Microscopic Multi-Directional Mechanical Properties of Human Femoral Cancellous Bone Tissue

摘要

Multi-directional mechanical properties of human cancellous bone tissue were never measured using a compressive test with microscopic cubic specimens. In this study, a small scale compressive testing machine with nano meter resolution and a measurement system for Poisson's ratio with sub-nano meter resolution were developed to measure accurate microscopic mechanical properties of human CBT. The measured mean longitudinal (E_1), postero-anterior (E_2), and latero-medial (E_3) elastic moduli were 3.47 GPa (S.D. ±0.41), 2.57 GPa (S.D. ±0.28), and 2.54 GPa (S.D. ±0.22), respectively. ANOVA showed that the longitudinal elastic modulus (E_1) was significantly (p < 0.01) greater than the postero-anterior (E_2) and latero-medial (E_3) elastic moduli. For Poisson's ratios, v_(12) was significantly (p < 0.01) higher than v_(23) and v_(31).