If tooth decay needs filling treatment or tooth decay causes pulp inflammation, apical inflammation or acute pain, you can register with the Department of Endodontics, and if tooth decay causes very serious tooth loss and needs extraction treatment, you can register with the Department of Oral and Maxillofacial Surgery for tooth extraction treatment. In order to adapt to the patients and facilitate their consultation, some dental hospitals have set up a comprehensive dental department, so tooth decay can also be listed in the comprehensive dental department, where the filling treatment of endodontics and the tooth extraction treatment of oral and maxillofacial surgery can be completed at the same time, including the tooth restoration treatment after tooth extraction. If tooth decay needs to be treated in a general hospital, it is enough to register with the Department of Stomatology. In a specialized dental hospital for children, there is a special Department of Pediatric Stomatology, where the comprehensive treatment of tooth extraction and tooth filling can be completed.