Finite element analysis of a novel modular support system for lumbar reconstruction following vertebral column resection

Figure 1 Finite element analysis models used in the present study. A: ASTM-based polyethylene block construct models; B: Vertebra-based lumbar reconstruction models. In each panel, the conventional mesh cage construct is shown on the left and the vertebral column resection modular support system construct is shown on the right.

Figure 2  Schematic illustration of the vertebral column resection modular support system.

Figure 3 Boundary and loading conditions for the ASTM F1717-adapted construct models under compressive and tensile loading. A: Conventional mesh cage construct; B: Vertebral column resection modular support system construct. VCR-MSS: Vertebral column resection modular support system.

Figure 4 Boundary and loading conditions for the vertebra-based lumbar reconstruction models under flexion and extension loading. A: Conventional mesh cage construct; B: Vertebral column resection modular support system construct. VCR-MSS: Vertebral column resection modular support system.

Figure 5 ASTM-adapted polyethylene compressive model comparing the conventional mesh cage construct and the vertebral column resection modular support system construct, showing von Mises stress and total deformation under compressive loading. VCR-MSS: Vertebral column resection modular support system.

Figure 6 ASTM-adapted polyethylene distraction model comparing the conventional mesh cage construct and the vertebral column resection modular support system construct, showing von Mises stress and total deformation under distraction loading. VCR-MSS: Vertebral column resection modular support system.

Figure 7 Vertebra-based finite element analysis comparison of the conventional mesh cage and vertebral column resection modular support system constructs under physiological flexion loading, showing von Mises stress and total deformation. VCR-MSS: Vertebral column resection modular support system.

Figure 8 Vertebra-based finite element analysis comparison of the conventional mesh cage and vertebral column resection modular support system constructs under physiological extension loading, showing von Mises stress and total deformation. VCR-MSS: Vertebral column resection modular support system.