| OBJECTIVE:This study aimed to compare pre-postoperatively radiologic outcomes of the transforanminal lumbar interbody fusion (TLIF) in stable patients with a lower lumbar degenerative disease.METHODS:67patients with lower lumbar degenerative disease who had TLIF with single cage fusion in our department were retrospectively evaluated. They were divided into2groups according to segments of L4/5and L5/S1.Measure disc space height of front edge and back edge as well as right and left edge and describe position of cage, measure Cobb’s angle in both surgery and adjacent segments. Measure the index of lumbar spinal curvature for all patients.RESULTS:in L4/5group, postoperative disc space is significantly higher than the preoperative (P<0.05) while right and left height of disc space have no significantly difference. Sagittal and coronal Cobb’s angles haven’t changed postoperatively. Postoperative Cobb’s angle of upper adjacent segment is not significantly less than the preoperative while disc space appears a beloid shape with no statistical difference. Disc space and Cobb’s angle of Lower adjacent have no change. In L5/S1group, postoperative disc space height is higher but without significant difference while sagittal and coronal Cobb’s angles have no statistical difference. Comparing right and left height of disc space has no significantly difference. Disc space and Cobb’s angle of upper adjacent segment have no significant difference. The position of the cage doesn’t influence the disc space height and coronal balance. Index of lumbar spinal curvature is significantly enlarge in both L4/5and L5/S1groups (P<0.05)CONCLUSIONS:TLIF with single cage fusion is safe and reliable for stable patients with a lower lumbar degenerative disease. The surgery methods can restore spine curvature without inducing sagittal or cornoal unbalance of adjacent disc space even in the patients who have risk of adjacent segment disease(ASD). |
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