Elasticity–density and viscoelasticity–density relationships at the tibia mid-diaphysis assessed from resonant ultrasound spectroscopy measurements

摘要: Cortical bone tissue is an anisotropic material characterized by typically five independent elastic coefficients (for transverse isotropy) governing shear and longitudinal deformations in the different anatomical directions. It well established that Young’s modulus direction of axis long bones has a strong relationship with mass density. not clear, however, whether relationships similar strength exist for other coefficients, they have seldom been investigated, results available literature are contradictory. The objectives present work were to document properties cortical at tibia mid-diaphysis elucidate their Resonant ultrasound spectroscopy (RUS) was used measure isotropic stiffness tensor 55 specimens from 19 donors. Except Poisson’s ratios non-diagonal coefficient, linear correlations between $$(0.7 < {r^{2}} 0.99)$$ these density $$(0.79 0.89)$$ found. Comparison previously published data femur suggested evidenced this study may only be valid mid-tibia. RUS also measures viscous part tensor. An anisotropy ratio close two found damping coefficients. Damping increased as decreased. suggest relatively accurate estimation all mid-tibia can derived This particular interest (1) design organ-scale models which mapped according Hounsfield values computed tomography scans surrogate (2) model propagation mid-tibia, important site vivo assessment status axial transmission techniques.