ArticleEuropean spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society2026
Effect of single-nanofibrous materials for epidural scar prevention after laminectomy: An experimental study in an animal model.
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, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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11 authors.
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Abstract
purposeTo evaluate whether nanofibrous anti-adhesion membranes reduce epidural scar formation after lumbar laminectomy in a rabbit two-level model, comparing a non-degradable PVDF membrane with a degradable PCL membrane.
methodsAdult rabbits underwent L1 laminectomy (internal control) and L5 laminectomy with membrane implantation (PVDF or PCL). The primary endpoint was epidural scar width (mean and maximum) on histology in paired within-animal comparisons (L5 vs. L1). For PVDF, we used a one-sided paired Wilcoxon test (α = 0.05); effect sizes are reported as Hodges–Lehmann median paired difference with 95% CI. The PCL group (small n) was analysed descriptively.
resultsPVDF implantation yielded consistently narrower scars than the paired internal control, reaching statistical significance (exact p = 0.016). The magnitude of reduction, although directionally favourable, did not meet the prespecified threshold for clinical relevance (≥ 90% narrowing). In the PCL group the material was largely resorbed by 12 weeks and was frequently associated with adhesive tissue bridges and neovascularization; due to the limited sample size, these findings are descriptive.
conclusionsA non-degradable PVDF nanofibrous membrane significantly reduced epidural scar width in a paired rabbit model but fell short of the predefined clinically meaningful reduction. Degradable PCL demonstrated rapid resorption with unfavourable adhesion morphology. These data support further optimization of membrane design and durability before clinical translation.
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