European Spine Journal · IF 2.8 · July 30, 2026 · LoE II
“The protective buffer”: Adequate L4-S1 lordosis restoration reduces the symptomatic conversion of radiographic ASD and long-term revision rates — A 5-year multicenter cohort study
Chen Wang, Zhifeng Dong, Jing Jia, GuangYi Zhang, Xirong Fan, Kai Zhang, Wen Xue, Qilong Wang, Zeng Ping Wang, Shuanhu Lei — Gansu University of Traditional Chinese Medicine
This retrospective, three-center cohort followed 232 patients who had L4-S1 TLIF for degenerative lumbar disease, comparing those whose surgeons restored 'adequate' segmental lordosis (35-45 degrees) versus those who did not, over a minimum of 5 years. Patients with inadequate lordosis restoration had much higher rates of pelvic retroversion, symptomatic adjacent segment disease, implant failure, and reoperation (26.4% revision vs 2.4% in the adequate group, P<0.001), along with worse pain and disability scores at final follow-up.
AI summary · from the full text · reviewed by Pukhraj Gaheer, Medical Student, Queen's University before publishing
Why it mattersIt suggests that getting L4-S1 lordosis into a specific numeric target at the index TLIF may be one of the biggest levers surgeons have to prevent costly, disabling revision surgery down the road.
Conclusion strengthPotentially practice-changing
Multivariable adjustment and how many patients this affects, offset by no correction for multiple comparisons.
Presenting this at rounds? Start here
- ?If a 35-45 degree L4-S1 lordosis target were adopted as a routine intraoperative checkpoint, how should surgeons balance achieving it against added operative time, blood loss, or neural risk from more aggressive releases?
- ?For patients in whom anatomic constraints (rigid facets, sclerotic endplates) prevent reaching this lordosis target with TLIF, should surgeons instead default to an anterior approach (ALIF/OLIF) to achieve better sagittal correction?