Hobatho M C, Rho J Y, Ashman R B
INSERM U305, Hôtel Dieu, Toulouse, France.
Stud Health Technol Inform. 1997;40:157-73.
The aim of the study was to assess mechanical properties of human cancellous bone in vitro. Six hundred cubic specimens of cancellous bone were obtained from the tibia, femur, patella, lumbar spine and humerus of eight subjects. The elastic properties were assessed using an ultrasonic transmission technique developed and validated by Ashman (1). The results showed that differences exist between subjects significantly (p < 0.05) and that the mechanical properties vary along the length and the periphery (about a factor 3 to 5). Cancellous bone should be considered heterogeneous and as orthotropic materials exhibiting degrees of anisotropy varying from 2 to 4. Linear and power fit elationships for cancellous bone were found approximately equal. Powers vary from 1.3 to 1.7 for axial modulus versus density and 1.3 and 2.3 for strength versus density. Finally, these results suggest the use of appropriate mechanical properties upon the type of bone for finite element analysis.
本研究的目的是在体外评估人松质骨的力学性能。从8名受试者的胫骨、股骨、髌骨、腰椎和肱骨获取了600个立方松质骨标本。使用由阿什曼（1）开发并验证的超声透射技术评估弹性性能。结果表明，受试者之间存在显著差异（p < 0.05），并且力学性能沿长度和周边变化（约为3至5倍）。松质骨应被视为非均质且正交各向异性材料，其各向异性程度在2至4之间变化。发现松质骨的线性和幂拟合关系大致相等。轴向模量与密度的幂在1.3至1.7之间，强度与密度的幂在1.3至2.3之间。最后，这些结果表明在有限元分析中应根据骨的类型使用适当的力学性能。
