Improving vastus medialis obliquus function reduces pressure applied to lateral patellofemoral cartilage.
Improving vastus medialis obliquus function reduces pressure applied to lateral patellofemoral cartilage.
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DOI：
10.1002/jor.20791
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发表时间：
2009-05
影响因子：
2.8
通讯作者：
Cosgarea, Andrew J.
中科院分区：
文献类型：
--
作者：
Elias, John J.;Kilambi, Srianjana;Goerke, Derek R.;Cosgarea, Andrew J.
本研究旨在描述股内侧肌（VMO）功能改善对髌股软骨压力的影响。另一个重点是表征外侧和内侧软骨病变如何影响软骨压力。10个膝关节在体外屈曲40°、60°和80°，施加力以代表股四头肌组的VMO和其他肌肉，同时薄膜传感器测量关节压力。膝关节承受正常VMO力，VMO力降低约50%，VMO未加载。在软骨完整的情况下进行测试后，重复所有测试，在外侧软骨内创建12 mm直径的损伤，用硅胶修复外侧损伤，并创建内侧损伤。基于双向重复测量ANOVA和事后检验，增加VMO施加的力显著（p < 0.05）降低了每个屈曲角度的最大外侧压力，并显著增加了最大内侧压力。外侧软骨损伤显著增加了最大外侧压力，而内侧损伤对最大内侧压力没有显著影响。改善VMO功能可以减少外侧损伤时施加在外侧软骨上的压力。
The current study was performed to characterize how improving vastus medialis obliquus (VMO) function influences the pressure applied to patellofemoral cartilage. An additional focus was characterizing how lateral and medial cartilage lesions influence cartilage pressures. Ten knees were flexed to 40°, 60° and 80° in vitro, and forces were applied to represent the VMO and other muscles of the quadriceps group while a thin film sensor measured joint pressures. The knees were loaded with a normal VMO force, with the VMO force decreased by approximately 50%, and with the VMO unloaded. After tests were performed with the cartilage intact, all tests were repeated with a 12 mm diameter lesion created within the lateral cartilage, with the lateral lesion repaired with silicone, and with a medial lesion created. Based on a two-way repeated measures ANOVA and post-hoc tests, increasing the force applied by the VMO significantly (p < 0.05) decreased the maximum lateral pressure and significantly increased the maximum medial pressure at each flexion angle. A lateral cartilage lesion significantly increased the maximum lateral pressure, while a medial lesion did not significantly influence the maximum medial pressure. Improving VMO function can reduce the pressure applied to lateral cartilage when lateral lesions are present.
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