Table 1 The material properties of the finite element model
Component name | Young’s modulus (Mpa) | Poisson ratio, y | Element type |
|---|---|---|---|
Cortical bone | 12,000 | 0.3 | tetrahedral |
Cancellous bone (normal) | 345 | 0.2 | tetrahedral |
Cancellous bone (osteoporosis) | 70 | 0.2 | tetrahedral |
Cement (Calcium sulfate) | 147 | 0.3 | tetrahedral |
Posterior element | 3500 | 0.25 | tetrahedral |
Endplate | 12,000 | 0.3 | tetrahedral |
Disc-annulus | 4.2 | 0.45 | Prism |
Disc-nucleus | 6 | 0.499 | Prism |
Annuls fiber | 500 | 0.3 | tri |
Rigid body | 10,000,000 | 0.4 | tetrahedral |
Titanium | 110,000 | 0.3 | tetrahedral |