Tooth piercing and medication release, i.e. the temporary sealing step of the cavity in root canal treatment, can last for 1~2 weeks, after which the next step of root canal filling and crown restoration treatment is required as follows. After root canal preparation and root canal flushing, root canal disinfection is required to control microorganisms and toxins and prevent reinfection of the root canal. Root canal sealing is the most commonly used disinfection method, and the drugs include calcium hydroxide and chlorhexidine. After placing the sterilizing drug into the root canal, the cavity needs to be temporarily sealed to prevent saliva, microorganisms, and food debris from entering the root canal. Commonly used temporary sealing materials include various types of cementum, such as zinc oxide eugenol, glass ionomer, zinc phosphate, zinc polycarboxylate, etc. Temporary sealing materials have limited strength and cannot be used permanently. Temporary sealing of cavities usually lasts for 1~2 weeks, after which root canal filling and crown restoration should be performed to complete the treatment.