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Posterior Implant Properties.
| Young’s modulus | 110 GPa |
| Poisson’s ratio | 0.32 |
| Density | 4.4 g/cm3 |
| Screw cross-section diameter | 3.5 mm |
| Rod cross-section diameter | 3.5 mm |
| Total screw length | 35 mm |
| Average distance from screw exit point to rod fixation | 7.0 mm |
