Fig. 1From: Biomechanical evaluation of modified and traditional cortical bone trajectory technique on adjacent segment degeneration in transforaminal lumbar interbody fusion—finite element analysisFE models of L1-S1 lumbar spine with TLIF at the L4-L5 segment with three different fixation techniques. A TT at L4 and L5 (TT-TT) [16]; B CBT at L4 and L5 (CBT-CBT) [16]; C MCBT at L4 and L5 (MCBT-MCBT) [20]Back to article page