Root canal treatment should be resealed when the medicine falls off, root canal disinfection should be carried out, after which the root canal should be tightly closed by using root canal filling materials as follows. The purpose of sealing root canal treatment is to eliminate microorganisms and toxins remaining in the deep dentin tubules and lateral root canals, etc. Usually, the cavity needs to be temporarily closed after sealing, and if the temporary sealing material and medication fall off, saliva, microorganisms, food residues, etc. will enter the pulpal cavity, and the root canals need to be re-sterilized. A complete root canal treatment also includes subsequent root canal filling, using root filling materials to tightly seal the root canal system, after which, depending on the size of the defect, a filling restoration, an inlay restoration, or a full crown restoration can be chosen. It is recommended to visit the hospital in time to receive early formal treatment.