There is minimal retropulsion of the L2 body not causing any significant compression of the thecal sac. There is minimal prevertebral soft tissue prominence. The bony spinal canal is normal in size and configuration. No significant posterior bulging or herniation of the disc is present. Ninety percent of all spinal fractures are in the thoraco-lumbar region.
Several factors contribute to thoraco-lumbar vulnerability.
Lumbar spinal segments are more mobile than thoracic segments. The mobility is due in part to the changing orientation of the facet joints. The coronal orientation of the facets in thoracic region is more stable then the oblique orientation of the lumbar region. The management and outcome of lumbosacral spine injuries largely depend upon the stability of the spinal column. There are different models to describe the stability following an injury.