关键词: 下颌骨；缺损；髁突；重建；牵引成骨

Abstract:

Summary：Condylar defects and ramus hypoplasia usually result from trauma， temporomandibular joint ankylosis，congenital and acquired deformities，which may lead to disturbed masticatory function and compromised facial aesthetics. This common clinical disease seriously impairs patient’s physical and mental health. Without immune reaction and donor site injury，distraction osteogenesis is an ideal modality in the reconstruction of condylar defect. Condyle-like structure and morphology can be obtained by precisely adjusting distraction vector and distance. The deficiency of soft tissue can also be corrected in the distraction process. This paper summarizes the application of distraction osteogenesis to the condylar defect reconstruction based on author’s experience and relevant literature，emphasizing the time of treatment， preoperative design and simulation， as well as discussing the intraoperative and post-operative key technical points.

Key words: mandible；defect；condyle；reconstruction；distraction osteogenesis