgently.
What happens if I delay treatment?
Inflamed or infected pulp cannot reliably heal once damage is advanced.
- Infection may spread through the root into surrounding bone.
- An abscess and facial swelling may develop.
- The remaining tooth structure may weaken further.
- A restorable tooth may eventually require extraction.
What happens during emergency root canal treatment?
The dentist examines the tooth, carries out pulp or biting tests where useful and takes X-rays to assess the roots and surrounding bone. Root canal treatment is recommended only when the diagnosis and restorability make it appropriate.
Emergency pain-relief stage
The dentist may access the tooth, remove inflamed tissue and place a temporary dressing to relieve pressure and pain.
- local anaesthetic
- cleaning of the root canal space
- temporary seal between visits
Complete root canal treatment
The canals are shaped, disinfected and filled before the tooth receives a durable restoration.
- root canal filling
- core restoration
- crown or onlay where additional protection is needed
Alternative treatment
If the tooth is fractured beyond repair or has a poor prognosis, extraction may be discussed.
After root canal treatment
- Mild tenderness can occur; follow the advice provided for pain relief.
- Avoid heavy biting on a temporary restoration.
- Complete the planned treatment and final restoration to protect the tooth.
Protecting the tooth long term
- Maintain the final filling, onlay or crown with effective cleaning.
- Attend review appointments when advised.
- Use protection against grinding or sports trauma where relevant.
Related emergency dental guidance
These pages explain closely related symptoms and treatments without replacing a dental assessment.
Common questions
Clear answers to questions patients often ask before an urgent dental assessment.
An emergency dentist may be able to begin or complete root canal treatment when the diagnosis, tooth and available clinical time make it appropriate. Some teeth require staged care or referral for more complex treatment.
Lingering temperature pain, spontaneous night pain, tenderness when biting or infection near a tooth can be associated with pulp damage. These symptoms are not diagnostic, so examination, tests and X-rays are needed.
Root canal treatment aims to remove inflamed or infected pulp and address that source of pain. Symptoms and healing vary, and temporary tenderness can occur after treatment.
Some infected teeth can be preserved with root canal treatment if enough sound tooth and support remain for a predictable restoration. Deep fracture, extensive damage or poor support may make retention unsuitable.
Extraction may be considered when the tooth cannot be predictably restored or when removal is the chosen option after informed discussion. Root canal treatment and extraction have different consequences and are not interchangeable in every case.
No. An urgent visit may remove inflamed tissue, clean part of the canal system and place a temporary seal. Further treatment and a final restoration are often needed to protect the tooth.
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Other emergency dental problems we treat
Explore guidance for other common dental emergencies, including symptoms, what to do immediately and when to seek urgent dental care.
Swelling or dental abscess
Swelling, tenderness or a bad taste may indicate an infection that should be examined promptly.
Broken or chipped tooth
Assessment and repair options for a tooth damaged by an accident, impact or biting.
Toothache and severe tooth pain
Persistent, throbbing or night-time tooth pain needs assessment to identify its cause and urgency.
Lost filling or crown
Protect an exposed or sensitive tooth and arrange an assessment before further damage occurs.
Wisdom tooth pain
Help for pain, swelling or infection around an emerging or impacted wisdom tooth.
Emergency tooth extraction
When a tooth cannot be restored, an urgent assessment can establish the safest next step.
Loose implant crown or lost veneer
Careful assessment distinguishes a loose implant restoration, a moving implant and a detached veneer.
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