Dentistry and endodontics: it mainly treats dental hard tissue diseases, namely dental caries, pulpitis, periapical periodontitis and non-caries diseases. Periodontal mucosa department: it mainly treats periodontal diseases and oral mucosal diseases. People know that tooth washing (that is, tooth washing) also belongs to this category. Oral and Maxillofacial Surgery: The main treatment scope includes tooth extraction, oral and maxillofacial inflammation, trauma, salivary gland diseases, maxillofacial tumors, temporomandibular joint diseases, and maxillofacial developmental deformities in patients over 0/4 years old. At present, people are very concerned about dental implants, some of which belong to undergraduate courses and some belong to prosthodontics. In order to be responsible for the safety of patients with hypertensive heart disease, some stomatological hospitals have also set up ECG monitoring tooth extraction clinics. Prosthodontics: that is, dental prosthetics. It includes removable denture and fixed denture. Orthodontics: mainly for malocclusion patients. Oral pediatrics: mainly for 14 years old children to treat various oral diseases. Oral preventive department: mainly including oral hygiene publicity and education and preventive treatment. Publicity and education include imparting oral hygiene knowledge to patients and helping them master the ability of oral self-care. The purpose of treatment is to prevent dental caries in children and periodontal disease in adults.