Root canal therapy is a very widely used clinical treatment in endodontics and is now the preferred treatment for endodontic and periapical diseases. The biggest category of its applicability is patients with endodontic disease and periapical disease, which is also commonly known as pulpitis and periapical inflammation patients. In addition to endodontics and periapical disease, there are some friends who are also suitable for root canal treatment, such as severe periodontal disease caused by combined periodontal and pulp lesions, due to trauma and other reasons resulting in pulp exposure or root resorption, because of the need for restoration or orthodontics, the tooth needs to be abraded part of the abraded, abraded may be injured when the pulp, this may also need to be in advance of the root canal treatment. Other teeth such as fracture or other non-caries diseases affecting the pulp may also require root canal treatment. There are also other clinical procedures, such as treating tumors and cysts that may injure the tooth, which may also require an advance root canal. In conclusion, whether it is suitable for root canal treatment, you must go to the hospital and ask the doctor to make a judgment and treatment plan, according to the condition of the tooth to carry out the correct treatment.