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TLIF at the L4/5 level (70-year-old woman with degenerative spondylolisthesis).
(a) XP at preoperation: L4/5 level degenerative spondylolisthesis, Mayerding grade I.
(b) CT and XP immediately postoperation: The cage was placed in the anterior region, and adequate disc height and local lordosis were obtained.
(c) CT and XP at 6 months postoperation: Bone union with sufficient postoperative maintenance was obtained.
