Fig. 9From: Hybrid pedicle screw and modified cortical bone trajectory technique in transforaminal lumbar interbody fusion at L4-L5 segment: finite element analysisStress nephograms over the rod in four different fixation models. A the BPS-BPS group. B the BMCS-BMCS group. C the BPS-BMCS group. and D the BMCS-BPS groupBack to article page