Research Article

Biomechanical Investigation of the Posterior Pedicle Screw Fixation System at Level L4-L5 Lumbar Segment with Traditional and Cortical Trajectories: A Finite Element Study

Figure 5

Mean values and minimum-maximum ranges of the ROMs of posterior fixations at the fixation segment in four implanted models. The maximum ROM was found for the TT-TT group, followed by the CBT-CBT, CBT-TT, and TT-CBT groups.