1P1-B17 微視構造特性による骨強度評価

概要

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Bone consists of a collagen-hydroxyapatite composite at the lower hierarchical level. Even if the damage or failure in the macroscopic level is not observable, mechanical failures might have significantly occurred in these lower level structures. Hence, it is necessary to understand deformation mechanisms at such level to predict the strength and potential of failures in bone tissue as a whole. In this study, the effect of loading on crystallites organization and internal strains developed in bone has been examined. Cortical samples having preferred alignments of crystallites along the longitudinal and transverse directions of bovine femur are investigated under repeated tensile loads applied at different steps. The parameter defined as Degree of Orientation (DO), obtained from X-ray diffraction procedures, provides the average quantitative value of distributed mineral crystals, and hence has been used to obtain the effective volume of crystals. The effect of mineral distribution on estimating elastic properties of bone has been discussed.
一般社団法人日本機械学会の論文