All Conditions

Root canals get a bad rap.

Honestly, the toothache that sends you to the dentist is way worse. Let's walk through what a modern root canal is actually like.

Reviewed by Areeba Aslam, General Dentist at DentaSmart|Last reviewed: February 21, 2026

In one sentence: A root canal removes infected or damaged tissue (pulp) from inside the tooth, saves the outer structure, and eliminates the source of pain and infection.

Quick Answer

A root canal is just a deep cleaning inside your tooth. When the soft stuff inside (called pulp, which has nerves and blood vessels) gets infected, a dentist needs to get it out of there to save the tooth. They'll numb you up, take out the bad stuff, clean the area, and then seal it up. Most people say it feels about the same as getting a regular filling. Afterwards, you'll probably get a crown to keep the tooth strong.

Understanding Root canal

Your tooth isn't solid all the way through. There's a soft center called the pulp, which is where the nerves and blood vessels live. If that pulp gets infected—from a bad cavity, a crack in the tooth, or even an old injury—it's got to be dealt with. And a root canal is usually the best way to do that without pulling the whole tooth.

So, what happens during the procedure? It's pretty simple, really. First, your dentist will make sure you're completely numb. Then they make a tiny opening in the tooth, clean out all the infected pulp from inside the root canals, and fill it with a safe, rubber-like material. That's it. It might take one visit, or maybe two for a tricky tooth.

Let's clear this up: root canals don't cause pain, they get rid of it. The real pain is the infected tooth before the procedure. Once the source of the infection is gone, you feel better. Seriously, most people say it's no more uncomfortable than getting a standard filling.

Common Causes

Deep Cavities

A cavity that gets deep enough for bacteria to reach the nerve inside your tooth. Ouch.

Lots of Dental Work

Having multiple procedures on one tooth can, over time, just wear out the nerve.

Cracked Tooth

A crack or chip can be like an open door for bacteria to get right to the nerve.

An Old Injury

Sometimes a knock to the tooth can damage the pulp, but you won't feel the effects until much later.

Really Big Fillings

When a filling is very large, there isn't much natural tooth left to protect the sensitive pulp.

Signs and Symptoms

A really bad toothache that won't quit, especially when you bite downsevere
Your tooth hurts with hot or cold for a long time after you're done eating or drinkingmoderate
The tooth is starting to look darker than its neighborsmoderate
Your gums near the tooth are swollen and soresevere
You have a little pimple on your gums that keeps showing upmoderate

When to See a Dentist Urgently

While this information helps you understand your condition, it does not replace professional dental care. See a dentist as soon as possible if:

  • If you have a toothache that ibuprofen just isn't touching.
  • When you notice one of your teeth has gone dark.
  • If you have any swelling in your gums or face.
  • You spot a recurring bump on your gums. That's not normal.
  • If a tooth is super sensitive to temperature for more than just a few seconds.

What to Do Today

1

Manage pain with ibuprofen and avoid chewing on the affected tooth.

2

Keep the area clean by brushing gently and rinsing with salt water.

3

Call your dentist to discuss whether a root canal is the right treatment for your situation.

Questions to Ask Your Dentist

Is a root canal the best option, or should the tooth be extracted?

How many appointments will the procedure take?

Will I need a crown after the root canal?

What is the success rate for this particular tooth?

What happens if I delay or skip the root canal?

Key Takeaways

A root canal lets you keep your own tooth, and that's almost always the best option.

The whole point of a root canal is to make the pain go away, not cause more of it.

Don't skip the crown! After a root canal, your tooth needs that extra protection to last.

Frequently Asked Questions

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