The specific steps of root canal treatment can be divided into the following: First, under local anesthesia or nerve block anesthesia for nerve killing and sealing treatment, the specific operation is to drill a small hole in the center of the jaw surface of the tooth, put the pulp inactivator into the mouth, and seal the temporarily sealed medication. Secondly, in the case of complete pulp necrosis, the pulp is extracted, the infected material in the root canal is cleaned and removed, and then the medication is sealed. Thirdly, the cleaned root canal pulp cavity is filled, and the root canal is filled completely with hot dental cement, cutting off the part where the tooth is connected to the alveolar bone and the part where the tooth communicates with the mouth to achieve a sterile result. After the root canal is filled, the patient is advised to have a porcelain crown restoration to prevent the tooth from splitting.