Endodontists are dentists who have received an additional 2-3 years of advanced training in root canal therapy procedures after graduating from dental school. They perform routine as well as complex root canal procedures, including endodontic surgery. Endodontists are also experienced with diagnosing oral and facial pain. All dentists, including your general dentist, receive training in root canal therapy in dental school. General dentists often refer patients needing root canal therapy to endodontists.