ArticleEuropean spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society2025
Protection of the ligamentum flavum reduces epidural fibrosis formation in endoscopic lumbar discectomy.
Article in European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Early MRI-Detected Interspinous Ligament Region Edema Is Associated With Delayed Pain Recovery and Persistent Low Back Pain After Unilateral Biportal Endoscopic Surgery.Pain and therapy · 2026Article
- Ligamentum flavum preservation via unilateral biportal endoscopy in lumbar discectomy: a "Door-Opening" technique and its clinical outcomes.European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society · 2026Article
- How I do it: The K-point approach in unilateral biportal endoscopic lumbar discectomy: a bone and ligamentum flavum preserving technique.Acta neurochirurgica · 2026Article
- Letter to the Editor concerning "Protection of the ligamentum flavum reduces epidural fibrosis formation in endoscopic lumbar discectomy" by Merter et al. (European Spine Journal).European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society · 2026Article
- Efficacy analysis of ligamentum flavum preservation technique under unilateral biportal endoscopic in the treatment of lumbar disc herniation.Frontiers in surgery · 2025Article
- Comparison of unilateral biportal endoscopic lumbar fusion and modified minimally invasive tubular lumbar fusion for lumbar disc herniation: a two-year retrospective study.Frontiers in neurology · 2025Article
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Authors and funding
7 authors.
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Abstract
purposeLumbar disc herniation is a prevalent condition that leads to lower back pain, weakness, and claudication. While microdiscectomy has long been the gold standard for surgical treatment, advances in technology have introduced endoscopic techniques, such as Unilateral Biportal Endoscopic spine surgery. Despite these advances, epidural fibrosis remains a common complication that, potentially hinders recovery and complicating revision surgeries. This study aimed to compare the extent of epidural fibrosis between microdiscectomy and UBE surgery with preserved flavum and flavectomy.
methodsThis retrospective study included 47 patients diagnosed with lumbar disc herniation who underwent surgery between August 2020 and July 2022 at two tertiary university hospitals. The patients underwent endoscopic surgery with flavum preservation (n = 16), flavum excision (n = 16), lumbar microdiscectomy with flavectomy (n = 15). Preoperative and postoperative imaging, including X-rays, computed tomography, and magnetic resonance imaging were performed. Functional scores (Visual Analog Scale, Japanese Orthopedic Association score, and Oswestry Disability Index were assessed. Postoperative magnetic resonance imaging was conducted at three months to evaluate epidural fibrosis.
resultsThe rate of epidural fibrosis was significantly lower in the flavum sparing UBE (0.18 ± 0.17) compared to the flavum non-sparring UBE (0.38 ± 0.19) and the flavum non-sparring microdiscectomy (0.47 ± 0.18) (p < 0.001). Functional scores significantly improved postoperatively in all groups, with significant differences noted in JOA, Oswestry, and VAS scores (p < 0.01). Early functional score differences between the groups were found to be significant in favor of UBE, particularly in the flavum-sparing group.
conclusionThe preservation of flavum during UBE surgery leads to significantly less epidural fibrosis compared to both flavum non-sparring UBE and microdiscectomy. Functional improvements were similar across groups, but flavum sparring UBE surgery demonstrated better early postoperative outcomes. The results suggest that preserving flavum during endoscopic spine surgery may reduce epidural fibrosis formation and promote better recovery, supporting the benefits of minimally invasive techniques in lumbar disc herniation surgery.
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