Surface fissures in articular cartilage: new concepts,, hypotheses and modeling
Surface fissures in articular cartilage: new concepts,, hypotheses and modeling
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DOI：
10.1016/s0268-0033(01)00095-x
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发表时间：
2002-01-01
影响因子：
1.8
通讯作者：
Kafka, V
中科院分区：
文献类型：
--
作者：
Kafka, V
objective.关节软骨表面裂隙形成的阐明和细观力学建模。设计。关节软骨是一种宏观上不均匀的介质，由不同方向的胶原纤维组成。软骨力学性能的退化是一个严重的，仍然没有完全澄清的问题，值得关注。理论分析基于对与该主题相关的已知实验结果的调查。一般作者的细观力学的概念建模异质介质的解释和描述的裂缝的形成在表面或关节软骨。我们的模型阐明了表面切线区胶原纤维的高张应力如何依赖于加载速率。表面裂纹主要是由快速加载引起的。这也解释了运动事故和受伤后下肢创伤后骨关节炎的高发病率。
Objective. Clarification and mesomechanical modeling of the inception of fissures at the surface of articular cartilage.Design. Articular cartilage is described as a macroscopically heterogeneous medium consisting of zones layers with different orientation of collagen fibers.Background. Degradation of mechanical properties of cartilage is a serious, still not fully clarified problem that deserves attention.Methods. Theoretical analysis based oil a survey of known experimental findings related to the Subject. The general author's mesomechanical concept of modeling heterogeneous media is applied to the elucidation and description of the formation of fissures at the surface or articular cartilage.Results. Our model clarifies how the high tensile stresses in the collagen fibers of the superficial tangential zone depend oil the rate of loading.Conclusions. The superficial cracks are caused predominantly by a very quick loading. This explains among others the high incidence of post-traumatic osteoarthritis of the lower extremity after accidents and injuries in sports.