Table 1 Material properties of finite element analysis models
Component | Young Modulus(MPa) | Poisson ratio | Cross-sectional area(mm2) |
|---|---|---|---|
Cortical bone | 8040 | 0.30 | -- |
cancellous bone | 37 | 0.20 | -- |
Bony end-plate | 670 | 0.40 | -- |
Posterior structure | 2345 | 0.25 | -- |
Fibrous annulus | 4.2 | 0.45 | -- |
Nucleus pulposus | 0.2 | 0.49 | -- |
Annulus matrix | 500 | 0.30 | -- |
Cement | 3000 | 0.40 | -- |
Articular facet cartilage | 10 | 0.40 | -- |
Anterior longitudinal ligament | 20 | 0.30 | 57 |
Posterior longitudinal ligament | 70 | 0.30 | 24 |
Supraspinous ligament | 28 | 0.30 | 8 |
Interspinous ligament | 28 | 0.30 | 28 |
Capsular ligament | 20 | 0.30 | 48 |
Ligamentum flavum | 50 | 0.30 | 49 |
Intertransverse ligament | 50 | 0.30 | 9 |