Outcomes of posterolateral versus BAK titanium cage interbody lumbar fusion in injured workers: a retrospective cohort study.

Lumbar fusion has been criticized for variable patient outcomes, though little is known regarding how outcomes vary across procedures. We examined outcomes of posterolateral versus BAK interbody lumbar fusion in workers' compensation cases. A medical record review and a follow-up survey were completed.

Annular bulge contours from an axial photogrammetric method.

OBJECTIVE: To determine the characteristic contour of annular bulge in the lumbar spine under compression using a non-contacting technique. DESIGN: Transverse bulge of the annulus in lumbar motion segments was measured from photographs taken through an acrylic load plate. BACKGROUND: Annular bulge is considered a potential factor in nerve root impingement.