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A new multilayered membrane for tissue engineering of oral hard- and soft tissue by means of melt electrospinning writing and film casting - An in vitro study.

Membranes that form a mechanical barrier not only for cells but also for the bacterial flora of the oral cavity may be helpful in infection-free wound healing for guided tissue regeneration (GTR) applications in the field of oral- and maxillofacial surgery. Controlled wound healing without interference from bacterial contamination appears to be achievable in combination with surface scaffolds for bone- and soft tissue regeneration. As this has not yet been realized, we developed multilayered membranes in this study consisting of specific surface scaffolds for bone- and mucosal regeneration as well as bacteria-tight core membranes. These membranes were evaluated in terms of cell growth of osteoblast- (MG63), keratinocyte- (HaCaT), and fibroblast (L929) cell lines. Scaffolds were fabricated via melt electrospinning writing (MEW), while the core membrane was produced via film casting. All constructs were made of medical-grade poly(ε-caprolactone) (PCL). The bacteria-tightness was tested via a bacterial transmigration-assay. PCL scaffolds and core membranes alone demonstrated good cytocompatibility for all cell lines, which was even enhanced by fusing both components together. The core membrane displayed complete bacteria-tightness over two weeks. These bacteria-tight, individually-designed membranes from medical-grade PCL represent a high-potential, clinically oriented method of GTR in the field of oral- and maxillofacial surgery.

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