“Root canal” might be the most feared phrase in dentistry, and the reputation is decades out of date. Here is the part the jokes leave out: the pain people associate with root canals is the toothache that comes before the treatment. The root canal is what makes it stop.
What a root canal actually is
Inside every tooth is a small space of nerves and blood vessels called the pulp. When deep decay or a crack lets bacteria reach it, the pulp gets infected and inflamed, and because it is sealed inside hard tooth, the pressure has nowhere to go. That is the famous throbbing toothache that keeps people up at night.
A root canal removes the infected pulp, cleans and disinfects the space, and seals it so bacteria cannot get back in. The tooth stays in your mouth and keeps working. A tooth does not need its pulp to function once it is fully grown — it just needed it to develop.
Why the fear is outdated
Modern root canals are done under local anaesthetic, the same freezing used for a filling. Most patients describe the appointment as long and boring rather than painful — you are lying back with your mouth open for 60 to 90 minutes while the dentist does careful, precise work.
Studies and patient surveys keep finding the same thing: people who have actually had a root canal rate it about as uncomfortable as a large filling. The dread is almost entirely secondhand, inherited from an era before modern anaesthetics and rotary instruments.
If needles or dental settings themselves are the hard part for you, that is a real and common thing — see our guide to easier visits with dental anxiety. Everything there applies doubly here.
What happens, step by step
- Freezing. The area is numbed thoroughly. You should feel pressure, not pain — and if you feel anything more, say so and more anaesthetic is added.
- Cleaning. The dentist makes a small opening in the top of the tooth and removes the infected pulp with fine instruments, then disinfects the canals.
- Sealing. The cleaned canals are filled with a rubbery material called gutta-percha and the opening is closed.
- Restoring. Most back teeth then need a crown, because a tooth without pulp becomes more brittle over time. Front teeth can sometimes get by with a filling.
Simple cases finish in one visit; a molar with curved canals or a stubborn infection may take two.
What it costs in Toronto
Prices follow the Ontario fee guide and depend mostly on which tooth it is — more roots means more work:
- Front tooth: roughly $800 to $1,100
- Premolar: roughly $900 to $1,300
- Molar: roughly $1,100 to $1,700
The crown, if needed, is a separate cost, typically $1,200 to $2,000. Most private insurance plans treat root canals as basic care (often covered around 80 percent) and crowns as major care (often around 50 percent) — our costs and coverage guide breaks down how to read your own plan.
Always ask for the full quote up front, root canal and crown together. A surprise second bill is the most common complaint, and it is completely avoidable.
Root canal vs. pulling the tooth
An extraction is cheaper on the day, and sometimes it is genuinely the right call — a tooth that is cracked below the gumline or too broken down to rebuild cannot be saved. But for a saveable tooth, pulling it usually costs more later. A missing tooth lets neighbours drift, changes your bite, and replacing it with an implant or bridge runs several times the price of the root canal that would have kept it.
The rule of thumb dentists use on their own teeth: keep the natural tooth whenever it can be reasonably saved. Nothing artificial works quite as well.
Signs you might need one
- A toothache that throbs, lingers, or wakes you at night
- Pain that persists long after hot or cold — not just a quick zing
- A tooth that has darkened compared to its neighbours
- A pimple-like bump on the gum near a sore tooth
- Deep pain when you bite down
One important catch: an infected tooth can also go quiet when the nerve dies. The pain stops, but the infection is still there and spreading. A toothache that “fixed itself” deserves an X-ray, not a celebration.
Don’t wait it out
Pulp infections do not heal on their own. Caught early, a root canal is routine; left long enough, it can become an abscess, a dental emergency, or a tooth that truly cannot be saved.
Every clinic in the Orbit network is verified, your cost is shown up front, and booking takes a couple of minutes — so a suspicious toothache gets looked at this week, not next year. See how it works.