Biomechanical Comparison between Isobar and Dynamic-Transitional Optima (DTO) Hybrid Lumbar Fixators: A Lumbosacral Finite Element and Intersegmental Motion Analysis

Figure 2

(a) A uniaxial material testing system equipped with a custom-made holder was performed under pure compression and distraction of 700 N load displacement. The distance from Isobar device to epoxy resin surface was fixed with four screws on both sides and mounted by universal joint on a - table for calculating stiffness under +700 N loading. (b) Numerical Isobar model was set and validated to reveal (c) reaction force averaged 27% lower in compression and 3% higher in distraction than those of experimental results.

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