Biphasic investigation of contact mechanics in natural human hips during activities.
Biphasic investigation of contact mechanics in natural human hips during activities.
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DOI：
10.1177/0954411914537617
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发表时间：
2014-06
期刊：
影响因子：
--
通讯作者：
Wilcox RK
中科院分区：
文献类型：
--
作者：
Li J;Hua X;Jin Z;Fisher J;Wilcox RK
本研究的目的是使用具有双相软骨层和通用几何形状的三维有限元髋关节模型，确定八种日常活动下髋关节的软骨接触力学和相关流体加压。随着时间的推移施加具有空间和时间变化的载荷，并且还评估了行走期间髋关节软骨的时间依赖性性能。结果发现，在所有8个活动的大多数循环期间，液体支持率超过90%。在接触区域滑向髋臼软骨内边缘的时间内观察到液体支持率降低，但这些发生在峰值接触应力的绝对水平最小时。超过10个周期的步态，峰值接触应力和峰值流体压力保持不变，但更快的过程中观察到的髋臼软骨的内部边缘区域的流体渗出。结果表明髋关节软骨的优异功能，其中固体基质在活动期间由于流体加压所分担的负荷而被防止免受高水平的应力。这些发现对于更好地了解日常活动中的髋关节功能，以及髋关节退行性变的病理学和未来干预的潜力非常重要。他们提供了一个基础，为未来的主题特定的双相调查髋关节的性能在活动中。
The aim of this study was to determine the cartilage contact mechanics and the associated fluid pressurisation of the hip joint under eight daily activities, using a three-dimensional finite element hip model with biphasic cartilage layers and generic geometries. Loads with spatial and temporal variations were applied over time and the time-dependent performance of the hip cartilage during walking was also evaluated. It was found that the fluid support ratio was over 90% during the majority of the cycles for all the eight activities. A reduced fluid support ratio was observed for the time at which the contact region slid towards the interior edge of the acetabular cartilage, but these occurred when the absolute level of the peak contact stress was minimal. Over 10 cycles of gait, the peak contact stress and peak fluid pressure remained constant, but a faster process of fluid exudation was observed for the interior edge region of the acetabular cartilage. The results demonstrate the excellent function of the hip cartilage within which the solid matrix is prevented from high levels of stress during activities owing to the load shared by fluid pressurisation. The findings are important in gaining a better understanding of the hip function during daily activities, as well as the pathology of hip degeneration and potential for future interventions. They provide a basis for future subject-specific biphasic investigations of hip performance during activities.
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DOI：
10.1115/1.2953472
发表时间：
2008-10
期刊：
Journal of biomechanical engineering
影响因子：
--
作者：
Anderson AE;Ellis BJ;Maas SA;Peters CL;Weiss JA
通讯作者：
Weiss JA
影响因子：
2.4
作者：
Bergmann, G;Deuretzbacher, G;Duda, GN
通讯作者：
Duda, GN
DOI：
10.1115/1.3138202
发表时间：
1980-01-01
影响因子：
1.7
作者：
MOW, VC;KUEI, SC;ARMSTRONG, CG
通讯作者：
ARMSTRONG, CG
影响因子：
2.8
作者：
ATHANASIOU, KA;AGARWAL, A;DZIDA, FJ
通讯作者：
DZIDA, FJ
影响因子：
2.4
作者：
Ferguson, SJ;Bryant, JT;Ito, K
通讯作者：
Ito, K