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Root Canal Treatment

Restorative dentistry in Truro

Treat the cause.Keep the tooth.

Root canal treatment removes inflamed or infected tissue from inside a tooth. The canals are cleaned, disinfected and sealed so the tooth can remain in place where this offers a predictable option.

Diagnosis firstLocal anaestheticTooth-preserving care
Clinical cutaway illustration showing decay extending through enamel and dentine into an inflamed dental pulp and root canalsDecayExtending towards the pulpEnamelThe hard outer layerDentineThe supporting tooth structureInflamed pulp / nerveThe living tissue inside the tooth
Understand the toothSymptoms, examination and X-rays are considered together.
Keep treatment comfortableLocal anaesthetic is used to make the tooth numb.
Control contaminationA rubber dam keeps the treatment area clean and protected.
Protect the resultThe final restoration is planned around the tooth and bite.

Pain is one clue. It is not the diagnosis.

Deep decay, a crack, trauma or a leaking restoration can inflame or infect the pulp inside a tooth. Some teeth become painful, while others change quietly and are found during an examination.

Before recommending root canal treatment, we assess the pulp, roots, surrounding tissues and whether the tooth can be restored well afterwards. We will explain the diagnosis, alternatives and expected outlook before you decide.

In selected vital teeth where the pulp may still heal, Biodentine vital pulp therapy may offer a more conservative way to preserve living tissue.

01

Lingering sensitivity

Hot or cold pain that continues after the stimulus has gone is worth assessing.

02

Pain on biting

Tenderness or pressure may come from inflammation, a crack or another dental problem.

03

Swelling or a gum spot

Swelling, a bad taste or a recurring spot on the gum can be linked to infection around a root.

The treatment pathway

Clean. Seal. Protect.

Each stage matters. The exact number and length of appointments depends on the tooth, its anatomy and whether it has been treated before.

01 – ASSESS

Confirm the diagnosis

We examine the tooth, review suitable X-rays and decide whether it can be predictably restored.

02 – ISOLATE

Numb and protect

Local anaesthetic makes the tooth numb. A rubber dam isolates it from the mouth.

03 – DISINFECT

Clean and seal

The canals are carefully located, shaped, disinfected and filled to help prevent reinfection.

04 – RESTORE

Rebuild the tooth

A secure filling, onlay or crown protects the remaining tooth according to its structure and bite.

Carefully controlled treatment

Small spaces need precision.

Root canals are narrow and may curve, branch or be difficult to find. Magnification, suitable imaging and careful cleaning help us treat the internal space while preserving as much sound tooth as possible.

Rubber damA protective sheet isolates the tooth, reduces contamination and prevents small instruments or liquids entering the mouth.
Dental X-raysX-rays help with diagnosis, working length, checking the root filling and longer-term review.
Complex casesVery curved canals, retreatment, cracks or difficult anatomy may need additional assessment or referral.
ReviewHealing around the root takes time. A follow-up examination and X-ray may be advised.
Clinical comparison showing gutta-percha filling the root canals, a sealed tooth-coloured access filling and a full ceramic crownRoot filling + access sealFull ceramic crown

After root canal treatment

The restoration is part of the treatment.

The coral material represents gutta-percha filling the cleaned canals. A bonded filling or core seals the entire access above it before the final restoration. This coronal seal helps prevent bacteria entering again, while an onlay or crown can protect weakened tooth tissue during biting.

1

Front teethA bonded restoration may be sufficient where enough sound tooth remains and the bite is favourable.
2

Back teethAn onlay or crown is often considered when one or more cusps are weakened or walls are missing.
3

Every tooth is differentWe aim to conserve sound tissue and choose the least invasive predictable restoration.

Explore zirconia and e.max crowns and onlays

Common questions

Root canal FAQs.

Will root canal treatment hurt?

The tooth is made numb with local anaesthetic, so you should not feel pain during treatment. You may notice pressure or movement. Some tenderness afterwards is normal and should gradually settle.

What is a rubber dam?

A rubber dam is a small protective sheet placed around the tooth. It helps keep the canal system clean and dry, prevents saliva entering the tooth and protects your mouth during treatment.

How many appointments will I need?

Some teeth can be treated in one visit. Others need two or more appointments, particularly when there is infection, complex anatomy or previous root canal treatment. The final restoration may be a separate appointment.

Will I need a crown afterwards?

Not every root-filled tooth needs a crown. Back teeth and teeth with missing walls more often need an onlay or crown to protect weakened cusps. We will assess the remaining tooth and your bite before recommending a restoration.

Does root canal treatment always work?

No dental treatment is guaranteed. Canal anatomy, infection, cracks, previous treatment, the final restoration and maintenance all influence the outcome. If symptoms or infection persist, options may include retreatment, apicectomy or extraction.

What if the tooth has already had root canal treatment?

A previously treated tooth can sometimes be retreated, but removing old materials and locating missed or altered canals can be more complex. We will assess the restoration, roots and surrounding tissues and explain whether retreatment, apicectomy or another option is reasonable.

Will I need X-rays?

Yes. Suitable dental X-rays are normally needed to diagnose the problem, understand the roots, check treatment and review healing. For selected complex teeth, a three-dimensional CBCT scan may be considered when the extra information could change the treatment plan.

Start with a diagnosis

Concerned about a tooth?

Book an examination so we can assess the tooth and explain the sensible options. If you have significant pain or swelling, please call reception so we can guide you to the right appointment.

Google reviews

What our patients say.

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Samuel Stephens profile picture
Samuel Stephens
10 November 2026
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Great service and fairly priced. Brian was a very knowledgeable guy and made me feel very relaxed
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paul clayton profile picture
paul clayton
10 November 2026
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Very modern practice, staff extremely polite and helpful and my treatment was professional and reassuring . Been with the dentist 18 years and would definitely recommend .
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Chris Sherin profile picture
Chris Sherin
3 November 2026
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Brian Needham and his long suffering wife are a great team within the practice. Brian says it like it is and gives a feeling of confidence in his analysis of my dental health.
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Barbara Dunford profile picture
Barbara Dunford
3 November 2026
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Pleasant, empathetic staff . Helpful in emergency. Very smart new surgery rooms.
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Nigel East profile picture
Nigel East
30 October 2026
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Hygienist appointment today.I have been a patient at The Treatment Centre for many years. Consistently excellent in all aspects of dental care.
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Sally Newman profile picture
Sally Newman
29 October 2026
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An emergency appt due to tooth ache, all sorted. Very professional and friendly.
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Paige Hazelwood profile picture
Paige Hazelwood
29 October 2026
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I was seen for an emergency appointment via 111, Dr Edward Janssen was incredibly kind, professional and thorough, making sure all my (many) questions were answered. I have Ménière’s disease, he checked whether I was comfortable reclining in the chair — a gesture of consideration that instantly put me at ease. It didn’t matter this wasn’t my regular practice/dentist, I was taken seriously and my concerns were checked thoroughly. The whole team were lovely, including the friendly reception staff. couldn’t recommend this practice more
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Lorraine Crumpler profile picture
Lorraine Crumpler
27 October 2026
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Very pleasant experience as usual and staff very welcoming and treatment was good.
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Nick Bailey profile picture
Nick Bailey
26 October 2026
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Emergency treatment was very welcome and timely involving some root canal work. For short notice this was excellent and a real relief.
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Paul Morley profile picture
Paul Morley
22 October 2026
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Sue is always very caring. She explains everything she does as she goes along. Can’t fault.
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