While all endodontists are dentists, less than three percent of dentists are endodontists. Just like a doctor in any other field, endodontists are specialists because they’ve completed an additional two or more years of training beyond dental school. Their additional training focuses on diagnosing tooth pain and performing root canal treatment and other procedures relating to the interior of the tooth. In many cases, a diseased tooth can be saved with endodontic treatment. For this reason, endodontists proudly refer to themselves as Specialists in Saving Teeth.