What Is a Root Canal and Does It Hurt?
The pain myth, the actual procedure step by step, and why modern root canals are no worse than fillings
“Root canal” is one of the most-feared phrases in dentistry — and one of the most misunderstood. The myth: root canals are extremely painful. The reality: the infection causing the need for root canal hurts; the procedure itself does not. Modern root canal treatment is no more uncomfortable than getting a filling. The procedure has improved dramatically over the past 20-30 years thanks to better anesthesia, refined technique, and digital imaging. As a dentist serving St. Charles, IL, Dr. Aqil Valika at Bliss Dental Center performs root canals daily. Here is what actually happens — and why most patients leave saying “that was easier than I expected.”
What a Root Canal Actually Is
Inside every tooth is a chamber containing the pulp — a cluster of nerves, blood vessels, and connective tissue that nourished the tooth as it developed. The pulp extends from the tooth crown down through canals in each root.
When the pulp becomes infected (usually from deep decay, a crack reaching the pulp, or repeated dental procedures on the same tooth) or irreversibly inflamed, it cannot heal on its own. Two options: extract the tooth, or perform a root canal to remove the infected pulp, clean and disinfect the canal system, and seal it permanently.
The root canal procedure: a small access opening is drilled through the top of the tooth, the infected pulp is removed, the canals are shaped and disinfected, and the canals are filled with a rubber-like material called gutta-percha. The access opening is sealed with a temporary or permanent filling, and a crown is typically placed on the tooth afterward to protect it. See our root canal page.
The Pain Myth — Where It Comes From and Why It Is Wrong
The “root canals are painful” reputation comes from two sources, both outdated:
1. Untreated infection pain. Patients usually arrive for root canal treatment because they are in pain — the infection is causing throbbing, lingering sensitivity, or sharp biting pain. They associate the pain with the procedure rather than the underlying problem. The procedure resolves the pain; it does not cause it.
2. Outdated procedural memories. Root canal techniques in the 1960s-1980s were genuinely uncomfortable — anesthesia was less effective, instruments were cruder, the procedures took longer. Modern root canals are entirely different. Better anesthetics, rotary instrumentation, digital imaging, and precise canal cleaning have transformed the procedure.
The clinical insight worth knowing: when patients with active infection receive proper anesthesia for the root canal procedure, most report the procedure feels like getting a routine filling — pressure but no sharp pain. The infection-driven pain stops within 24-48 hours of the procedure as the inflammation resolves.
Step by Step — What Happens at the Visit
- Diagnosis and treatment planning (15-20 minutes). X-ray, sometimes CBCT 3D scan, pulp testing to confirm root canal is the right treatment.
- Local anesthesia (5-10 minutes). The tooth and surrounding gum are numbed thoroughly. We confirm full numbness before proceeding — if you feel anything sharp, we administer additional anesthetic.
- Rubber dam placement. A small sheet of latex or non-latex material isolates the tooth being worked on. Keeps the area clean and prevents anything from being swallowed.
- Access opening (5-10 minutes). Small opening drilled through the chewing surface (or back side of front teeth) to reach the pulp chamber.
- Pulp removal and canal cleaning (30-60 minutes). The infected pulp is removed using fine instruments. Canals are gently shaped and disinfected with antiseptic irrigation.
- Canal sealing (15-20 minutes). Canals are filled with gutta-percha and sealing cement. The access opening is closed with a temporary or permanent filling.
- Final restoration (often a separate visit). A crown is placed on the tooth to protect it long-term — this is essential. See our dental crowns page.
Total time: 60-90 minutes for a typical molar root canal. Some single-canal teeth (front teeth, premolars) finish in 45-60 minutes.
What Modern Root Canals Feel Like
Honest patient experience:
During the procedure: pressure on the tooth from the rubber dam clamp, vibration when the access opening is drilled, brief moments of sensation when canals are being measured, and intermittent “hum” sounds from rotary instruments. No sharp pain if anesthesia is adequate.
After the procedure: tooth tenderness for 1-3 days, manageable with ibuprofen. The tooth may feel slightly “different” or sensitive to biting for up to a week as the surrounding tissue heals. The infection-related pain resolves within 24-48 hours.
Long-term: the treated tooth functions normally. With a crown placed afterward, the tooth typically lasts 10-20+ years. Some root canals last a lifetime. Failure rate at 10 years is around 5-10%; most failures are managed with retreatment or extraction + implant.
Sedation Options for Anxious Patients
For patients with significant dental anxiety, sedation can be added on top of local anesthesia:
- Nitrous oxide (“laughing gas”) — added to local anesthesia, you stay relaxed and comfortable, can drive yourself home
- Oral sedation — prescribed pill taken before the visit; you are conscious but very relaxed, need a driver
- IV sedation — for severely anxious patients or particularly long procedures; twilight sleep with limited memory
See our sedation dentistry page and dental anxiety page. With 203 five-star Google reviews, Bliss Dental sees anxious patients regularly.
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