Root canal therapy is a treatment method used to repair and save infected or decayed teeth. During root canal treatment, pulp and dental nerve, the soft tissue found in the natural cavity called canal in the hard tissue of the tooth, are removed, the inside of the tooth is cleaned, and then the opened space is filled.

If dental caries is not treated in time, the caries progresses deeper and causes inflammation of the nerves in the tooth. Inflammation of the dental nerves causes a person to experience severe toothache.

The tooth nerve removed from the tooth is not vital for dental health and function, but it prevents the person from suffering severe pain. It is a sensory nerve used only to sense heat and cold. If not treated, an abscess may occur with infection of the tissue surrounding the tooth.