|
Material properties specified in the finite element models |
||||
| Material |
Elastic modulus (MPa) |
Poisson ratio |
Total element number |
Cross section area (mm2) |
|
|
||||
| Cancellous bone |
100 |
0.2 |
18185 |
- |
| Cortical bone |
12000 |
0.3 |
6512 |
- |
| Endplate |
1000 |
0.4 |
2361 |
- |
| Nucleus pulposus |
10 |
0.4 |
1281 |
|
| Posterior elements |
3500 |
0.25 |
16587 |
- |
| Pedicle screw/cage |
110000 |
0.3 |
6388 |
- |
| Annulus fibre layers |
||||
| Outermost |
550 |
0.3 |
- |
0.7 |
| Second |
495 |
0.3 |
- |
0.63 |
| Third |
440 |
0.3 |
- |
0.55 |
| Fourth |
420 |
0.3 |
- |
0.49 |
| Fifth |
385 |
0.3 |
- |
0.41 |
| Innermost |
360 |
0.3 |
- |
0.30 |
| Ligaments |
||||
| Lig. long. posterius |
70 |
- |
- |
20 |
| Lig. flava |
50 |
- |
- |
60 |
| Lig. intertransversia |
50 |
- |
- |
10 |
| Lig. interspinalia |
28 |
- |
- |
35.5 |
| Lig. supraspinalia |
28 |
- |
- |
35.5 |
| Lig. capsulae |
20 |
- |
- |
40 |
Chen et al. BMC Musculoskeletal Disorders 2008 9:88 doi:10.1186/1471-2474-9-88 |
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