Fig. 3
Schematic diagram of different directional loads applied on the QCT-FEA models. a and d: QCT-FEA model with VD angle of 0.59 degrees. b and e: QCT-FEA model with VD angle of 5.79 degrees. c and f: QCT-FEA model with VD angle of 11.15 degrees. a, b and c: Loads perpendicular to the upper edge of L1 were applied to the upper edge of L1 with a force of 700 N. d, e and f: Loads perpendicular to the lower edge of L1 were applied to the upper edge of L1 with a force of 700 N. QCT-FEA: quantitative computed tomography-based finite element analysis. VD angle: vertebral deformity angle. L1: 1st lumbar vertebral body