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CBT screw and posterior lumbar interbody fusion (PLIF). a: Preoperative AP X-ray. b: Postoperative AP X-ray showing interbody fusion cages of L4/5 and CBT screw fixation. c: Preoperative reconstruction sagittal CT demonstrating L4/5 spondylolisthesis. d: Postoperative reconstruction sagittal CT demonstrating L4/5 interbody fusion and mild reduction of spondylolisthesis. AP: anterior-posterior, CBT: cortical bone trajectory, CT: computed tomography.
