Greetings, Dear Patient! In order to facilitate your consultation and registration, please judge the possible disease and the department you need to register according to the following department subspecialty combined with your symptom description, or your request. Of course, you can also directly appoint a doctor to register. Please follow the arrangement of the last department you visited to register for a follow-up consultation. (1) Endodontics mainly deals with dental diseases, such as caries (commonly known as tooth decay), pulp disease, periapical disease, and discolored teeth or teeth with defects that are dysplastic. Its characteristic is mainly toothache, and the treatment means lies in anti-inflammation, pain relief and cavity filling, as well as cosmetic bleaching of teeth, etc. (2) Periodontology mainly looks at diseases of periodontal and mucosal tissues, such as gingivitis, periodontitis, oral mucosal disease, etc. They are mainly characterized by redness and swelling of the flesh of the teeth, easy bleeding, loose teeth, and ulcers on the oral mucosa. The treatment means lies in cleaning the mouth, anti-inflammatory, various periodontal surgical treatment, and the usually used medication and injection of internal medicine therapy. (3) Oral and maxillofacial surgery mainly focuses on various diseases such as inflammation, trauma, deformity and tumor of the maxillofacial area, and is mainly characterized by surgical treatment of various diseases (including tooth extraction). The scope of oral and maxillofacial surgery includes extraction under supervision of complex teeth, surgical and non-surgical treatment of severe inflammation of the maxillofacial area, rescue and treatment of serious soft tissue and bone tissue injuries in the maxillofacial and cervical area, surgical treatment of various benign and malignant tumors of the head and neck area, repair and reconstruction of various types of tissue defective deformities, surgical plastic surgery of congenital or acquired deformities of the maxillofacial area (Smile Train designated hospital), diagnosis and treatment of temporomandibular joint diseases, arteriovenous deformities Endovascular treatment and surgical treatment of arteriovenous malformations, etc. (4) The Department of Prosthodontics mainly looks at missing teeth and repairs missing teeth, including full dentures and partial dentures, and among partial dentures, they can be divided into movable dentures and fixed dentures, and the production of dentures is designed according to the needs and possibilities. (5) Orthodontics mainly looks at patients whose teeth are not aligned properly and require correction. Its characteristics are to meet the cosmetic requirements of patients to a large extent, in addition to restoring the bite function, and the course of treatment is longer. (6) Oral preventive health care department is mainly for people with healthy oral cavity to conduct regular oral health examination and oral health education, and take various preventive measures (including applying various fluoride caries prevention methods, gutter closure, preventive scaling, etc.) to prevent the occurrence of diseases. Sometimes, we also do some simple treatment work of common oral diseases by the way for the convenience of patients. (7) Pediatric dentistry can be simply understood as the treatment of oral diseases exclusively for children and teenagers. But there are also its characteristics, such as children and adolescents are in the growth and development period, in addition to the physiological, anatomical and pathological characteristics, children also have important psychological characteristics, generally have a heavy fear of psychology. How to obtain the cooperation of children is the key to the quality of the consultation and treatment work, please parents according to the requirements of the doctor, close cooperation. (8) The Department of Oral Implantology is a clinical department that uses artificial implants for the clinical restoration of various types of missing teeth and maxillofacial defects in order to restore the maximum physiological function of the patient’s mouth and face. The treatment scope of the Department of Oral Implantology includes implant-supported overdenture restoration for full-mouth tooth loss, implant-supported fixed denture restoration, implant-fixed bridge restoration for partial tooth loss, and single tooth restoration for implant denture. In particular, the immediate implant restoration of anterior teeth and the aesthetic restoration of implant prostheses are its specialties.