The objectives of this work are twofold. Firstly, while most work on electrospinning islimited to the development of only functional materials, a structural application ofelectrospun nanofibers is explored. Secondly, a drug-loaded tissue suture is fabricated andits various properties are characterized. Braided drug-loaded nanofiber sutures are obtainedby combining an electrospinning process with a braiding technique followed by a coatingprocedure. Two different electrospinning techniques, i.e. blend and coaxial electrospinning,to incorporate a model drug cefotaxime sodium (CFX-Na) into poly(L-lactic acid) (PLLA)nanofibers have been applied and compared with each other. Properties of the braideddrug-loaded sutures are characterized through a variety of methods including SEM,TEM and tensile testing. The results show that the nanofibers had a preferablemicromorphology. The drug was incorporated into the polymer nanofibers homogeneously,with no cross-linking. The nanofibers maintained their fibrous structures. Anin vitro release study indicates that the drug-loaded nanofibers fabricated byblend electrospinning and coaxial electrospinning had a different drug releasebehavior. An inhibition zone experiment shows that both sutures obtained from thenanofibers of the different electrospinning techniques had favorable antibacterialproperties. The drug-loaded sutures had preferable histological compatibilityperformance compared with commercial silk sutures in an in vivo comparative study.
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