Root canal myths vs facts: what you really need to know

Root canals are routine dental procedures that relieve pain, not cause it. We bust the most common myths about pain, cost, and necessity — so you can decide from facts, not fear.

Medically reviewed by Dr. Jose, DDS — June 15, 2026

What a root canal actually is

A root canal is a procedure that removes infected or inflamed tissue from inside your tooth—the part called the pulp. The pulp contains nerves and blood vessels. When it becomes infected (often from deep decay, a crack, or repeated dental work), the infection causes pain and can spread. A root canal cleans out the infected pulp, disinfects the space, and seals it to prevent future infection.

Myth: Root canals are extremely painful

This is one of the most common misconceptions. In reality, a root canal relieves pain, it doesn’t cause it. Before the procedure, your dentist numbs your tooth thoroughly, just as with a filling. Modern techniques and equipment make the experience manageable. Many patients report that root canal treatment is no more uncomfortable than having a cavity filled. The pain you feel before treatment—from the infected tooth—is often much worse than the procedure itself.

Myth: Root canals always fail and need to be redone

Root canal treatment has a high success rate. Like any procedure, success depends on factors such as how complex the tooth’s anatomy is, how quickly treatment began after infection, and how well you follow post-treatment care. If a tooth doesn’t heal as expected, your dentist can discuss options with you, which may include retreatment or other solutions.

Myth: It’s cheaper to just extract the tooth

Extraction may seem like a budget choice upfront, but replacing a missing tooth (with an implant, bridge, or partial denture) often costs more over time than saving the original tooth with a root canal. Additionally, extracting a tooth can lead to bone loss and shifts in your bite. Keeping your natural tooth is almost always preferable if it can be saved.

What actually happens during treatment

Your dentist or endodontist will:

1. Numb the tooth with a local anesthetic, similar to numbing before a filling.
2. Isolate the tooth using a rubber dam—a thin sheet that keeps the area dry and prevents you from swallowing debris.
3. Create an access opening to reach the pulp chamber.
4. Remove the infected pulp using specialized instruments.
5. Clean and shape the inside of the tooth.
6. Seal the space with a biocompatible material to prevent reinfection.
7. Close the access opening with a temporary or final restoration.

The entire procedure usually takes one to two hours, depending on the tooth’s complexity. You’ll remain awake but relaxed throughout.

Recovery and aftercare

Most people experience minimal discomfort after a root canal. You may notice mild soreness or sensitivity for a few days—this is normal. Avoid chewing on the treated tooth until it receives a permanent crown or restoration. Your dentist will give you specific aftercare instructions and schedule a follow-up appointment to monitor healing.

If you experience severe or worsening pain, swelling, or signs of infection after treatment, contact your dentist promptly.

How MediMouth helps

If your dentist has recommended root canal treatment or you’re unsure whether you need one, MediMouth can help you find a trusted dentist or endodontist in Arizona. You can ask your provider to explain your x-rays, discuss what’s causing your symptoms, and explore all your options before deciding. Don’t hesitate to get a second opinion if you have concerns—your dental health is worth the conversation.

This guide is educational information from MediMouth. It is not a diagnosis or a treatment plan, and it isn't a substitute for seeing a licensed dentist.