MATERIAL PROPERTIES OF THE NORMAL MEDIAL BOVINE MENISCUS
MATERIAL PROPERTIES OF THE NORMAL MEDIAL BOVINE MENISCUS
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DOI：
10.1002/jor.1100070602
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发表时间：
1989-11-01
影响因子：
2.8
通讯作者：
MOW, VC
中科院分区：
文献类型：
--
作者：
PROCTOR, CS;SCHMIDT, MB;MOW, VC
测量了正常牛内侧半月板的固有压缩和拉伸性能，并研究了这些性能相对于组织的结构组织和试样位置的变化。通过受限压缩实验，测定了半月板的压缩聚集模量和渗透性。还将组织的渗透性与直接渗透实验所测得的渗透性进行了比较。后深部试样在压缩时比前深部和中前部试样硬得多，而前深部试样比后深部和中后部试样软得多。后部试样的平均含水量明显较高。此外，发现牛半月板的渗透性约为牛关节软骨的十分之一。通过恒应变率单轴拉伸试验测定了半月板组织的拉伸刚度。为了评估拉伸性能的方向变化，从圆周向和径向获取试样。结果表明，半月板的股骨面在拉伸时是各向同性的，而来自半月板内部的试样是各向异性的——圆周向试样比径向试样硬得多。此外，来自半月板内部的后圆周向试样比类似的前向试样硬得多。在拉伸性能方面，相对于距股骨面的距离也存在层间不均匀性。
The intrinsic compressive and tensile properties of normal bovine medial menisci were measured, and the variations in these properties with respect to the structural organization of the tissue and test specimen location were examined. Using a confined compression experiment, the compressive aggregate modulus and permeability of the meniscus were determined. The permeability of the tissue was also compared with the permeability as measured experimentally using a direct permeation experiment. Deep posterior specimens are significantly stiffer in compression than deep anterior and central-anterior specimens, while deep anterior specimens are significantly less stiff than deep posterior and central-posterior specimens. Posterior specimens have a significantly higher average water content. In addition, the permeability of the bovine meniscus was found to be about one-tenth that of bovine articular cartilage. The tensile stiffness of meniscal tissue was determined from constant strain rate uniaxial tension tests. To assess the directional variations in the tensile properties, specimens were obtained from the circumferential and radial orientations. The results indicate that the femoral surface of the meniscus is isotropic in tension, while specimens from within the meniscus are anisotropic.sbd.the cirumferential specimens are much stiffer than the radial specimens. Furthermore, circumferential posterior specimens from the interior of the meniscus are significantly stiffer than similar anterior specimens. Layer inhomogeneities in the tensile properties with respect to distance from the femoral surface are also present.