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作为获得性和先天性短肢延长的优良方法Ilizarov装置及方法已介绍至北美并迅速推广应用。该装置由环形外固定架构成,通过拉紧细穿刺针维持长骨的位置。由螺杆连接环形外固定架达到分离和压缩的目的。成角畸形由绞链结构校正。Ilizarov设计的经皮骨切开术(皮质切开)保留了骨膜的完整并避免损伤髓腔。最初5～15天潜伏期后,开始以每日4次每次0.25mm的速率分离。当达到要求的延长后,要待再生骨充分骨化支持肢体时恰当地拆除外固定架。其间需要测量影象中分离间隙的长度和证实新骨的形成。分离可依新骨形成的比率而调整其快慢。过快的分离将抑制新骨形成,而过慢的分离将导致过早的骨联合。儿童的年龄,基础骨病理和皮质切开的解剖部位均影响新骨形成的
Ilizarov Devices and Methods as Superior Methods for Acquired and Congenital Limb Prolongations has been introduced in North America and is rapidly being promoted. The device consists of an annular outer holder that holds the long bones by tightening the fine needle. By the screw to connect the ring outside the fixed frame to achieve the purpose of separation and compression. Angular deformity is corrected by the hinge structure. Ilizarov’s percutaneous osteotomy (corticotomy) preserves the integrity of the periosteum and avoids damage to the medullary canal. After the first 5 to 15 days of incubation, begin at 0.25 mm daily at 4 times intervals. When the required extension is achieved, the outer cage needs to be properly dismantled when the regenerated bone is sufficiently ossified to support the limb. During which the length of the separation gap in the image needs to be measured and the formation of new bone confirmed. Separation can be based on the rate of new bone formation and adjust its speed. Excessive detachment will inhibit new bone formation, whereas too slow detachment will result in premature bone union. Age of children, underlying bone pathology, and cortical dissection of the anatomical site all affect new bone formation