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The elastic properties of human cortical bone measured by resonant ultrasound spectroscopy at multiple skeletal sites

Human cortical bone is an anisotropic material, although isotropic stiffness is generally assumed in most finite element analysis. Detailed information about the anisotropic stiffness at a mesoscopic (mm) scale would improve our understanding of bone's macroscopic mechanical properties. In this work, we report on the anisotropic stiffness of human cortical bone from different sites, and the variation in anisotropy seen.