A root canal is a treatment used to repair and save a tooth that is badly decayed or infected. The procedure involves removing the infected or damaged tissue inside the tooth (the pulp), cleaning the inside of the tooth, and then filling and sealing the tooth to prevent further infection. Root canal treatment is typically performed by a dentist or endodontist. Although it can be a little uncomfortable, most people do not experience significant pain during or after the procedure. The success rate for root canal treatment is quite high, and the treated tooth can last for many years.