Calhoun J H, Li F, Ledbetter B R, Gill C A
Division of Orthopaedic Surgery, University of Texas Medical Branch, Galveston 77550.
Clin Orthop Relat Res. 1992 Jul(280):15-22.
Compression, distraction, and torsion stiffness of the Ilizarov external fixator was measured in two fracture models in autopsy specimens of tibia and fibula. A transverse model was tested in six frame constructions with the osteotomy site preloaded in four different positions. An oblique model was tested in four frame constructions also with four preloaded positions. Stiffness was more dependent on bone preload than wire number, wire type, or frame design. High stiffness was achieved by bone preloading, by compressing the rings together, by increasing the number of wires, and by using olive wires. The stiffness can be decreased (dynamization) by separating the rings and by removing wires. This data is helpful for frame design of the Ilizarov fixator.
在胫骨和腓骨尸检标本的两种骨折模型中测量了伊利扎罗夫外固定器的压缩、牵引和扭转刚度。在六种框架结构中测试了一个横向模型，截骨部位在四个不同位置进行预加载。在四种框架结构中也测试了一个斜向模型，同样有四个预加载位置。刚度更多地取决于骨预加载，而不是钢丝数量、钢丝类型或框架设计。通过骨预加载、将环压缩在一起、增加钢丝数量以及使用橄榄形钢丝可实现高刚度。通过分离环和去除钢丝可降低（动态化）刚度。这些数据有助于伊利扎罗夫固定器的框架设计。
