Table 2 Model parameters of various kinds of material
|  | Young’s modulus(MPa) | Poisson’s ratio | Element Type |
|---|---|---|---|
cortical bone | 18,000 | 0.3 | shell element |
trabecular bone | 150 | 0.2 | tetrahedral element |
sacroiliac cartilage | 1000 | 0.3 | hexahedral element |
interpubic disc | 5 | 0.45 | hexahedral element |
screw | 114,000 | 0.3 | hexahedral element |