Root canal treatment is the intervention performed when there is irreversible inflammation in the pulp tissue (nerves) of the tooth. Root canal treatment, contrary to what is known, is a painless treatment. Treatment is generally the removal of pulp tissue containing the vein and nerve package of the tooth. The pulp is removed with tools called a file and filled with tissue-friendly substances called gutta-percha. This process can usually be done in 2 sessions, or it can take more sessions depending on the tooth condition.