Root Canal Procedure: Steps and What to Expect

April 16, 2026

Root canals have a reputation that does not reflect reality. Most people who have had one will tell you the same thing: the procedure itself was far less dramatic than the toothache that made it necessary. What you feel before a root canal, the throbbing, the pressure, the sensitivity, is almost always worse than what happens during the treatment.

If you have been told you need a root canal or are experiencing symptoms that suggest you might, understanding the actual process takes a lot of the uncertainty out of it. At Dentistry at Renton, the goal is to make every procedure as comfortable and straightforward as possible. Here is a clear, honest walkthrough of what happens at each step. And if the success numbers help: clinical studies report success rates of 85 to 97% over four to ten years, defined as no pain, infection, or returning symptoms.

What Is a Root Canal and Why Is It Needed?

A root canal treats the inner part of the tooth called the pulp. The pulp sits inside the hard outer layers of the tooth and contains the nerves and blood vessels that helped the tooth develop. When bacteria reach the pulp, through a crack, deep cavity, or trauma, the result is infection and often significant pain. Root canal treatment removes the infected pulp, cleans and seals the inside of the tooth, and restores it so it can continue functioning normally.

The alternative to a root canal is extraction. Saving the natural tooth is almost always the better outcome, and a root canal is the procedure that makes that possible.

Signs You Might Need a Root Canal

• Persistent toothache: Pain that does not go away, particularly when chewing or applying pressure.
• Lingering sensitivity: Sensitivity to heat or cold that continues well after the temperature source is removed.
• Swollen or tender gums: Especially around a specific tooth, sometimes with a small bump visible on the gum.
• Darkening of the tooth: A tooth that is noticeably darker than surrounding teeth may indicate pulp damage.
• No symptoms at all: In some cases, infection is detected on an X-ray before any noticeable symptoms develop.

Root Canal Procedure: Step by Step

The procedure typically takes one to two appointments depending on the complexity of the case. Here is what happens at each stage:

1. Examination and X-rays. Before anything else, Dr. Navdeep Virk, D.M.D., takes digital X-rays to assess the extent of the infection and examine the shape of the root canals. This imaging guides the entire treatment.
2. Local anesthesia. The area around the affected tooth is thoroughly numbed with a local anesthetic. You should feel little to no sensation during the procedure. If you are feeling anything other than pressure, let Dr. Virk know immediately so the anesthetic can be adjusted.
3. Dental dam placement. A small rubber sheet called a dental dam is placed around the tooth to isolate it and keep the area dry and clean throughout the procedure.
4. Access opening. A small opening is made in the top of the tooth to reach the pulp chamber and the root canals below.
5. Pulp removal and canal cleaning. Specialized instruments are used to carefully remove the infected pulp tissue and shape the canals. The canals are cleaned, disinfected, and rinsed to remove all bacteria and debris.
6. Filling the canals. The cleaned canals are filled with a biocompatible material called gutta-percha, which seals them to prevent future infection. A temporary or permanent filling closes the access opening.
7. Crown placement. In most cases, a crown is placed over the treated tooth at a follow-up appointment to restore its full strength and function. A root-canal-treated tooth without a crown is more vulnerable to fracture.

What does it feel like? Most patients report feeling pressure during the procedure but not sharp pain. The area is numb throughout. Some soreness in the surrounding gum tissue for a day or two after is normal and manageable with over-the-counter pain relief.

What to Expect After a Root Canal

Some tenderness in the first day or two is completely normal. Most people take over-the-counter pain relievers and eat soft foods for a short period. Severe pain or swelling is not normal and should prompt a call to the practice. Most patients return to normal activities the same day or the day after treatment.

Long-Term Outlook

Research from the Regenstrief Institute found that teeth treated with root canals survive an average of 11 years in general dental practice, with outcomes shaped by the restoration placed and ongoing care. Proper crowning and good oral hygiene are the two most important things you can do to protect the treated tooth long term.

Root Canal vs. Tooth Extraction: A Quick Comparison

If you are experiencing severe tooth pain, swelling, or signs of infection that suggest you cannot wait for a scheduled appointment, Dentistry at Renton offers emergency dental services. Getting prompt treatment can prevent the infection from spreading and make the eventual root canal simpler.

Tooth Pain in Renton? We Can Help.

If you are experiencing tooth pain or have been told you may need a root canal, Dr. Navdeep Virk, D.M.D., and the team at Dentistry at Renton are here to help you understand your options and get comfortable as quickly as possible. You can visit the office at 19221 108th Ave SE #4 in Renton or call (253) 852-4746 to speak with the team directly.

Frequently Asked Questions

Does a root canal hurt?

Not during the procedure. Local anesthesia keeps the area numb throughout. Most patients feel pressure but not sharp pain. The discomfort people associate with root canals is usually the infected tooth pain beforehand, which goes away once Dr. Virk removes the pulp.

How long does a root canal take?

Most root canals take one to two appointments of about 60 to 90 minutes each. Complex cases may require additional time. Dr. Virk will give you an estimate at your appointment.

Can I eat after a root canal?

Wait until the anesthesia wears off to avoid accidentally biting your cheek. Stick to soft foods for a day or two and avoid chewing on the treated side until a crown is placed.

How do I know if my root canal has failed?

Watch for returning pain, swelling, or a new abscess near the treated tooth. These can often be addressed with retreatment. Contact Dr. Virk promptly rather than waiting.

Is a crown always necessary after a root canal?

In most cases, yes. A root-canal-treated tooth loses moisture over time and becomes more brittle. Without a crown, it is at higher risk of fracture under chewing pressure. Back teeth that take the most force almost always need a crown. Front teeth may sometimes be restored with a filling, but Dr. Virk will advise based on the specific tooth.