Written by Dr James Tran — principal dentist, Lumi Dental.
The quick answers
- A root canal removes infected tissue from inside a tooth so the tooth can stay.
- Done under local anaesthetic, it's typically no more uncomfortable than a deep filling.
- Typical Sydney cost: approximately $1,100–$2,800 per tooth, depending on which tooth.
- Most back teeth need a crown afterwards — a separate cost of approximately $1,500–$2,500.
If you've been told you might need a root canal, you probably have two questions: will it hurt, and how much will it cost? This guide walks through what the treatment actually involves, when it's the right option, and typical costs in Sydney.
What a root canal actually does
A root canal removes infected or inflamed tissue from inside a tooth, cleans the empty space, and seals it so the tooth can stay in your mouth instead of being pulled out.
The proper clinical name is endodontic treatment — "endo" meaning inside, "dontic" meaning tooth.
Why a tooth needs one
Teeth look solid from the outside. The centre, though, is soft tissue called the pulp — nerves and blood vessels.
When deep decay, a crack, or repeated dental work lets bacteria reach the pulp, the pulp becomes inflamed or infected. Once that happens, the tooth can't heal on its own.
The choice then is either to clear out the infected tissue with a root canal, or to remove the whole tooth.
What's inside the tooth
Each tooth has one or more narrow channels — the root canals — running from the pulp chamber down through each root.
Front teeth typically have a single canal. Premolars have one or two. Molars usually have three or four. The number of canals affects how long the appointment takes and how much the treatment costs.
Signs you may need a root canal
Not every toothache is a root canal. Common indicators include:
- A persistent deep ache, often worse at night or when lying down
- Sharp pain when biting or putting pressure on one tooth
- Hot or cold sensitivity that lingers more than a few seconds after the stimulus is removed
- A pimple-like bump on the gum near a tooth (often a draining infection)
- A tooth that has darkened compared with its neighbours
- Swelling in the gum, face, or jaw
These symptoms overlap with other problems — a cracked tooth, a high filling, or gum disease. The only reliable way to diagnose a pulp problem is a clinical exam and a dental x-ray, and sometimes a specific nerve test.
For a broader symptom guide, see why a tooth hurts when biting down and tooth pain at night.
What happens at the appointment
Most root canals are completed in one or two visits, each 60 to 90 minutes.
Before treatment
Your dentist takes x-rays, examines the tooth, confirms the diagnosis, and explains the plan.
You receive a written quote, estimated appointment time, and information about sedation options.
During treatment
The tooth is numbed with local anaesthetic — the same way it is for a filling.
A small rubber sheet (a dental dam) is placed around the tooth to keep the area clean and isolated.
The dentist opens the top of the tooth, removes the inflamed or infected pulp, shapes and disinfects the canals, and fills them with a rubber-like material called gutta-percha.
After the nerve is removed
The tooth is sealed with a temporary or permanent filling.
Back teeth are usually fitted with a crown afterwards to protect the tooth from fracturing under chewing forces.
Does a root canal hurt?
Modern root canal treatment is typically no more uncomfortable than a deep filling, because the tooth is fully anaesthetised during the procedure.
Most of the pain people associate with root canals is actually the pain before treatment — the infected pulp itself.
After the appointment, mild tenderness for two to five days is normal, particularly when chewing. Over-the-counter pain relief is usually enough. Severe, worsening pain after a root canal is not typical and should be reviewed.
If dental anxiety is a barrier, IV sedation is an option. See our IV sedation dentistry guide.
Root canal vs extraction
Removing a tooth is almost always cheaper in the short term. The longer-term picture is more complex, and the right choice varies by individual case.
Keeping the tooth preserves natural chewing, maintains the shape of the jaw bone, and avoids follow-on work.
Removing the tooth is simpler and cheaper up front, but most back teeth need to be replaced with an implant, bridge, or partial denture to prevent neighbouring teeth from drifting. The replacement cost typically exceeds the cost of saving the tooth.
A tooth is usually not savable if it has a vertical root fracture, insufficient remaining structure to rebuild, or advanced surrounding bone loss. Your dentist should walk you through both options with x-rays on screen.
Cost of a root canal in Sydney
Costs typically fall within the following ranges — guided by the ADA NSW fee survey and comparable local providers — and vary by individual case.
- Front tooth (incisor or canine): approximately $1,100 – $1,800
- Premolar: approximately $1,400 – $2,200
- Molar: approximately $1,800 – $2,800
- Specialist endodontist retreatment or complex case: approximately $2,500 – $3,800
These figures cover the root canal itself. Most back teeth require a crown afterwards — a separate cost of approximately $1,500 – $2,500 per crown depending on material.
What changes the price
- Number of canals. A front tooth has one; a molar has three or four. More canals mean a longer appointment.
- Retreatment. A tooth that has been treated before is more technically demanding and usually costs more.
- Who performs the treatment. A general dentist handles most cases; complex or re-treated cases may be referred to a specialist endodontist.
- Imaging. A 3D scan (CBCT) is sometimes needed and adds to the cost.
Health fund rebates and payment
Most private health funds with extras cover a portion of endodontic treatment under item numbers 411, 414, 415, 416, 417, 419. Rebates vary widely by fund and level of cover.
At Lumi Dental, HICAPS allows your rebate to be claimed on the spot, so you only pay the gap. Payment plans are available through Afterpay and Humm.
Recovery and aftercare
- Numbness wears off over two to four hours. Avoid chewing on that side until sensation returns.
- Mild tenderness when biting for two to five days is normal.
- Soft diet for 24 hours; avoid very hot food.
- Brush and floss as usual — the treated tooth is not fragile in a cleaning sense.
- Take any prescribed antibiotics as directed. Antibiotics are not routine for every root canal.
- Book the permanent filling or crown within the window your dentist recommends. A temporary seal is not designed to last indefinitely, and an unprotected back tooth is at risk of fracture.
Do you need a crown after a root canal?
For back teeth (molars and most premolars), a crown is strongly recommended. Root-treated back teeth carry most of the chewing load and are more likely to fracture without full cusp coverage.
Front teeth with small access cavities often do well with a composite filling alone. Your dentist should give you a specific recommendation based on how much tooth structure remains.
What to expect at Lumi Dental
Root canal treatment at Lumi Dental starts with a thorough exam, x-rays, a clear written treatment plan, and an up-front quote.
Treatment is carried out under local anaesthetic with a dental dam, using rotary instrumentation and apex location for accuracy. For patients with significant anxiety, IV sedation is available with an independent sedationist present.
Follow-up reviews are scheduled 6–12 months after treatment to confirm healing on x-ray.
Frequently asked questions
How long does a root canal last?
A well-treated and properly restored tooth can last many years. Longevity depends on how much original tooth structure remains, the quality of the final restoration, and the care the tooth receives afterwards.
Can I drive home after a root canal?
Yes, if the treatment is carried out under local anaesthetic only. IV sedation requires a responsible adult to escort you home and stay with you for the rest of the day.
Do I need antibiotics for a root canal?
Not routinely. Antibiotics are reserved for cases with facial swelling, systemic symptoms, or specific medical indications. Your dentist will advise.
Can a root canal fail?
Root canals can fail if bacteria remain in the canal system, if a new crack develops, or if the final restoration leaks. Retreatment, or a small surgical procedure at the root tip (apicoectomy), can often resolve the problem.
About the author
Dr James Tran is the principal dentist at Lumi Dental in Melrose Park, Sydney. He writes plainly about dental care so patients can make informed decisions without hype. Read more at drjamestran.com.au.
About Lumi Dental
Lumi Dental is a modern dental practice at Melrose Park Central, Melrose Park NSW 2114. We serve Melrose Park, Meadowbank, Ryde, Ermington, West Ryde, Denistone, and the wider Sydney area, with general dentistry, cosmetic dentistry, aligners and orthodontics, dental implants, IV sedation, emergency care, and family dentistry.
To book an assessment or ask a question, visit lumi.dental or call the clinic.
This article is general information and does not replace individual clinical advice. Fees are indicative ranges guided by the ADA NSW fee survey and comparable Sydney providers, and vary by individual case. Any treatment should be based on your own assessment and discussion with a qualified dental practitioner.
