Fig. 4From: The biomechanical effect on the adjacent L4/L5 segment of S1 superior facet arthroplasty: a finite element analysis for the male spinea Lumbar motion of L4/L5 segment after S1 superior facet transverse arthroplasty; *p<0.05. b Lumbar motion of L4/L5 segment after S1 superior facet longitudinal arthroplasty; *p<0.05Back to article page