Root Canal Treatment — What It Is, When You Need It, and Why It’s Not as Bad as You Think
Root canals have a reputation problem. For decades, “I’d rather have a root canal” has been shorthand for the worst thing imaginable. The reality is very different. Modern root canal treatment is no more uncomfortable than having a filling, and it saves teeth that would otherwise need to be extracted.
At Compass Dental in Darwin, Dr Thien Pham performs root canals regularly. Here is what you actually need to know.
What Is a Root Canal?
Inside every tooth, beneath the hard enamel and dentine, is a soft tissue called the pulp. The pulp contains nerves, blood vessels, and connective tissue. It is essential during tooth development but once a tooth is fully formed, it can survive without the pulp.
A root canal removes the infected or damaged pulp, cleans and shapes the inside of the tooth, and fills it with a biocompatible material. The tooth is then sealed with a filling or crown.
The result: you keep your natural tooth. The infection is gone. The pain stops.
When Is a Root Canal Needed?
The pulp inside your tooth can become infected or inflamed due to:
- Deep decay that has reached the pulp
- A cracked or fractured tooth that exposes the pulp
- Repeated dental procedures on the same tooth
- Trauma (a blow to the tooth, even years earlier)
Signs you may need a root canal:
- Severe, persistent toothache — especially throbbing pain that wakes you at night
- Prolonged sensitivity to hot or cold that lingers after the stimulus is removed
- Darkening of the tooth
- Swelling or tenderness in the gum near the affected tooth
- A pimple (fistula) on the gum that may ooze pus
- Pain when biting or pressing on the tooth
Important: Sometimes a tooth that needs a root canal has no symptoms at all. This is why regular check-ups with X-rays are important — they can detect infections before they cause pain.
The Procedure — Step by Step
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Anaesthesia. The tooth is completely numbed with local anaesthetic. You should feel no pain during the procedure. If you are anxious, happy gas or IV sedation is available.
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Access. A small opening is made in the top of the tooth to reach the pulp chamber.
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Cleaning and shaping. Using tiny specialised instruments, the infected pulp is removed and the root canals are cleaned, shaped, and disinfected. This is the most time-consuming step.
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Filling. The cleaned canals are filled with a rubber-like material called gutta-percha and sealed.
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Restoration. A temporary filling is placed. In most cases, you will need a crown to protect the tooth long-term, as root-canal-treated teeth become more brittle over time.
Time: Most root canals take 60 to 90 minutes per appointment. Front teeth (with one canal) are quicker. Back teeth (molars with 3 to 4 canals) may require two appointments.
Does It Hurt?
During the procedure: No. The tooth is fully anaesthetised. Most patients say it feels similar to having a filling — there is pressure but no pain. The whole point of a root canal is to eliminate pain, not cause it.
After the procedure: Mild soreness for 2 to 3 days is normal, particularly when biting. Over-the-counter pain relief (ibuprofen and paracetamol) is usually sufficient. Severe pain after a root canal is uncommon — if it occurs, contact us.
The irony: The tooth that needed a root canal was probably already causing you significant pain. Most patients feel dramatically better within 24 hours of treatment.
Root Canal vs Extraction — Why Save the Tooth?
When a tooth is severely infected, you have two options: root canal (save the tooth) or extraction (remove it). Here is why we almost always recommend saving it:
| Factor | Root Canal + Crown | Extraction + Implant |
|---|---|---|
| Keeps your natural tooth | Yes | No |
| Treatment time | 1-2 appointments + crown | 6-12 months (healing + implant) |
| Cost | $1,500-3,500 | $4,500-6,500 |
| Adjacent teeth affected | No | No |
| Bone preservation | Natural root preserves bone | Implant preserves bone |
| Success rate | 90-95% over 10 years | 95-98% over 10 years |
Extraction should be the last resort, not the first option. A natural tooth with a successful root canal can last decades — often a lifetime.
When extraction is the better option:
– The tooth is too badly broken to restore
– There is severe bone loss around the tooth from gum disease
– A vertical root fracture (the root itself is cracked)
– Previous root canal treatment has failed and retreatment is not feasible
Frequently Asked Questions
How long does a root canal last?
A root canal treated tooth, properly restored with a crown and maintained with good oral hygiene, can last a lifetime. Studies show a success rate of 90 to 95 percent over 10 years. The most common reason for failure is reinfection due to a poorly sealed crown or new decay.
Can I eat after a root canal?
Wait until the anaesthesia wears off (2 to 4 hours) to avoid biting your cheek or tongue. Then eat soft foods on the opposite side for a day or two. Avoid hard or crunchy foods on the treated tooth until the permanent crown is placed.
Why do I need a crown after a root canal?
A root canal removes the blood supply to the tooth, making it more brittle over time. A crown protects the tooth from fracturing, which is the most common way root-canal-treated teeth are eventually lost. Back teeth (which take heavy chewing forces) almost always need a crown. Front teeth may sometimes be fine with just a filling.
Is it better to just pull the tooth?
In most cases, no. Keeping your natural tooth is almost always preferable. Extraction leads to bone loss, shifting of adjacent teeth, and the need for a replacement (implant, bridge, or denture) — all of which cost more than a root canal and crown.
In pain? We can help. If you suspect you need a root canal, do not wait — the sooner we treat the infection, the simpler the procedure.
Call us: (08) 8995 9530
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