Root Canal

Few dental phrases cause more worry than “root canal.” But here’s the truth: root canals are one of the most common and most successful procedures in dentistry. Modern techniques succeed more than 90% of the time.

Most patients feel relief when it’s over — not pain. The infection is gone, the toothache that brought them in has eased, and the tooth is saved. This guide walks you through the procedure, what recovery feels like, and when something deserves a call to your dentist.

What Is a Root Canal?

Inside every tooth is soft tissue called pulp. The pulp holds the nerves and blood vessels that helped the tooth grow.

When bacteria reach the pulp, it becomes infected and inflamed. That’s where the pain comes from. A root canal removes the infected pulp, cleans and disinfects the space inside the tooth, and seals it. The tooth stays in your mouth — alive in function, free of infection.

Common reasons the pulp gets infected include:

Deep decay that reaches the center of the tooth
A cracked or fractured tooth
An injury to the tooth, even without a visible crack
Repeated dental work on the same tooth

How Do You Know If You Need One?

Tooth pain can be tricky. The mouth has a dense network of nerves, so pain from one tooth can seem to come from another tooth — or even your ear, neck, or head.

Watch for these warning signs:

A toothache that lingers or throbs
Sharp pain when biting or chewing
Sensitivity to hot or cold that doesn’t fade quickly
Swollen or tender gums near one tooth
A pimple-like bump on the gums
A tooth that darkens in color

If you have any of these symptoms, see your dentist. If the pulp is involved, you may be referred to an endodontist — a dentist who specializes in root canal treatment.

What Happens During the Procedure?

A root canal is more routine than most people expect. Here’s the typical process:

Your mouth is numbed with local anesthesia, just like for a filling.
The dentist makes a small opening in the top of the tooth.
The infected pulp is removed from the canals inside the roots.
The canals are cleaned, shaped, and disinfected.
The space is filled and sealed to keep bacteria out.
A temporary filling protects the tooth until your permanent crown is placed.

Most root canals take one or two visits. With today’s anesthesia and techniques, the procedure itself feels similar to getting a large filling.

What Is Recovery Like?

Recovery is usually smooth. Some mild soreness for a few days is normal, especially when chewing. Over-the-counter pain relievers typically handle it.

A few simple steps help your tooth heal:

Avoid chewing on the treated tooth until the permanent crown is placed.
Brush and floss normally, keeping the area clean.
Take any prescribed medication exactly as directed.
Keep your follow-up appointment for the permanent crown.

Is a Fever After a Root Canal Normal?

A mild, low-grade fever in the first day or two is sometimes part of normal healing. Here’s why: when your body repairs itself, your immune system releases chemicals that can slightly raise your temperature. It’s your body doing its job.

This kind of fever is mild, short-lived, and improves on its own within a day or two. You should still feel a little better each day.

When Should You Call the Dentist?

Some symptoms mean the tooth needs a quick check. Call your dentist if:

A fever lasts more than two days or keeps climbing
The treated tooth still hurts, throbs, or feels worse over time
The gum or your face swells near the tooth
The area feels unusually warm to the touch
You notice a bad taste or discharge near the tooth

These can be signs of a lingering infection. Caught early, it’s usually simple to fix. Waiting lets a small problem grow into a bigger one.

Why Do Infections Sometimes Come Back?

Root canals succeed the vast majority of the time. When an infection does return, it’s usually for one of these reasons:

A tiny amount of infected pulp was left behind in a hard-to-reach canal
The permanent crown was delayed, letting bacteria sneak back in
A new crack opened a path for bacteria
Plaque built up around the tooth during recovery

What If the First Root Canal Fails?

Even then, the tooth can often still be saved. There are two main options.

Retreatment

The dentist reopens the tooth and removes the old filling material. The canals are cleaned and disinfected again, then refilled and resealed. Retreatment works well when the first procedure failed because of incomplete cleaning or a leaky seal.

Endodontic Surgery

When retreatment isn’t enough, a minor surgery called an apicoectomy may help. The endodontist removes the very tip of the tooth’s root, where stubborn infection can hide, and seals the end. It sounds intense, but it’s a routine outpatient procedure.

Protecting Your Tooth for the Long Run

A tooth with a completed root canal and crown can last a lifetime. Give it the same care as the rest of your smile:

Brush twice a day and floss daily.
Get the permanent crown placed on schedule — don’t put it off.
Keep up with regular checkups and cleanings.
Wear a mouthguard if you grind your teeth or play contact sports.

If you’re dealing with tooth pain or have been told you need a root canal, don’t wait. At Hawaii Family Dental, we’ll walk you through exactly what to expect and make the process as comfortable as possible. Relief is closer than you think.

Frequently Asked Questions

Does a root canal hurt?

The procedure itself shouldn’t hurt — your mouth is fully numbed, and it feels much like getting a filling. Most of the pain people associate with root canals comes from the infection before treatment, not the treatment itself.

How long does recovery take?

Most people return to normal activities the next day. Mild soreness can last a few days and usually responds well to over-the-counter pain relievers.

Is a low fever after a root canal serious?

Usually not. A mild fever in the first day or two can be part of normal healing. Call your dentist if it lasts longer than two days, keeps rising, or comes with pain, swelling, or warmth around the tooth.

Do I really need a crown after a root canal?

In most cases, yes. A treated tooth becomes more brittle over time. The crown protects it from cracking and restores full chewing strength.

What happens if I skip the root canal?

The infection won’t go away on its own. It can spread to the jaw, other teeth, or beyond, and the tooth may eventually need to be pulled. A root canal saves the tooth; waiting risks losing it.