Maxilla LeFort丨Distraction osteogenesis after osteotomy and bilateral sagittal split osteotomy of mandible

After two years of orthodontic decompensation treatment, the patient was evaluated for simple LeFort osteotomy. Sagittal split osteotomy of the mandible could not solve the problems of insufficient maxillary bone and huge overjet distance between the upper and lower jaws. At present, retractors are divided into intra-oral and extra-oral retractors. The huge shape of extra-oral retractors will not only leave scars on the face but also affect the patient's normal life. There is currently no suitable finished retractor in the domestic market for intra-oral retractors. The hospital's orthodontic and orthognathic team digitally designed and simulated the feasibility of the surgical plan for the patient, and carried out after-sales modification of the built-in distraction osteogen. Based on preoperative digital analysis and simulation, the patient underwent maxillary LeFort I osteotomy, bilateral maxillary distraction osteogenesis, and mandibular sagittal split osteotomy.

Cao Kun, deputy chief physician

Ningxia Medical University General Hospital

Director of the Department of Oral and Maxillofacial Surgery, School of Stomatology, Ningxia Medical University

Member of the Communist Party of China, Master of Stomatology, Ningxia Medical University's outstanding young backbone reserve talent, and the fifth batch of "Talent Promotion" project of Ningxia Autonomous Region. Executive director of the Surgery Branch of the Chinese Society of Ethnographic Medicine and member of the Oral and Maxillofacial Tumor Integrated Rehabilitation Professional Committee of the Chinese Anti-Cancer Association.

Engaged in oral and maxillofacial surgery for 10 years. Professional expertise: clinical, scientific research and teaching work in complex craniofacial trauma repair and reconstruction and personalized, precise, minimally invasive plastic surgery; sequential treatment of dentofacial deformities; digital surgical technology; joint surgery; alveolar surgery, etc.

Hosted 3 provincial projects, 1 school-level project, and participated in 3 National Natural Science Foundation projects. Published 9 academic papers, including 4 SCI papers, and participated in the editing of 1 book. The team's research results won the second prize of the Autonomous Region Science and Technology Progress Award (ranked 2nd). In 2020, members of the third batch of Ningxia's medical aid team to Hubei won the "Advanced Individual" of the autonomous region and the "Most Contributing Person Award" in the Chinese health industry. He was awarded the Most Favorite Young Teacher of Ningxia Medical University twice, and was awarded the "Outstanding Individual" and "Outstanding Communist Party Member" of the General Hospital of Ningxia Medical University eight times. There were 2 first prizes, 2 second prizes, and 3 third prizes for the hospital’s new technologies and new businesses. The first prize in the 3rd National 3D Printing Innovation Competition, the first prize in the 2nd Ningxia Autonomous Region Employee Scientific and Technological Achievements Innovation Competition, and the 7th National Employee Outstanding Technological Innovation Achievements Outstanding Achievements.

Zhou Zhongwei Deputy Chief Physician

Ningxia Medical University General Hospital

Deputy Director of Oral and Maxillofacial Surgery, School of Stomatology, Ningxia Medical University

Member of the Communist Party of China, Doctor of Stomatology, graduated from West China School of Stomatology, Sichuan University, and currently works in the Department of Oral and Maxillofacial Surgery, Stomatological Hospital, Ningxia Medical University General Hospital, as deputy director of department administration and postgraduate tutor. A "Light of the West" talent from the Organization Department of the Central Committee of the Communist Party of China, he studied under the guidance of Academician Zhang Zhiyi, a famous expert in oral and maxillofacial surgery in my country. The autonomous region's top youth project talents, youth science and technology project talents (first batch), and winners of the autonomous region's outstanding youth fund. He concurrently serves as the Oral and Maxillofacial Surgery Special Committee, the Trauma and Orthognathic Special Committee, the Dental and Alveolar Surgery Special Committee, the Youth Committee of the Scientific Research Management Branch of the Chinese Stomatological Association, a member of the Oral Medicine Professional Committee of the Chinese Society of Health Information and Healthcare Big Data, and a director of the Craniofacial Surgery Branch of the Chinese Plastic Surgery Association.

He has long been engaged in basic and clinical research on the correction of congenital and acquired craniofacial deformities. Hosted and participated in 7 national, provincial and ministerial level projects, published 27 papers in journals including Nature Communication, J Imaging Inform Med, BMC Oral Health, etc., including 15 SCI papers (9 first author/corresponding author), was approved for 3 national patents, 1 computer software copyright, and 2 second prizes for the Autonomous Region Science and Technology Progress Award (both ranked 4th).

Ningxia Medical University General Hospital口腔颌面外科整体处于国内领先水平，其医疗、教学、科研实力雄厚，学术梯队知识、年龄结构合理，并已在一些领域取得较大成绩，如由黄永清教授研究的“先天性唇腭裂的临床序列治疗与遗传病因学研究”已处于国内先进水平，并紧跟国际研究水平，经过多年的发展，口腔颌面外科已形成了一支技术力量雄厚，高学历、高素质的医、教、研队伍。全科参与“十三五”重点研究计划子项目1项，获得国家自然基金6项，自治区级科研项目12项，科研基金累计超过500万，以一作共发表SCI论文30余篇，国内核心期刊百余篇。与北京大学口腔医学院、上海市第九人民医院、四川大学华西口腔医院等国内知名院校建立了长期、稳定的合作交流关系。并在上海交通大学张志愿院士带领下，参与国家级口腔疾病临床研究多中心课题，规范我区中晚期口腔鳞癌治疗流程，提高我区中晚期口腔鳞癌诊疗水平。
Ningxia Medical University General Hospital口腔颌面外科学现设有颅颌面先天及后天畸形、颅颌面创伤与正颌外科、头颈部肿瘤、牙齿种植、美容整形、牙与牙槽外科学、无痛拔牙。各个专业均由医、教、研经验丰富的专家带队，人员构成合理，梯队建设健全。我们秉承“以患者为中心，优质服务”宗旨，利用先进的技术和设备，为广大患者提供优质服务。牙与牙槽外科学包括牙外科、牙种植及托牙修复前外科等；口腔颌面部损伤学包括急救、软硬组织器官损伤的处理与康复治疗以及颌骨骨折愈合的机理和固定方法等方面的研究；口腔颌面部肿瘤学包括肿瘤病因（肿瘤局部生物学行为）与防治的研究；特别是化疗、放疗治疗及以外科治疗为主的综合治疗方面的研究；口腔颌面整形学包括口腔颌面部的先天性畸形与获得性缺损畸形的病因与防治，特别是包括显微外科在内的各型口腔颌面部组织器官缺损畸形的外科整复治疗和美容外科学等方面的研究；口腔颌面部美容：包括软组织去脂、软组织充填、颌骨磨削、颌骨改形等面部轮廓整形；眼、耳、鼻、唇、颊部整形美容；面部年轻化、面部除皱；颌面部疤痕整形；痣切除等。正颌外科学包括先天性后天性牙颌颅面畸形的病因、诊断和治疗方面的研究；颞颌关节病学包括流行病学调查、诊断、外科关节内窥镜及外科治疗方面的研究。特别在：唇腭裂的分子遗传病因和环境暴露影响因素；口腔组织工程与再生修复；头颈、口腔颌面部肿瘤、创伤的防治、整复；口腔疾病的病因及遗传学；种植体周围炎骨缺损修复等领域研究水平达到了西部先进甚至国内领先。

Prevention and treatment of benign and malignant tumors in oral and maxillofacial surgery, such as tongue cancer, cheek cancer, jaw cancer, various head, neck and maxillofacial cysts, hemangiomas, etc. Congenital cleft lip (rabbit lip), cleft palate, oral and maxillofacial trauma first aid, jaw fractures and soft tissue injuries caused by various traumas; maxillofacial plastic surgery and cosmetology, combined orthodontic and orthognathic treatment of malocclusion, jaw deformity, ear and nose defects, repair and correction of facial and maxillofacial scar deformities; infection, treatment of neurological diseases, such as parotid gland inflammation, osteomyelitis of the jaw, pericoronitis, trigeminal neuralgia, facial nerve paralysis, severe and complex cellulitis of the head and neck, critical space infection, etc.; diagnosis and treatment of temporomandibular joint diseases, such as temporomandibular joint pain, snapping, dislocation, limited mouth opening, etc.; alveolar surgery, performing tooth extraction and various surgical operations before denture repair. Dental implant treatment, prevention and treatment of oral diseases in the elderly, etc.
The daily work of the Oral and Maxillofacial Surgery Clinic mainly includes diagnosis and preliminary treatment of oral and maxillofacial diseases; various tooth extractions, tooth replantation, dental transplantation and dental implants; alveolar plastic surgery and frenulum correction; resection of benign small masses in the oral cavity and maxillofacial neck; tumor biopsy; maxillofacial plastic and cosmetic surgery; debridement and suturing of oral and maxillofacial neck trauma; incision and drainage of localized small abscesses, etc. There are expert outpatient clinics, and specialist outpatient clinics are set up according to the needs of patients and department expertise, including oncology, trauma repair and reconstruction, orthodontics and orthognathic combined treatment, hemangioma, temporomandibular joint disease, cleft lip and palate deformity repair and other targeted diagnosis and treatment.

In terms of teaching, the Department of Oral and Maxillofacial Surgery is responsible for the teaching of oral medicine for three-year, five-year, master's degree students, international students, and regular trainees of the School of Stomatology. Graduates are mainly assigned to work in general hospitals across the country.

The scientific research platform relies on the "Ningxia Branch of the National Clinical Research Center for Oral Diseases" and the "Minning Digital Oral Technology and Materials Research Institute of Ningxia Medical University". Our hospital has joined the branch center unit of the National Clinical Research Center for Oral Diseases of Peking University Stomatological Hospital and the "core unit" of the National Clinical Research Center for Oral Diseases of the Air Force Medical University Stomatological Hospital. This is an important sign that the development of our hospital has reached a new level, and fully demonstrates the important position of the Stomatological Hospital of Ningxia Medical University General Hospital in the field of dental academic fields. Academician Zhang Zhiyi, Zhang Chenping, Zhang Yi, Shi Bing, Hu Kaijin, Ye Ling, Zhou Xuedong, Wang Songling and other well-known professors at home and abroad are specially appointed experts in the autonomous region of our hospital, which promotes cooperation in academic exchanges, talent training, clinical care and other fields in our hospital, and promotes the healthy and rapid development of dental medicine in the region.