Table 2 Material parameters of cervical components and implants
Material | Elastic modulus (MPa) | Poisson ratio | Element type | Cross-sectional area (mm2) |
|---|---|---|---|---|
Vertebra | ||||
Cortical bone | 12,000 | 0.3 | C3D4 | – |
Cancellous bone | 100 | 0.2 | C3D4 | – |
Endplate | 500 | 0.4 | S3 | – |
Cartilage | 10 | 0.4 | C3D4 | – |
Posterior structure | 3500 | 0.25 | C3D4 | – |
Intervertebral disc | ||||
Annulus fibre | 450 | 0.45 | T3D2 | – |
Annulus ground Substance | Hyperelasitc Mooney-Rivlin |  | C3D6 | – |
|  | C10 = 0.56 |  |  |  |
|  | C01 = 0.14 |  |  |  |
Nucleus pulposus | Hyperelasitc Mooney-Rivlin |  | C3D6 | – |
|  | C10 = 0.56 |  |  |  |
|  | C01 = 0.14 |  |  |  |
Ligaments | ||||
ALL | 30 | 0.4 | T3D2 | 6.1 |
PLL | 20 | 0.4 | T3D2 | 5.4 |
LF | 10 | 0.4 | T3D2 | 50.1 |
IL | 10 | 0.4 | T3D2 | 13.1 |
SL | 10 | 0.4 | T3D2 | 13.1 |
CL | 10 | 0.4 | T3D2 | 46.6 |
NuVasive® Helix ACP | ||||
Ti6Al4V | 114.000 | 0.35 | C3D4 | – |
CoRoent® Contour | ||||
PEEK | 3400 | 0.4 | C3D4 | – |
Synthes® Prodisc-C | ||||
End plates (cobalt chromium) | 210,000 | 0.3 | C3D4 | – |
Core (polyethylene) | 800 | 0.3 | C3D4 | – |