Suggest coming to our hospital for surgery. Root canal therapy is actually the most commonly used and effective treatment for pulp diseases and periapical diseases. The principle of root canal therapy is to remove most infections in root canals by mechanical and chemical methods, and to prevent periapical lesions or promote the healing of periapical lesions by filling root canals and sealing crowns. It is necessary to remove pulp tissue and root canal system infection in order to preserve the whole tooth or root, but it is required that the tooth has sufficient periodontal tissue and bone support.