Fig. 1From: Traditional and cortical trajectory screws of static and dynamic lumbar fixation- a finite element studyFour highly nonlinear lumbosacral models used in this study. TT static fixation(a). TT dynamic fixation(b). CBT static fixation(c). CBT dynamic fixation(d). The adjacent (L3-L4) and fixed (L4-L5) segments are chosen as the representatives of the tissue responsesBack to article page