Global Sagittal Alignment and Clinical Outcomes after 1–3 Short-Segment Lumbar Fusion in Degenerative Spinal Diseases
- Author:
Yung-Hun YOUN
1
;
Kyu-Jung CHO
;
Yeop NA
;
Jeong-Seok KIM
Author Information
- Publication Type:Clinical Study
- From:Asian Spine Journal 2022;16(4):551-559
- CountryRepublic of Korea
- Language:English
-
Abstract:
Methods:A total of 69 patients with transforaminal lumbar interbody fusion (TLIF) for degenerative spinal disease were evaluated with a minimum 2-year follow-up. All patients underwent TLIF with hyper-lordotic angle cages to achieve higher LL. Radiological spino-pelvic parameters including sagittal vertical axis (SVA) and clinical outcomes using the Oswestry Disability Index (ODI) and Numeric Rating Scale (NRS) were evaluated.
Results:The average LL was 35.8°±9.9° before surgery, 42.3°±9.3° 1 year after surgery, and 40.3°±10.2° 2 years after surgery (p <0.01). The average SVA was 43.1±6.2 mm before surgery, 21.2±4.9 mm 1 year after surgery, and 34.0±4.7 mm 2 years after surgery (p <0.01). The average LL and SVA improved in two- or three-segment fusion, but not in one-segment fusion. The correlation between ΔLL and ΔSVA was significant in all segment fusions. The correlation between ΔLL and ΔSVA was more significant at the L4–5 and L5–S1 segments than at L3–4. ODI was significantly correlated with SVA (p <0.05). NRS showed no correlation with the radiological parameters.
Conclusions:Two- or three-segment lumbar fusion using hyper-lordotic angle cages improved LL and SVA. A significant correlation between the correction of LL and SVA was found. Higher correction of LL using hyper-lordotic angle cages is thus recommended in short-segment lumbar fusion, since postoperative improvements of SVA significantly affect clinical outcomes.
