Mechanisms of load transfer in the cadaver forearm: Role of the interosseous membrane
Mechanisms of load transfer in the cadaver forearm: Role of the interosseous membrane
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DOI：
10.1053/jhsu.2000.8640
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发表时间：
2000-07-01
影响因子：
1.9
通讯作者：
Hannani, K
中科院分区：
文献类型：
--
作者：
Markolf, KL;Dunbar, AM;Hannani, K
当尸体前臂通过腕关节轴向加载时，记录了通过尺骨远端和桡骨近端传递的力、桡骨头和肱骨小头之间的相对运动以及骨间膜中央带内组织应变和局部纤维张力的测量。当肘关节外翻对准时（桡骨头与小头直接接触），施加在手腕上的平均93%的力直接通过桡骨转移到肘关节，没有明显的负荷通过骨间膜转移。随着内翻对准（桡骨头与肱骨小头之间的初始间隙），施加于腕关节的载荷使桡骨近端平均移位1.1 mm，直至桡骨头接触发生，平均施加腕部力为89.0 n。桡骨近端移位在骨间膜中央带产生应变，形成更尺侧正的腕关节，这反过来又增加了尺侧远端载荷；尺骨远端力平均占19%，骨间膜力平均占54%。尺骨远端负荷不受25度腕屈伸或20度尺桡偏的影响。当尺侧偏离40度时，外翻和内翻肘关节矫正时，平均远端尺侧力分别为手腕力的18%和48%。在任何手腕位置222.5 N和133.5 N的施加力之间，手腕和肘部的平均负荷分担百分比没有显著差异，并且不受肘关节屈曲角度的影响。[J] .中华手外科杂志2000；25(1):674-682。版权所有(C) 2000由美国手部外科学会)。
Forces transmitted through the distal ulna and proximal radius, relative motion between the radial head and capitellum, and measurements of tissue strain and local fiber tension within the central band of the interosseous membrane were recorded as cadaveric forearms were loaded axially through the wrist. With the elbow in valgus alignment (the radial head in direct contact with the capitellum), an average of 93% of force applied to the wrist was transferred directly through the radius to the elbow with no appreciable load transfer through the interosseous membrane. With varus alignment (initial gap between the radial head and capitellum) load applied to the wrist displaced the radius proximally an average of 1.1 mm until radial head contact occurred at a mean applied wrist force of 89.0 N. Proximal displacement of the radius generated strain in the central band of the interosseous membrane and created a more ulnar positive wrist, which in turn increased distal ulnar loading; distal ulnar force averaged 19% and interosseous membrane averaged 54% of applied wrist force. Distal ulnar loading was unaffected by 25 degrees wrist flexion-extension or by 20 degrees of radioulnar deviation. With 40 degrees ulnar deviation, mean distal ulnar forces were 18% and 48% of applied wrist force for valgus and varus elbow alignments, respectively. Mean load-sharing percentages at the wrist and elbow were not significantly different between 222.5 N and 133.5 N of applied force for any wrist position and were unaffected by the angle of elbow flexion. (J Hand Surg 2000;25A:674-682. Copyright (C) 2000 by the American Society for Surgery of the Hand).