Research Article

Internal Biomechanical Study of a 70-Year-Old Female Human Lumbar Bi-Segment Finite Element Model and Comparison with a Middle-Aged Male Model

Table 1

Summary of material properties for modeling, all material attributes are from Wayne State University(Where Ro-Mass density, E-Young’s modulus,PR-Poisson’s ratio).

Material Ro (kg/mm3)E (GPa)PR

Trabecular bone1.1000e-60.2000000.200000

Cortical bone1.7000e-615.0000000.300000

Bony endplate1.5000e-60.0238000.400000

Vertebral1.4000e-63.5000000.250000

Ligaments1.0000e-60.0

Annulus fibrosus fibres1.0000e-60.0233750.3500000

Nucleus pulposus1.0200e-60.00100000.4999000