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

Figure 3

(a) Intersegmental motion behavior was analyzed experimentally on the synthetic model modified from ISO 12189 standards under a “load-controlled” mode. Infrared light emitting diodes were attached to each vertebral body with two landmarkers installed for measuring the 3-dimensional coordinates in (b) DTO and (c) Isobar devices. Initial 2 mm precompression on the assembled construct guaranteed stability and (d) increased axial vertical load of 500 N for overall construct; then, 10 Nm bending moment of flexion or lateral bending was applied to measure (e) interpedicular travel vector ().

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