Root canal therapy, also known as endodontic therapy, is a dental procedure that is performed to save a damaged or infected tooth. The procedure involves removing the damaged or infected pulp, which is the soft tissue inside the tooth that contains nerves, blood vessels, and connective tissue. After the pulp is removed, the tooth is cleaned and disinfected, and then filled and sealed with a material called gutta-percha. A crown or other type of restoration is usually placed over the tooth to provide additional protection and support. Root canal therapy can be performed by a general dentist or by an endodontist, who is a specialist in treating problems with the dental pulp.