After placing calcium hydroxide into the root canal and using glass ionomer to temporarily seal the cavity for a maximum of 1~2 weeks, the temporary sealing material is removed and root canal filling material is used to tightly seal the root canal system, and then restoration of the tooth defect is carried out as follows. After root canal preparation, the microorganisms and toxins remaining in the microstructure of dentin tubules and lateral root canals need to be removed through root canal disinfection. Calcium hydroxide is the commonly used root canal disinfectant, which is inserted into the root canal, and then glass ions need to be used to temporarily seal the cavity to prevent saliva, bacteria, food residues, etc. from entering the pulpal cavity and contaminating the root canal again. Glass ions have poor strength and cannot be used permanently, but can only play a temporary role in sealing, and should be removed 1~2 weeks after the temporary sealing to carry out the subsequent root canal filling and restoration of the tooth. It is recommended to visit a regular medical institution to receive professional treatment.