Fig. 3From: Biomechanical differences between two different shapes of oblique lumbar interbody fusion cages on whether to add posterior internal fixation system: a finite element analysisFour OLIF surgical models: A1. Stand-alone OLIF with a kidney-shaped Cage, B1. Stand-alone OLIF with a straight Cage, A2. OLIF with a kidney-shaped Cage + BPSF, B2. Stand-alone OLIF with a straight Cage + BPSFBack to article page