Fig 1.
A three-dimensional geometric model of the pelvic spine.
Fig 2.
Simulated longitudinal fracture of the sacrum.
Table 1.
Lumbar spine material parameters.
Table 2.
Pelvic ligament parameters.
Fig 3.
Pelvic fracture finite element model constructed, Pelvis model mechanics loading (red arrows) and binding constraints (blue arrows).
Fig 4.
Schematic diagrams of four iliolumbar fixation models and their corresponding maximum von Mises stress distributions.
A:.unilateral L4 pedicle screw + unilateral L5 pedicle screw + iliac screw. B: Maximum von Mises stress cloud for the L4L5IS model. C:unilateral L5 pedicle screw + S1 pedicle screw + iliac screw. D: Maximum von Mises stress cloud for the L5S1IS model. E:unilateral L5 pedicle screw + iliac screw. F: Maximum von Mises stress cloud for the L5IS model. G: unilateral S1 pedicle screw + iliac screw. H: Maximum von Mises stress cloud for the S1IS model.
Table 3.
Vertical displacement of the upper surface of the sacrum.
Table 4.
Sacral vertical displacement normality test.
Table 5.
Sacral vertical displacement Homogeneity of Variances test.
Table 6.
ANOVA test.
Table 7.
LSD Multiple Comparisons.
Fig 5.
Relative displacement values for each model group.