Mechanical properties of the posterolateral structures of the knee
Mechanical properties of the posterolateral structures of the knee
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DOI：
10.1177/0363546504274143
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发表时间：
2005-09-01
影响因子：
4.8
通讯作者：
Meister, K
中科院分区：
文献类型：
--
作者：
LaPrade, RF;Bollom, TS;Meister, K
背景：先前的研究还没有很好地阐明腓侧副韧带、月国腓韧带和月国肌腱的个体生物力学特性。为了确定膝关节后外侧重建所需的强度要求，需要确定膝关节后外侧主要个体结构的这些特性。假设：通过身体测试可以确定腓侧副韧带、月国腓韧带和月国肌腱的生物力学破坏特性。研究设计：描述性实验室研究。方法：在8个新鲜冷冻的非成对身体膝关节上，分别分离每个结构，以超过100%的载荷破坏。结果：腓侧副韧带的平均极限抗拉强度为295N，月国韧带为298N，这些结构的中点横截面积分别为11.9 mm(2)、17.1 mm(2)和21.9 mm(2)。尽管腓侧副韧带的硬度(33.5N/m)与月国韧带的硬度(28.6N/m)相近，但月国肌腱的硬度明显高于两者(83.7N/m)。结论：月国韧带、腓侧副韧带和月国肌腱在断裂前可以承受较大的载荷。了解主要的国产膝关节后外侧稳定器的强度将有助于为这些结构选择重建移植物。
Background: The individual biomechanical strength properties of the fibular collateral ligament, popliteofibular ligament, and popliteus tendon have not been well elucidated by previous studies. To define the necessary strength requirements for a posterolateral knee reconstruction, these properties for the main individual structures of the posterolateral knee need to be defined.Hypothesis: The biomechanical failure properties of the fibular collateral ligament, popliteofibular ligament, and popliteus tendon can be determined by cadaveric testing.Study Design: Descriptive laboratory study.Methods: Each structure was individually isolated in 8 fresh-frozen, nonpaired cadaveric knees and loaded to failure at more than 100 %/s.Results: The mean ultimate tensile strength of the fibular collateral ligament was 295 N, the popliteofibular ligament was 298 N, and the popliteus tendon was 700 N. The mean cross-sectional areas of these same structures at their midpoints were 11.9 mm(2), 17.1 mm(2), and 21.9 mm(2), respectively. Although the stiffness of the fibular collateral ligament (33.5 N/m) was similar to that of the popliteofibular ligament (28.6 N/m), the popliteus tendon was significantly stiffer than both (83.7 N/m).Conclusion: The popliteofibular ligament, fibular collateral ligament, and popliteus tendon can resist fairly large loads before failure. Knowledge of the strengths of the main native posterolateral knee stabilizers will assist with reconstructive graft choices for these structures.