CHANGES IN THE DEFORMATIONAL BEHAVIOR OF HUMAN HIP CARTILAGE WITH AGE
CHANGES IN THE DEFORMATIONAL BEHAVIOR OF HUMAN HIP CARTILAGE WITH AGE
复制标题
DOI：
10.1115/1.3149576
复制
发表时间：
1980-01-01
影响因子：
1.7
通讯作者：
GARDNER, DL
中科院分区：
文献类型：
--
作者：
ARMSTRONG, CG;BAHRANI, AS;GARDNER, DL
测量了股骨头在其自然髋臼中加载时和用小压头加载时覆盖人股骨头的关节软骨中发生的变形。结果表明，在这两种情况下，材料的反应是有很大的不同。在完整的关节中，软骨变形在老年关节中显著更大，但软骨对压头加载的响应不随年龄显著变化。分析了这两种情况下软骨行为的理论弹性模型。对于理想化为弹性材料的旧软骨，在完整关节中观察到的变形增加可归因于泊松比的变化，尽管在真实的材料中，在负荷下增加的流体通量是更可能的原因。
The deformation occurring in the articular cartilage covering the human femoral head has been measured both when the femoral head is loaded in its natural acetabulum and when the cartilage is loaded with a small indentor. The results indicate that the material response is substantially different in these two situations. In the intact joint the cartilage deformation is substantially greater in older joints, but the response of cartilage to loading with an indentor does not change significantly with age. Theoretical elastic models of the cartilage behavior in these two situations were analyzed. For old cartilage which is idealized as an elastic material the increased deformation which is observed in the intact joint can be attributed to changes in Poisson’s ratio, though in the real material increased fluid flux under load is the more probable cause.