If the hospital that the patient chooses for the treatment of tooth decay is a small hospital, the patient can directly choose to hang up the stomatology department. In addition, if the hospital that the patient chooses for tooth decay treatment is a large general hospital, there are many branches of dentistry, which need to be chosen according to the patient’s needs. 1. If the patient is a child, he/she can choose to hang the children’s stomatology department; if the patient’s decayed tooth requires filling or root canal treatment, he/she can choose to hang the endodontics department; if the patient’s decayed tooth is to be restored by inlay, he/she can choose to hang the restorative stomatology department or the endodontics department. 2. Simply speaking, patients need to choose the department to treat tooth decay according to their own needs for tooth decay treatment program. However, if it is the patient’s first time to go to the hospital for treatment of tooth decay, he/she can consult with the staff at the hospital’s guidance office before making a decision, or he/she can directly choose to go to the Department of Stomatology. Only by practicing good brushing habits and maintaining good oral hygiene can dental diseases be minimized.