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Mechanical and biological characterization of a composite annulus fibrosus repair strategy in an endplate delamination model

机译:底板分层模型复合环纤维修复策略的机械和生物学特征

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摘要

This study compares the mechanical response of the commonly used annulus fibrosus (AF) puncture injury model of the intervertebral disc (IVD) and a newly proposed AF failure at the endplate junction (delamination) on ex vivo bovine IVDs. Biocompatibility and mechanics of a newly developed repair strategy comprising of electrospun polycaprolactone (PCL) scaffold and fibrin‐genipin (FibGen) adhesive was tested on the delamination model. The study found no significant difference in the mechanical response to compressive loading between the two models. Primary goals of the repair strategy to create a tight seal on the damage area and restore mechanical properties, while showing minimal cytotoxicity, were broadly achieved. Postrepair, the IVDs showed a significant restoration of mechanical properties compared to the injured samples for the delamination model. The FibGen glue showed a limited toxicity in the AF and produced a resilient and mechanically stable seal on the damaged area.
机译:该研究比较了椎间盘(IVD)的常用环纤维(AF)穿刺损伤模型的机械响应,并在离体牛IVDS上的端板结(分层)的新提出的AF失效。在分层模型上测试了包含ElectromatOM多己内酯(PCL)支架(PCL)支架和纤维蛋白 - Genipin(纤维蛋白)粘合剂的新开发的修复策略的生物相容性和机制。该研究发现,两种模型之间的压缩负载的机械响应没有显着差异。大广泛地实现了在损伤区域和恢复机械性能上产生紧密密封的修复策略的主要目标,同时显示出最小的细胞毒性。 Postrepair,IVDS与用于分层模型的受伤样品相比,术语恢复了力学性能。纤维胶在AF中显示出有限的毒性,并在受损区域上产生弹性和机械稳定的密封。

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