Related Experiment Video
Updated: Jan 31, 2026
11:30
Multilevel Oblique Lumbar Interbody Fusion in Degenerative Lumbar Disc Disease with Instability
Published on: July 25, 2025
1.2K
Fusion Construct Settling Down After Deformity Correction for Degenerative Sagittal Imbalance.
Chang Ju Hwang1, Sang Yun Seok2, Young Tak Yu3
1Department of Orthopaedic Surgery, Seoul Asan Medical Center, Ulsan University School of Medicine, Seoul, South Korea.
Neurosurgery
|January 30, 2026
Summary
Approximately 30% of patients with degenerative sagittal imbalance lose lumbar lordosis within 3 months after surgery. Posterior column osteotomy increases the risk of this lordosis reduction following deformity correction.
Area of Science:
- Spine surgery
- Orthopedic surgery
- Deformity correction
Background:
- Lateral lumbar interbody fusion is used to restore lordosis in degenerative sagittal imbalance (DSI).
- Loss of lordosis can occur postoperatively, impacting surgical outcomes.
- Factors contributing to this lordosis reduction require identification.
Purpose of the Study:
- To assess lumbar lordosis changes within the fusion construct during follow-up.
- To identify factors associated with lumbar lordosis reduction after DSI deformity correction.
Main Methods:
- Retrospective analysis of 124 patients with DSI and >2 years follow-up.
- Stratification into lordosis maintenance (n=86) and loss (n=38) groups based on a ≥5° lordosis reduction.
- Evaluation of demographic, radiological, and surgical factors influencing lordosis reduction.
Main Results:
- Lordosis reduction averaged 9.79° in the loss group vs. 1.42° in the maintenance group (P < .001).
- Most lordosis loss occurred within 3 months post-surgery.
- Posterior column osteotomy was significantly associated with lordosis loss (aOR=3.524, P=.020).
Conclusions:
- Around 30% of DSI patients experience fusion construct settling within 3 months post-operation.
- Endplate injury and cage subsidence did not significantly differ between groups.
- Posterior column osteotomy is a key factor linked to increased lordosis reduction.
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