If you have been told the nerve inside one of your teeth is inflamed or infected, root canal treatment is one way we may be able to keep that tooth rather than take it out. We will not tell you every tooth can be saved, because it cannot be. What we can do here is explain what saving a natural tooth really involves, how we decide whether a tooth is worth treating, and how root canal treatment in St Clair compares with having the tooth removed.

What does it mean to save a natural tooth?

Saving a tooth does not mean saving the nerve. We remove the inflamed, infected or dead pulp tissue from inside the tooth, then clean, shape and seal the root canal system so bacteria have nowhere to re-establish. What we keep is the structural part of your tooth: the crown you bite on, and the roots sitting in your jawbone.

We want to be straight with you about one thing. A root canal-treated tooth is not the same as an untreated healthy one. It no longer has a living pulp, so it will not respond to hot and cold the way it used to, and it still needs your daily cleaning and regular dental examinations, because decay, gum disease and fracture can all still affect it.

Whether we can keep it comes down to two questions. Is there enough sound tooth structure left for us to rebuild? And does the tooth have a reasonable outlook once we have rebuilt it?

When might we suggest root canal treatment?

We consider endodontic treatment when the dental pulp has become irreversibly inflamed, infected or has died. That usually follows deep decay, a crack or fracture, a knock to the tooth, repeated treatment on the same tooth, leakage around an old filling or crown, or heavy wear.

You might notice sensitivity to hot or cold that lingers, pain when you bite, toothache that starts for no obvious reason, pain that wakes you at night, swelling of the gum, a pimple-like spot on the gum, one tooth going darker, or swelling in your face.

None of that tells us anything definite on its own. Some teeth with significant pulp damage give no warning at all, and we only find them on a routine check or an X-ray, and those same symptoms can come from a cracked filling, a gum problem, your sinuses or grinding. We need to test the tooth and look at imaging before we can say.

How does a dentist decide whether the tooth can be saved?

This is the conversation that decides your options. At Dental Society, here is what we are weighing up:

• how far the decay or damage extends, particularly below the gum
• whether the tooth is cracked, and where the crack runs
• how much sound structure is left to hold a restoration
• the condition of the roots, and whether we can find and clean the canals
• the bone and gum support around the tooth
• whether the tooth has been root treated before
• what the tooth does in your bite
• what final restoration it would need, and whether that is achievable
• your general and oral health, and the outlook against the alternatives
• your own preferences, and the costs involved

We use standard X-rays routinely. Three-dimensional imaging such as CBCT shows root anatomy and surrounding bone in far more detail, and we may recommend it where it will genuinely change the diagnosis or the plan. Not every root canal needs it, and it involves a higher radiation dose than a standard dental X-ray, so we use it when it is clinically justified.

The word you will hear us use is restorable: enough healthy structure, above and below the gum, to support a restoration that will seal and hold. We often cannot judge that fully until we have cleared away the old filling and decay, which is why our opinion can change partway through. If it does, we will stop and talk to you.

Why keeping a suitable natural tooth can matter

Where your tooth is restorable, and the outlook is reasonable, keeping it can offer real advantages:

• you keep your own root, sitting where it has always sat
• contact with the neighbouring and opposing teeth stays as it is, so those teeth are less likely to drift or over-erupt
• your chewing pattern is largely undisturbed
• there is no immediate gap to manage
• you may avoid or postpone having to consider a bridge, an implant or a denture

That does not make root canal treatment the right answer every time. It is not always cheaper than taking the tooth out. It does not last forever nor protect the tooth from decay, gum disease or fracture down the track.

The differences between Root Canal Treatment and Extraction

These treatments have different goals, and one is not a lesser version of the other. Root canal treatment aims to keep a tooth we can rebuild. Tooth extraction removes a tooth we cannot predictably keep, or one you would rather not keep.

	Root canal treatment	Tooth extraction
Goal	Keep a restorable tooth and its roots	Remove a tooth that cannot be predictably restored
Appointments	Varies with the tooth, the anatomy, the infection and the restoration	Usually a single appointment, plus review
Afterwards	A definitive restoration is needed to seal and protect the tooth	Healing of the socket, then a decision about replacement
Replacing the tooth	Not required if the tooth is retained	May be recommended, depending on the tooth and your bite
Costs	Treatment plus the final restoration	Lower on the day in most cases, though replacement adds to the total if it is recommended
Suits	Teeth with adequate structure, support and access	Teeth that are badly broken down, split, or poorly supported

We would never describe an extraction as a failure. If a tooth is split vertically, has too little structure above the bone, or sits in bone already lost to gum disease, removing it can be the better decision rather than treating it and losing it anyway. Ask us for both plans in writing, including what replacing the tooth would cost if we recommend it.

What happens during root canal treatment?

A typical course of endodontic treatment at Dental Society runs like this:

1. we examine and test the tooth and take diagnostic images
2. we talk through the diagnosis, your options and the costs, and take your consent
3. local anaesthetic
4. we isolate the tooth, usually with a rubber dam
5. we make an access opening into the pulp chamber
6. we remove the pulp tissue, then clean and shape the canals
7. we disinfect and seal medication inside between visits where that is appropriate
8. we fill and seal the canals
9. we place a temporary or definitive restoration over the opening
10. we plan the final restoration and arrange your review

How many appointments that takes depends on which tooth it is, the canal anatomy, how much infection is present, whether it has been treated before, and what rebuilding it will involve. Once we have assessed your tooth, we can give you a realistic estimate for it.

Will it hurt?

The honest answer is that it varies, and we would rather say so than promise you something we cannot control.

We use local anaesthetic to numb the tooth and the tissue around it, and for most people the injection is the part they notice. Once the tooth is numb, most people describe pressure, vibration and movement rather than sharp pain. A tooth that is acutely inflamed or infected can be harder to numb fully and sometimes needs more anaesthetic, so please tell us straight away if you feel anything uncomfortable. We can stop at any point.

Tenderness for a few days afterwards, particularly when you bite, is common and usually settles. If dental anxiety is part of what has kept you away, tell us when you book so we can talk it through before you are in the chair.

What to expect afterwards

The anaesthetic will wear off over a few hours, so take care not to bite your lip or cheek in the meantime. Tenderness when you bite, and a general awareness of the tooth for a few days, are both normal. If you have a temporary restoration, follow the advice we give you about what to eat and which side to chew on, and please keep the appointment for the definitive restoration.

How long can a root canal-treated tooth last?

There is no fixed lifespan, and we cannot honestly give you a number for your tooth. On average, 90 to 95 per cent of people who have root canal treatment can expect a functional tooth afterwards. That is an average across a great many teeth and circumstances, not a prediction for yours, and it says nothing about how many years.

Can problems come back later?

They can, and we would rather you heard that from us. New decay can undermine the restoration, the restoration itself can leak or break, the tooth can crack, infection can persist or recur, some canal anatomy can be too complex to reach, and gum disease can progress around a tooth that is otherwise sound.

If that happens, it does not mean the original treatment was done badly. Root canal systems are not simple tubes, and bacteria are persistent. If a treated tooth starts giving you trouble, we reassess it with imaging and look at the options: retreating the canals, a specialist opinion, endodontic surgery, a new restoration, or removing the tooth if it can no longer be held.

When we might refer you to an endodontist

An endodontist is a dentist with additional specialist training in problems of the dental pulp and the tissues around the root. We may suggest a referral for complex or calcified canals, retreatment of a previous root filling, a diagnosis that is not straightforward, dental trauma, complications such as a separated instrument or a perforation, or a case that may need surgery. If we refer you, it is a normal part of managing a difficult tooth, not a sign that something has gone wrong.

Questions worth asking before you decide

• Is this tooth restorable, and how confident are you about that?
• What is the expected prognosis, and what would change it?
• What are my alternatives, including doing nothing for now?
• How many appointments is my case likely to need?
• Will I need a crown, an onlay or a filling afterwards, and when?
• What happens if I choose extraction instead, and would you recommend replacing the tooth?
• What are the risks and limitations I should know about?
• Would a specialist opinion be appropriate here?
• What is the total cost of the complete plan, including the final restoration?

When to get seen promptly

Please book an urgent assessment for severe or worsening toothache, swelling of your gum or face, fever alongside dental symptoms, a knocked or broken tooth, or difficulty opening your mouth. Prompt assessment for severe dental pain or swelling usually leaves you with more options than waiting does.

If swelling is spreading quickly, or you have any difficulty swallowing or breathing, that needs urgent medical attention. Call 000 or go to your nearest emergency department rather than waiting for a dental appointment.

Considering root canal treatment in St Clair?

Keeping your own tooth can be well worth it when the tooth is restorable, the outlook is reasonable and the restoration that follows is planned properly. It is not the right call for every tooth, and weighing it against extraction only becomes a real comparison once we have examined and imaged yours.

If you have a tooth that is sore, sensitive, or that someone has already flagged as needing attention, our skilled team would be happy to look at it and talk you through your options.