Table 2 Material properties used in the finite element models
Materials | Elastic modulus/MPa | Poisson's ratio | Cross-sectional area (mm2) |
|---|---|---|---|
Titanium plate, screw | 105,000 | 0.342 | – |
Bone cortex | 12,000 | 0.3 | – |
Cancellous bone | 450 | 0.2 | – |
Articular cartilage | 10.4 | 0.4 | – |
Endplate | 500 | 0.4 | – |
Nucleus pulposus | 1 | 0.49 | – |
Annular fibre | 110 | 0.3 | – |
Annulus fibrosus matrix | 3.4 | 0.4 | 6 |
Anterior longitudinal ligament | 10 | 0.3 | 5 |
Posterior longitudinal ligament | 10 | 0.3 | 46 |
Articular capsule ligament | 10 | 0.3 | 5 |
Ligamentum flavum | 1.5 | 0.3 | 10 |
Interspinous ligament | 1.5 | 0.3 | 5 |
Supraspinous ligament | 1.5 | 0.3 | 5 |
Intertransverse ligament | 1.5 | 0.3 | – |