Carpal Tunnel and Transverse Carpal Ligament Stiffness with Changes in Wrist Posture and Indenter Size
Carpal Tunnel and Transverse Carpal Ligament Stiffness with Changes in Wrist Posture and Indenter Size
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DOI：
10.1002/jor.21442
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发表时间：
2011-11-01
影响因子：
2.8
通讯作者：
Keir, Peter J.
中科院分区：
文献类型：
--
作者：
Holmes, Michael W. R.;Howarth, Samuel J.;Keir, Peter J.
本研究探讨了载荷和姿势对腕横韧带（TCL）力学性能的影响。解剖10具新鲜冷冻尸体手臂，暴露TCL，并将其定位在配备有测力传感器和定制压头的伺服液压试验机的载荷框架中。四个圆柱形压头（5、10、20和35 mm）以三种腕部姿势（30度伸展、中立和30度屈曲）加载TCL。在每种条件下，以5 N/s的速度施加峰值力为50 N的三个加载循环。屈腕姿势的TCL刚度（40.0 +/- 3.3 N/mm）显著高于中立姿势（35.9 +/- 3.5 N/mm，p = 0.045）和伸展姿势（34.9 +/- 2.8 N/mm，p = 0.025）。使用10和20 mm压头的TCL刚度大于5 mm压头。20 mm压头的刚度最大，其在TCL上具有最大的压头接触面积。35 mm压头覆盖腕骨，压缩腕管并产生最低刚度。TCL的复杂性使其成为腕管的重要组成部分，所发现的机械特性对于理解腕管综合征的机制至关重要。(C)2011骨科研究学会。由威利期刊公司出版J Orthop Res 29：1682-1687，2011
This study investigated the effects of loading and posture on mechanical properties of the transverse carpal ligament (TCL). Ten fresh-frozen cadaver arms were dissected to expose the TCL and positioned in the load frame of a servo-hydraulic testing machine, equipped with a load cell and custom made indenters. Four cylindrical indenters (5, 10, 20, and 35 mm) loaded the TCL in three wrist postures (30 degrees extension, neutral and 30 degrees flexion). Three loading cycles with a peak force of 50 N were applied at 5 N/s for each condition. The flexed wrist posture had significantly greater TCL stiffness (40.0 +/- 3.3 N/mm) than the neutral (35.9 +/- 3.5 N/mm, p = 0.045) and extended postures (34.9 +/- 2.8 N/mm, p = 0.025). TCL stiffness using the 10 and 20 mm indenters was larger than the 5 mm indenter. Stiffness was greatest with the 20 mm indenter, which had the greatest indenter contact area on the TCL. The 35 mm indenter covered the carpal bones, compressed the carpal tunnel and produced the lowest stiffness. The complexity of the TCL makes it an important part of the carpal tunnel and the mechanical properties found are essential to understanding mechanisms of carpal tunnel syndrome. (C) 2011 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 29:1682-1687, 2011