THE RELATIONSHIP BETWEEN THE STRUCTURAL AND ORTHOGONAL COMPRESSIVE PROPERTIES OF TRABECULAR BONE
THE RELATIONSHIP BETWEEN THE STRUCTURAL AND ORTHOGONAL COMPRESSIVE PROPERTIES OF TRABECULAR BONE
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DOI：
10.1016/0021-9290(94)90014-0
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发表时间：
1994-04-01
影响因子：
2.4
通讯作者：
FELDKAMP, LA
中科院分区：
文献类型：
--
作者：
GOULET, RW;GOLDSTEIN, SA;FELDKAMP, LA
在这项研究中，立方体的骨小梁具有广泛的结构特性进行了扫描的微型计算机断层扫描系统，以产生完整的三维数字化的形态和建筑参数，可以在一个非破坏性的方式进行测量。然后在三个正交方向上对立方体进行单轴压缩力学测试，并在一个方向上破坏，以找到正交切线弹性模量和极限强度。测试后，将立方体称重并灰化以确定表观密度和灰分密度。发现基本体视学测量值之间存在高度相关性，表明松质骨中的骨量和骨小梁数量之间存在相关性。回归分析被用来估计的模量和极限强度，这些回归占68 - 90%的方差在这些措施。这些关系取决于干骺端类型和供体，模量也取决于测试方向。这表明单个骨小梁的性质，以及它们的数量和组织，在预测松质骨的力学性能方面可能是重要的。
In this study, cubes of trabecular bone with a wide range of structural properties were scanned on a micro-computed tomography system to produce complete three-dimensional digitizations from which morphological and architectural parameters could be measured in a nondestructive manner. The cubes were then mechanically tested in uniaxial compression in three orthogonal directions and to failure in one direction to find the orthogonal tangent elastic moduli and ultimate strengths. After testing, the cubes were weighed and ashed to determine the apparent and ash densities. A high correlation between the basic stereologic measurements was found, indicating that there is a relationship between the amount of bone and number of trabeculae in cancellous bone. Regression analysis was used to estimate the modulus and ultimate strength; these regressions accounted for 68 90% of the variance in these measures. These relationships were dependent on the metaphyseal type and donor, with the modulus also dependent on the direction of testing. This indicates that the properties of the individual trabeculae, as well as their amount and organization, may be important in predicting the mechanical properties of cancellous bone.