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What Happens During a Root Canal, Step by Step

Why this procedure has a worse reputation than the experience

Root canal treatment is often assumed to be painful, but the discomfort people associate with it usually comes from the infection itself, before treatment — not from the procedure, which is done under local anaesthesia and is generally comparable to having a filling placed.

Step 1 — Diagnosis and X-ray

An X-ray confirms the extent of the infection and how many canals the tooth's root has, which varies by tooth and shapes exactly how the treatment will proceed.

Step 2 — Local anaesthesia

The tooth and surrounding area are numbed before anything else happens, in the same way as for a filling.

Step 3 — Removing the infected tissue

A small opening is made in the tooth to access the infected pulp inside, which is then carefully removed from each canal.

Step 4 — Cleaning and disinfecting the canal

The empty canal space is cleaned, shaped, and disinfected to make sure no infected tissue or bacteria remain before it's sealed.

Step 5 — Sealing the tooth

The cleaned canal is filled with a biocompatible material and sealed, and the access opening is closed with a filling.

Step 6 — A protective crown, usually

Because a tooth that's had root canal treatment can become more brittle over time, a crown is typically recommended afterward to protect it from cracking under normal biting force.

What recovery actually feels like

Mild soreness for a day or two afterward is normal and manageable with standard pain relief — most patients are surprised by how unremarkable the recovery is compared to what they expected going in.

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Medically reviewed by: Dt. Nizam Abdullayev, Dentist. Last updated: 2026. This article is for general information and does not replace a personal consultation.