The process of filling cavities mainly includes three steps: cavity preparation, cavity disinfection and cavity filling. Dental filling is a common treatment for dental defects caused by caries, trauma and other diseases, the main process is as follows: 1. Cavity preparation: Most of the cavities need to be prepared under local anesthesia, usually using a tungsten steel ball drill, teardrop drill, etc. The main purpose is to remove the decayed material in the lesion area and reduce the chance of localized further damage. 2. Sterilization of the socket: After the socket is prepared, it needs to be sterilized with alcohol cotton balls. 3. Cavity filling: After the disinfection treatment, composite resin and other materials are filled and the shape is trimmed. After the filling is finished, polishing cream can also be used for polishing treatment. Specific treatment is recommended to go to the authoritative medical institutions.