Table 1 Material properties
Component | Young’s modulus (MPa) | Poisson ratio | Cross-sectional area (mm2) |
|---|---|---|---|
Cortical bone | 12,000 | 0.3 | Â |
Cancellous bone | 100 | 0.2 | Â |
Posterior bone | 3500 | 0.25 | Â |
Endplate | 3000 | 0.25 | Â |
Articular cartilage | 25 | 0.4 | Â |
Titanium alloy | 110,000 | 0.3 | Â |
Normal Nucleus pulposus | 4.2 | 0.45 | Â |
Normal Annulus fibrosus | 1 | 0.499 | Â |
Mild degeneration Nucleus pulposus | 4.2 | 0.45 | Â |
Mild degeneration Nucleus pulposus | 8.4 | 0.45 | Â |
Anterior longitudinal ligament (ALL) | 20 | 0.3 | 40 |
Posterior longitudinal ligament (PLL) | 20 | 0.3 | 20 |
Ligament flava (LF) | 19.5 | 0.3 | 40 |
Supraspinous ligament (SSL) | 15 | 0.3 | 40 |
Interspinous ligament (ISL) | 12 | 0.3 | 30 |
Intertransverse ligamen (ITL) | 59 | 0.3 | 10 |
Capsular ligament (CL) | 32.9 | 0.3 | 30 |