Inflammation of the tooth nerve can choose to kill the nerve treatment, open the tooth and seal in the inactivator after temporary sealing, usually about 10 days, and then remove all the contents of the nerve and other infected materials, disinfect the root canal, and then fill the root canal with hot dental adhesive, so that the tooth becomes a sterile environment, the surface is then filled with the crown of the tooth, and the tooth will not be inflamed again. Usually after the root canal treatment, the patient can have a high inlay or a crown to avoid fracture of the tooth.