目的 应用外支架牵引成骨治疗复杂面中部后缩畸形.方法 对1例继发性面中部凹陷畸形、2例Crouzon综合征和1例Parry Romberg综合征患者,采取Le Fort Ⅲ型截骨或同时行Le Fort Ⅰ型截骨,应用颅面外支架牵引装置对目标骨块进行牵引治疗.牵引开始于截骨后第7天,牵引速度为每天1 mm,牵引完成后,固定外支架牵引装置3个月.结果 所有病例按计划完成牵引,面中部前移10～14 mm,后缩畸形明显改善.结论 外支架牵引成骨技术是治疗各种复杂面中部后缩畸形的一种有效方法.%Objective To treat complicated midface deficiencies with external distraction device.Methods Four patients (one with acquired midface hypoplasia,two with Crouzon syndrome and one with Parry Romberg) with severe midface deficiencies underwent external distraction osteogenesis.After Le Fort Ⅲ or Le Fort Ⅲ plus Ⅰ osteotomies were performed,the external distraction devices were activated on the 7th postoperative day with a rate of 1 mm per day.The distraction devices were removed after consolidation for 3 months.Results All patients completed the distraction treatment.The distraction distance ranged from 10 to 14 mm.The appearance of all patients was significantly improved.Conclusions External distraction osteogenesis provides an effectively treatment for patients with severe and complicated midface deficiencies.
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