Comparison of Surgical Outcomes between Cortical Bone Trajectory and Conventional Pedicle Screw Technique for Lumbar Degenerative Spondylolisthesis

Abstract

his systematic review to compare the surgical outcomes between the cortical bone trajectory (CBT) and traditional trajectory (TT) technique. There is no widely accepted consensus regarding comparison of clinical outcomes and complications between the CBT and TT technique. Generally, indications for CBT and TT are similar between most studies, especially for common pathologies resulting in spondylolisthesis. The TT technique to lumbosacral spine surgery requires extensive lateral spinal dissection for screw placement. On the other hand, the CBT approach requires less soft tissue exposure as screws are placed medially to laterally with a starting point at the junction between the lateral pars interarticularis and superior articular process (1 mm inferior to the inferior border of the transverse process, which was projected to the 5 o’clock orientation in the left pedicle and the 7 o’clock orientation in the right pedicle). Recent trends have demonstrated a transition towards minimally invasive surgical approaches over traditional invasive approaches (22). Since CBT requires less dissection of the spine and smaller incisions than TT, it is considered to be the more minimally invasive of the two approaches. Figure 15