Root canal treatment for periapical granuloma caused by apical inflammation is generally root canal treatment, as follows. 1. The operation procedure of root canal treatment is to open the pulp cavity under local anesthesia, remove the infected and necrotic pulp tissues, prepare the root canal into a shape that is conducive to rinsing, sealing and filling, and then disinfect the root canal, and finally use the root canal filling material to seal the root canal tightly. 2. After root canal treatment, the irritation of the root canal to the periapical tissues is eliminated and isolated, and some of the filling materials have the effect of promoting healing, the inflammation of the periapical area will gradually disappear, and the periapical granuloma can generally heal in about 6~12 months. It is recommended to go to the hospital in time to receive regular treatment.