Yang Zhi-cheng, Wang Xing, Yi Biao, Li Zi-li, Liang Cheng, Wang Xiao-xia
Peking University School of Stomatology, Beijing 100081, China.
Zhonghua Zheng Xing Wai Ke Za Zhi. 2009 Mar;25(2):104-7.
To study the application of distraction osteogenesis (DO) of the mandibular ramus in hemifacial microsomia.
From 1999 to 2006, 15 patients with hemifacial microsomia were treated with DO of the ramus, including 12 cases of children and juveniles, 3 cases of grown-ups. Maxillary Le Fort I osteotomy, unilateral sagittal split ramus osteotomy, genioplasty and free scapular flaps were selected to perform on the first or secondary stage of treatment.
Successful distraction was achieved in all patients with an average distraction distance of 21.25 mm. The distractor was removed after consolidation proved by clinical examination and X-ray. Facial appearance and and occlusal relationship were improved greatly. The occlusal plane was almost normal. There was no infection, malunion or permanent injury of inferior alveolar nerve.
DO of the ramus is very effective for the correction of severe hemifacial microsomia. It has much better therapeutic effect than traditional orthognathic procedures.
研究下颌升支牵张成骨术（DO）在半侧颜面短小畸形中的应用。
1999年至2006年，对15例半侧颜面短小畸形患者行下颌升支DO治疗，其中儿童及青少年12例，成年人3例。在治疗的第一或第二阶段选择上颌Le Fort I型截骨术、单侧矢状劈开下颌升支截骨术、颏成形术及游离肩胛皮瓣术。
所有患者均成功牵张，平均牵张距离为21.25mm。经临床检查及X线证实骨愈合后取出牵张器。面部外观及咬合关系明显改善。咬合平面基本正常。无感染、骨不连及下牙槽神经永久性损伤。
下颌升支DO对严重半侧颜面短小畸形的矫治非常有效。其治疗效果明显优于传统正颌手术。
