PMC2729237_01
Reconstructed three-dimensional computed tomography demonstrating bilateral anterior facet dislocation with clearly visible sacral articular surfaces (arrows), the fractured tip of the right L5 inferior articular process (arrowhead), and transverse process fractures.
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Computed tomography revealed a bilateral anterior facet dislocation of the fifth lumbar vertebra on the sacrum with a fracture of the right inferior articular process of L5 and fractures of L2 and L3 spinous processes (Figure 1).
Sagittal magnetic resonance imaging showing anterior displacement of L5 on S1 and disruption of the posterior ligamentous complex. (a) T1-weighted images. (b) T2-weighted images.
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MRI showed rupture of the posterior ligamentous complex, but no major disc lesion was found at the level of L5-S1 (Figure 2).
Postoperative anteroposterior (a) and lateral (b) radiographs showing good reduction of L5 anterolisthesis.
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Postoperative radiography revealed good reduction (Figure 3).
Computed tomography 6 months after surgery demonstrating solid L5-S1 circumferential fusion. (a) Axial section at the lumbosacral junction. (b) Coronal section at the middle portion of the L5 vertebral body. (c) Coronal section at the L5-S1 posterior fusion.
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Six months after the surgery, bony fusion of L5-S1 was observed (Figure 4).