Surgical Repair of Annulus Defect with Biomimetic Multilamellar Nano/microfibrous Scaffold in a Porcine Model

Ran Kang, Haisheng Li, Xizhi Peng, Steffen Ringgaard, Anette Baatrup, Kresten Rickers, Ming Sun, Dang Quang Svend Le, Miao Wang, Lin Xie, Menglin Chen, Cody Bünger

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Annulus defect is associated with reherniation and disc degeneration after discectomy; currently there is no effective treatment that addresses this problem. The annulus is a hierarchical lamellar structure, where each lamella consists of aligned collagen fibres, which are parallel and tilted at 30° to the spinal axis. In this study, a biomimetic biodegradable scaffold consisting of multilamellar nano/microfibres, sharing nanotopography and microporosity similar to the native lamellar structure, was assessed in a porcine model, aided by sealing with fascia and medical glue and subsequent suture fixation. After 6- and 12-week observation, we found that this treatment restored nucleus volume and slowed down disc degeneration, as indicated by magnetic resonance imaging of T1/T2-weighted, T2-mapping, T1-ρ imaging. Histological analysis showed aligned collagen fibres organized in the scaffold and integrated with surrounding native annulus tissue. The autologous bone marrow concentrate-seeded scaffolds showed slightly earlier collagen fibre formation at 6 weeks. This novel treatment could efficiently close the annulus defect with newly formed, organized and integrated collagen fibres in a porcine model.

TidsskriftJournal of Tissue Engineering and Regenerative Medicine
Sider (fra-til)164-174
Antal sider11
StatusUdgivet - jan. 2018


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