Table 5 Comparison of the maximum stress on implants (MPa) in the finite element models
From: Finite element analysis after rod fracture of the spinal hybrid elastic rod system
Implant | Motion | Ns-I | Ns-F |
|---|---|---|---|
Screw | Flexion | 139 | 92.2 |
Extension | 105 | 75.6 | |
Torsion | 211 | 85.5 | |
Lateral bending | 158 | 94.3 | |
PCU shell | Flexion | 4.7 | 16.1 |
Extension | 5.1 | 12.5 | |
Torsion | 17.4 | 13.3 | |
Lateral bending | 6.8 | 19.7 | |
Nitinol stick | Flexion | 44 | 32.1 |
Extension | 39.5 | 21.5 | |
Torsion | 219 | 78 | |
Lateral bending | 127 | 41.2 |