5 Root Canal Myths That Keep Patients in Pain

Root canal myths, especially the belief that the procedure causes pain rather than stops it, lead many Las Vegas patients to delay treatment until a simple infection turns into a swollen face, an abscess, or a lost tooth. Understanding what root canal therapy actually involves prevents these avoidable complications.

A patient walks in holding an ice pack to her jaw. She’s had a dull ache for three weeks. She admits she knew something was wrong but put off calling because her brother told her root canals are “the worst thing you can go through.” By the time she’s seen, the infection has spread and her face is visibly swollen. What could have been a single-visit root canal is now an emergency requiring antibiotics first, then treatment for the swollen face, then the root canal itself.

This scenario plays out often. Not because patients are careless, but because they’ve absorbed a handful of myths that make root canal therapy sound worse than the infection it treats. The gap between what people believe and what actually happens in the chair is where most of the damage occurs.

The Bottom Line

• Modern root canals use local anesthesia and are typically completed in one to two visits of 60–90 minutes each.
• Untreated tooth infections can spread to the jaw, face, or bloodstream within days to weeks.
• Patients who wait until swelling appears often need antibiotics before the tooth can even be treated.
• A root canal removes infected pulp tissue; it does not “kill” the tooth or make it more fragile than a crowned tooth already is.
• Extraction is not a pain-free shortcut — it usually costs more long-term once a bridge or implant is factored in.

Myth One: Root Canals Are More Painful Than the Infection

This is the myth that does the most damage. In our experience, patients rate the pain of an untreated infected tooth far higher than the treatment itself. The procedure removes the inflamed or infected nerve tissue causing the pain in the first place. Once that tissue is out, the pressure and throbbing usually stop.

What actually hurts is waiting. An infected pulp doesn’t heal on its own. It either needs treatment or the tooth needs to come out. Neither option is “no treatment.” Local anesthesia numbs the area fully before any instrument touches the tooth, the same way it would for a filling. Soreness for a day or two afterward is normal and manageable with over-the-counter medication, not the multi-day ordeal the myth suggests.

Myth Two: You Only Need Treatment If the Tooth Hurts

Some infections are quiet. A tooth can have a dying nerve with no pain at all until the infection reaches the bone, at which point patients notice swelling, a bad taste, or a small bump on the gum that looks like a pimple. That bump is a sinus tract draining infection, and it’s a sign the problem has been present for a while.

Waiting for pain as the trigger to seek care means waiting for the infection to reach a more advanced stage. A dentist can often spot early signs of pulp damage — a dark tooth, sensitivity to temperature that lingers longer than a few seconds, or a small area of bone loss on an X-ray — before pain ever starts.

Solutions at a Glance

• Don’t wait for severe pain — a persistent dull ache or lingering sensitivity is reason enough to get checked.
• Ask about single-visit options — many straightforward cases are completed in one appointment using rotary instruments and digital imaging.
• Get a same-day evaluation for swelling — facial or gum swelling needs same-day attention, not a scheduled checkup weeks out.
• Pair the root canal with a crown when recommended — a treated tooth without a crown is more prone to fracture under normal chewing force.
• Compare cost against extraction plus replacement — a bridge or implant to replace a pulled tooth typically costs more than saving the natural tooth.

Myth Three: A Treated Tooth Is Basically Dead and Will Eventually Fail

Root canal therapy removes the pulp, the soft tissue with nerves and blood vessels inside the tooth. What’s left is the hard structure — enamel and dentin — which continues to function normally for chewing and biting. The Mayo Clinic notes that root canal-treated teeth can last a lifetime with proper care and a protective restoration.

The failure rate people hear about usually traces back to one of two causes: the tooth wasn’t restored with a crown afterward and eventually cracked, or a new cavity formed at the gumline years later. Neither is a flaw in the root canal itself. This is why a same-day crown is often recommended right after treatment on back teeth, which absorb the most chewing pressure.

Myth Four: Pulling the Tooth Is Simpler and Cheaper

Extraction looks like the shorter path. It isn’t, in most cases. Once a tooth is gone, the surrounding teeth begin shifting toward the gap within months. That shift changes the bite and can lead to problems with the opposing tooth and neighboring teeth over the following one to two years. Replacing the missing tooth with an implant or a bridge to prevent that shift adds cost and additional appointments that a root canal and crown would have avoided in the first place.

There’s also the extraction site itself to consider. Roughly 2–5% of extractions, particularly lower molars, develop a painful condition called dry socket, according to figures cited by the dental literature on the condition. Saving the natural tooth avoids that risk entirely.

Myth Five: You Can Skip Follow-Up Care Once the Pain Stops

Pain relief is not the same as finished treatment. A tooth that’s had its pulp removed still needs a permanent restoration — usually a crown — within a reasonably short window after the procedure. A temporary filling left in place too long can crack or wear through, letting bacteria back into the tooth. What we see most often with patients who skip this step is a temporary filling failing months later, sometimes requiring the entire procedure to be redone.

Follow-up also matters for less common situations, like a crown that becomes displaced or a tooth that develops new sensitivity to biting pressure. The American Association of Endodontists recommends monitoring treated teeth with periodic checkups, since a small percentage of cases require retreatment if bacteria find a new pathway into the root canal system.

References

1. American Association of Endodontists. Root Canal Treatment: Patient Information. AAE. 2025.
2. Mayo Clinic. Root Canal: About This Procedure. Mayo Foundation for Medical Education and Research. 2024.
3. National Institute of Dental and Craniofacial Research. Tooth Decay and Dental Infections. National Institutes of Health. 2024.
4. American Dental Association. Endodontic (Root Canal) Treatment. ADA.org. 2025.
5. Wikipedia contributors. Dry Socket. Wikipedia, The Free Encyclopedia. 2025.

This article is for informational purposes only and does not constitute professional advice. Please consult a qualified dentist for personalised guidance.

Have Questions About a Tooth That’s Been Bothering You?

If something feels off with a tooth, it’s worth getting a straight answer instead of guessing based on what you’ve heard. Reach out with questions, or read more about what to expect during an emergency root canal so you know what’s ahead before you sit down in the chair.