From the case:
Denis three column concept in spinal fracture
{"current_user":null,"step_through_annotations":true,"access":{"can_edit":false,"can_download":true,"can_toggle_annotations":true,"can_feature":false,"can_examine_pipeline_reports":false,"can_pin":false},"extraPropsURL":"/studies/33582/annotated_viewer_json?c=1669281316\u0026lang=us"}



The three columns defined in the Denis description of spinal fracture stability are highlighted above.