Surgery for removal of dental apical granulomas is usually an outpatient procedure, performed under local anesthesia, and is generally harmless with minimal risk. 1. With the development of technology and materials, the success rate of root canal treatment and retreatment has been greatly improved, but there are still some affected teeth with incurable periapical lesions, which need to be supplemented with surgical treatment. 2. Granulomatous resection of apical inflammation of the tooth mainly includes removal of the root apex, removal of necrotic and infected granulomatous tissues in the operation area, and tight closure of the root canal system, etc. It is usually an outpatient surgery with local anesthesia. It is usually an outpatient surgery, performed under local anesthesia, and is generally harmless with minimal risk. Post-operative swelling, pain and bleeding may occur, but are generally acceptable. Consultation with a medical professional is specifically recommended.