Root canal treatment is a dental technique that repairs and saves a badly damaged or infected tooth rather than extracting it. It entails extracting the infected pulp (the soft tissue inside the tooth that contains nerves and blood vessels) and washing and sanitizing the inside of the tooth. The tooth is subsequently filled and sealed to avoid future infection.
Root canal treatment is a popular operation that is usually successful in saving teeth. It usually costs less than extracting a tooth and replacing it with a bridge or implant.