Summary of FEA Studies Involving Pedicle Screw- Based Dynamic Stabilization Devices (Currently Available and Used Clinically)
| References | Methods | Parameter(s) | Device |
|---|---|---|---|
| Templier et al., 199822 | 3D geometris FE L3-sacrum model Semirigid / rigid | Load transmission throughout the FSU and the instrumentation following application of a flexion moment | Twinflex |
| Zander et al., 200624 | 3D non linear FE Model of the lumbosacral spine Intact/Dynamic below rigid instrumentation | ROM, intradiscal pressure, facet joints forces and implant stresses In standing, 30° flexion, 20° extension, 10° axial rotation | Fictional device similar to Dynesys |
| Rohlmann et al., 200723 | 3D non linear FE Model of the lumbosacral spine Dynamic/Rigid | ROM, intradiscal pressure, facet joints forces and implant stresses In standing, 30° flexion, 20° extension, 10° axial rotation | Fictional device similar to Dynesys |
| Castellvi et al., 200525 | 3D non linear FE Model of the lumbosacral spine Semirigid/ Rigid | Adjacent level stresses Under flexion (45°), extension and axial loading | ISOBAR TTL |
FE Finite element
FSU Functional Spine Unit
ROM Range of motion