Affiliation:
1. Tokai University School of Medicine
2. Tokai University School of Medicine Oiso Hospital
Abstract
Abstract
Background: This study aimed to elucidate the effect of lumbosacral fusion on joint space narrowing of the hip.
Methods: We retrospectively studied 511 hips of 261 patients who had undergone lumbar fusion. Whole-spine X-ray was performed for all the patients before surgery and at the final follow-up. Center edge angle, joint space of the hip, sagittal vertical axis, thoracic kyphosis, lumbar lordosis, pelvic incidence, pelvic tilt, and sacral slope were measured. The number of lumbar fusion levels, inclusion of sacral fusion, follow-up duration, and wear of the hip joint (mm/year) were also recorded. Multi regression analysis was performed to identify the risk factors for joint space narrowing.
Results: Female sex (P=0.04), number of fixed lumbar levels (P=0.002), sacral fusions (P=0.039), and follow-up period (P<0.001) were independent risk factors for joint space narrowing of the hip. The patients who underwent four or more levels of lumbar fusion experienced more rapid wearing of the hip joint space than that experienced by patients with less than three levels of lumbar fusion (P=0.044).
Conclusion: Surgeons should pay attention to joint space narrowing of the hip after performing multiple lumbar fusions or sacral fusion in women.
Publisher
Research Square Platform LLC