Root canal treatment removes infection or damaged soft tissue from inside a tooth, then cleans, fills and seals the root canal system. It is often considered when a tooth can still be saved. If you have toothache, swelling or a suspected tooth infection, a dental examination is needed to confirm the safest next step.
This guide explains what to expect before, during and after treatment, when symptoms need prompt advice, and how Thames Street Dental can help patients considering root canal treatment in Kingston.
Root canal treatment, also called endodontic treatment, treats infection inside the tooth. The NHS explains that treatment removes infection from inside the tooth, then the tooth is cleaned and filled to help prevent it becoming infected again.
The soft tissue inside a tooth is called the pulp. It can become inflamed or infected after deep decay, gum disease, a cracked, chipped or broken tooth, trauma, repeated dental work, or a dental abscess. If an infected tooth is not treated, extraction may become necessary.
Not every painful tooth needs root canal treatment. Toothache can also come from a cracked filling, gum inflammation, grinding, sinus problems, an impacted wisdom tooth or sensitivity. That is why an examination and X-rays may be needed before advice is reliable.
Symptoms vary, and some infected teeth can be surprisingly quiet for a while. Common warning signs include:
The NHS advises seeing a dentist if toothache lasts more than two days, does not settle with painkillers, is linked with a high temperature, pain on biting, red gums, bad taste, or cheek or jaw swelling. If you need help with toothache in Kingston or a possible tooth infection, contact the practice for advice on the right appointment.
Safety note: go to A&E or call emergency services if swelling around the mouth, neck or eye makes it difficult to breathe, swallow or speak. For urgent dental problems when you cannot reach a dentist, NHS 111 can advise you what to do.
Before recommending root canal treatment, your dentist will usually ask about your symptoms, medical history and the tooth involved. They may examine the tooth, test how it responds, check the gums and take an X-ray to look at the roots and surrounding bone.
The appointment should also cover alternatives. Depending on the tooth and infection, options may include monitoring, stabilising the tooth, root canal treatment, referral for more complex endodontic care, or extraction if the tooth cannot be predictably restored.
The exact sequence depends on the tooth, but most root canal appointments follow a careful version of these steps:
The NHS notes that treatment usually takes two or more appointments, and that appointments may last one to two hours or sometimes longer. Thames Street Dental will explain the likely sequence for your tooth before treatment starts.
Many patients worry about discomfort because the tooth may already be painful before treatment. Local anaesthetic is normally used for root canal treatment, so the aim is to make the procedure manageable while the tooth is being treated. You may still feel pressure, vibration or awareness of the dentist working.
It is common for the area around the tooth to feel sore or tender afterwards, especially when the infection or inflammation was significant. The NHS advises that soreness should improve, and that pain relief such as paracetamol or ibuprofen may be appropriate for some people. Always follow the packet instructions and ask a pharmacist, dentist or doctor if you are unsure whether a medicine is suitable for you.
If pain worsens, swelling spreads, the bite feels very high, or you feel generally unwell after treatment, contact the practice or seek urgent advice.
When a tooth is infected, the broad choice is often between trying to save the tooth or removing it. The right answer depends on whether the tooth can be cleaned, sealed and restored well enough to function.
| Option | May be considered when | Points to discuss |
|---|---|---|
| Root canal treatment | The tooth can be accessed, cleaned, sealed and restored. | Complexity, number of appointments, restoration, long-term maintenance and possible referral. |
| Extraction | The tooth is too damaged, fractured, unsupported or unsuitable for root canal treatment. | Healing, replacement options, neighbouring teeth, bite changes and future costs. |
| Restoration after root canal | The treated tooth needs protection after infection is removed. | Whether a filling or dental crowns option is more appropriate. |
Saving a natural tooth can be valuable where the tooth has a good outlook, but it is not always possible. Your dentist should explain the limitations, likely restoration needs and alternatives before you decide.
After root canal treatment, your jaw and face may feel numb for several hours while the anaesthetic wears off. The treated area may feel tender or swollen and should gradually settle. Recovery advice may include:
Fees depend on the treatment plan and any restoration needed afterwards. You can use the treatment fee guide as a starting point, but an individual estimate needs an assessment.
These guides may help if you are deciding how urgently to seek advice or comparing tooth pain symptoms.
Useful if tooth pain is persistent, severe or disrupting sleep while you wait for dental advice.
A broader guide to common reasons teeth hurt, from decay and cracks to gum problems.
Read this if you have swelling, trauma, severe pain or symptoms that may need urgent triage.
You cannot know for certain without a dental assessment. Persistent toothache, pain when biting, lingering hot or cold sensitivity, swelling, a bad taste or a gum lump can all suggest infection or inflammation that needs checking.
The NHS says root canal treatment usually takes two or more appointments, though this depends on the tooth, infection, anatomy and restoration needed afterwards.
It depends on whether the tooth can be predictably saved and restored. Root canal treatment may preserve a natural tooth, but extraction may be more appropriate if the tooth is badly cracked, unsupported or unrestorable.
Contact a dentist promptly for swelling linked to toothache or infection. Seek emergency help if swelling affects the eye or neck, or makes breathing, swallowing or speaking difficult.
Tenderness can last for a few days and should gradually improve. The NHS notes that soreness around the tooth should get better, but you should seek advice if symptoms worsen or swelling spreads.
Some teeth need a crown after root canal treatment, especially if they were badly infected, heavily filled, cracked or are back teeth under chewing pressure. Your dentist will explain whether a filling or crown is more suitable.
Thames Street Dental can assess the tooth, explain whether root canal treatment is suitable, and discuss alternatives if another option would be safer for your situation.
020 8546 6546
