Abstract：
BACKGROUND: Endoscopically assisted screw fixation with lumbar interbody fusion is rarely performed. We succeeded in implanting the cortical bone trajectory (CBT) screws under the guidance of unilateral biportal endoscopy (UBE).
METHODS: We attempted endoscopically assisted screw fixation in a patient with degenerative spondylolisthesis. Through a third portal, ipsilateral CBT screws were implanted without complications.
CONCLUSIONS: We successfully performed unilateral biportal endoscopic lumbar interbody fusion (ULIF) with CBT and reversed CBT screws. Compared with percutaneous pedicle screw (PPS) placement, this procedure is a minimally invasive, endoscopic alternative that allows precise screw placement.
METHODS: We attempted endoscopically assisted screw fixation in a patient with degenerative spondylolisthesis. Through a third portal, ipsilateral CBT screws were implanted without complications.
CONCLUSIONS: We successfully performed unilateral biportal endoscopic lumbar interbody fusion (ULIF) with CBT and reversed CBT screws. Compared with percutaneous pedicle screw (PPS) placement, this procedure is a minimally invasive, endoscopic alternative that allows precise screw placement.
摘要：
背景：很少进行内窥镜辅助螺钉固定与腰椎椎间融合术。我们在单侧双向内窥镜（UBE）的指导下成功植入了皮质骨轨迹（CBT）螺钉。
方法：我们尝试对1例退行性腰椎滑脱患者进行内窥镜辅助螺钉内固定。通过第三个门户，同侧CBT螺钉植入无并发症。
结论：我们成功地进行了单侧双门镜下腰椎椎间融合术（ULIF）与CBT和反向CBT螺钉。与经皮椎弓根螺钉(PPS)置入相比,这个手术是微创的，内窥镜替代，允许精确的螺钉放置。
方法：我们尝试对1例退行性腰椎滑脱患者进行内窥镜辅助螺钉内固定。通过第三个门户，同侧CBT螺钉植入无并发症。
结论：我们成功地进行了单侧双门镜下腰椎椎间融合术（ULIF）与CBT和反向CBT螺钉。与经皮椎弓根螺钉(PPS)置入相比,这个手术是微创的，内窥镜替代，允许精确的螺钉放置。
