Most patients who need a root canal have no idea what one is until a dentist brings it up at an appointment. Understanding what a root canal treatment involves and recognising the symptoms that suggest you might need one means you are far less likely to be caught off guard. At Fitzroy Dental Practice in Fitzrovia, London, we find that patients who understand the warning signs tend to seek help earlier, when treatment is simpler, and outcomes are typically better.
What is a root canal, and what does the treatment actually do?
A root canal, also called root canal treatment or endodontic treatment, removes the soft tissue inside a tooth that has become infected or severely damaged. That soft tissue, known as the pulp, sits in a chamber at the centre of the tooth and extends down into the roots through narrow channels called root canals. When bacteria reach the pulp, usually through deep decay, a crack, or a damaged filling, the resulting infection causes significant pain and, if left untreated, can spread to the surrounding bone and tissue.
Root canal treatment cleans out the infected pulp, shapes and disinfects the canals, and seals the tooth to prevent reinfection. The goal is to save the natural tooth rather than extract it, preserving both the root and the bone surrounding it.
What does root canal surgery mean, and is it the same as root canal treatment?
Most patients encounter root canal treatment rather than root canal surgery. Treatment refers to the conventional procedure carried out through the crown of the tooth. Root canal surgery, sometimes called an apicoectomy, is a minor surgical procedure used when conventional treatment has not fully resolved an infection, typically because the tip of the root is affected. Your dentist or endodontist will recommend the appropriate approach based on clinical findings and imaging.
Is root canal treatment done in one appointment or multiple?
This depends on the severity of the infection and the complexity of the tooth. Simple cases on front teeth are often completed in a single appointment of one to two hours. More complex cases, particularly on back molars with multiple curved canals, or cases with significant infection, typically require two appointments. Your dentist will outline the expected number of visits at your assessment.
What are the main signs that you might need a root canal?
The symptoms that most commonly indicate pulp damage or infection include:
- Persistent toothache: a deep, throbbing ache that does not resolve on its own and may worsen when lying down or bending forward
- Prolonged sensitivity: sensitivity to hot or cold that lingers for more than a few seconds after the trigger is removed, rather than fading immediately
- Swelling in the gum or face: a raised, tender lump on the gum near the affected tooth, or visible swelling in the cheek or jaw
- Darkening of the tooth: a tooth that has progressively changed colour compared with surrounding teeth, often grey or brown, can indicate pulp damage
- Pain on biting or pressure: discomfort when chewing or pressing on the tooth suggests inflammation around the root tip
- A persistent bad taste or smell: this can indicate pus draining from an abscess through the gum
Not every case presents with obvious pain. Some pulp infections develop slowly and may cause minimal discomfort, which is one reason regular dental examinations and X-rays matter. Your dentist can identify changes at the root tip on a radiograph before symptoms become severe.
Can a tooth need root canal treatment with no pain at all?
Yes. A tooth with a longstanding, slow-developing infection may have a partially or fully non-vital pulp with relatively little pain, particularly if the nerve tissue has already died. The infection may only come to attention through a routine X-ray that shows a shadow at the root tip, indicating bone changes caused by the infection. This is another reason dental check-ups are worth attending even when teeth feel fine.
Is tooth pain always a sign of infection, or could it be something else?
Toothache has several possible causes, including cracked tooth syndrome, gum disease, a failing filling, dentine hypersensitivity, or referred pain from adjacent teeth. A thorough clinical examination, including vitality testing and X-rays, allows your dentist to distinguish between these causes accurately. Self-diagnosing based on symptoms alone is unreliable, and both undertreating and overtreating the wrong tooth carry real consequences.
What happens if a tooth that needs root canal treatment is left untreated?
Leaving a tooth with infected pulp untreated does not resolve the problem. The infection spreads through the root tip and into the surrounding bone, causing an abscess. As the infection progresses, it can cause significant bone loss around the root, damage adjacent teeth, and in more serious cases spread to the soft tissues of the face and neck. Dental abscesses that spread beyond the jaw are considered medical emergencies and require hospital treatment.
Beyond the health risk, delay typically makes treatment more complex and more expensive. A tooth that could have been saved with straightforward root canal treatment at an earlier stage may eventually require extraction if the infection destroys too much surrounding structure.
Should I take antibiotics instead of having root canal treatment?
Antibiotics can temporarily reduce the systemic effects of a dental infection, such as fever and swelling, but they do not clear the infection from inside the tooth. The pulp chamber has no blood supply once it becomes necrotic, which means antibiotics cannot reach the bacteria living inside it. Root canal treatment or extraction is always required to definitively resolve pulp infection. Antibiotics may be prescribed alongside dental treatment in specific circumstances, but they are not a substitute for it.
How much does root canal treatment cost in the UK?
Root canal treatment cost varies depending on which tooth is being treated and the complexity of the case. As a guide for private treatment in London:
- Front tooth (incisor or canine, typically one canal): approximately £500 to £900
- Premolar (one or two canals): approximately £700 to £1,100
- Molar (two to four canals, more complex anatomy): approximately £900 to £1,500
Under the NHS, root canal treatment falls within Band 2, which carries a fixed patient charge of £76.60, covering the treatment regardless of the number of canals. NHS availability in central London is limited, and many patients opt for private treatment for faster access and more appointment time.
A crown is typically recommended after root canal treatment on a back tooth to protect it from fracture, which carries a further separate cost. At Fitzroy Dental Practice, we provide a fully itemised written estimate before treatment begins.
Is root canal treatment worth the cost compared with extraction?
For most patients with a tooth that has a sound root and adequate surrounding bone, root canal treatment is worth the investment. Saving a natural tooth avoids the need for a replacement restoration, preserves the jawbone beneath the tooth, and maintains the alignment of surrounding teeth. The cost of root canal treatment and a crown is often comparable with or slightly higher than a dental implant in the short term, but the clinical calculus depends heavily on the individual tooth and surrounding structure. Your dentist will give you an honest assessment of whether the tooth is worth saving.
How painful is root canal treatment, and what should I expect during the procedure?
This is the question patients ask most often, and the honest answer is that modern root canal treatment under effective local anaesthetic is no more uncomfortable than having a filling placed. Most patients report feeling pressure and vibration but not pain during the procedure. The discomfort associated with root canal treatment in popular perception relates more to the infection that precedes it than to the treatment itself. Post-procedure soreness for two to four days, managed with ibuprofen and paracetamol, is typical for most patients.
If you have any of the symptoms described in this article and would like a thorough assessment, the team at Fitzroy Dental Practice is here to help. Visit our root canal treatment page or find us at 14 Fitzroy Square, Fitzrovia, London W1T 6AH. Call us on 020 7387 3317 or book online.
Common Questions Asked About Root Canal Symptoms
How do dentists decide if I need a root canal?
Dentists diagnose the need for root canal treatment by assessing your symptoms, examining the tooth, testing its response to hot or cold stimuli and taking dental X-rays. These findings help determine whether the pulp is irreversibly inflamed, infected or no longer viable.
What does the pain feel like if I need a root canal?
A tooth requiring root canal treatment often causes persistent or spontaneous pain, lingering sensitivity to hot or cold, or pain when biting or chewing. Some infections cause little or no pain, particularly after the tooth’s pulp has died.
What can be mistaken for needing a root canal?
Tooth decay, cracked teeth, gum disease, dental sensitivity and problems affecting surrounding tissues can cause symptoms similar to those requiring a root canal. Your dentist uses clinical examination, pulp testing and X-rays to identify the actual cause of tooth pain.
When is it too late to avoid a root canal?
It becomes too late to avoid root canal treatment when the tooth develops irreversible pulp damage or infection that requires removal of the affected pulp. If the tooth cannot be restored or has inadequate support, extraction rather than root canal treatment might be necessary.
What is the most common age to get a root canal?
There is no single age when root canal treatment is most common because dental decay, trauma and infection can affect adults at different stages of life. Your risk depends more on your dental health and history than your age.
