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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Polyvinylpyrrolidone modified bioactive glass fibers as tissue constructs: In vitro mesenchymal stem cell response
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Polyvinylpyrrolidone modified bioactive glass fibers as tissue constructs: In vitro mesenchymal stem cell response

机译:聚乙烯吡咯烷酮改性的生物活性玻璃纤维作为组织构建体:体外间充质干细胞反应

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摘要

The sol- gel synthesis of a bioactive glass (BAG) sol with the incorporation of polyvinylpyrrolidone and the subsequent spraying of short, discontinuous fibers is reported. The incorporation of the polymer into the BAG sol allowed for increased control of the rheological properties and resulted in a more homogeneous fibrous material when sprayed through an air gun. Reaction kinetics and sol viscosity were monitored and analyzed during synthesis, and fibers were characterized using scanning electron microscopy and thermal analysis. Fibers were sintered at 900 deg C and were examined for in vitro bioactivity in a simulated body fluid solution. The presence of hydroxyapatite crystals is confirmed by examination with scanning electron microscopy, energy dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD). Both the proliferation rate and cell density of rat mesenchymal fem cells cultured on BAG fiber constructs of varying porosities were shown to be dependent upon fiber spacing.
机译:据报道,通过掺入聚乙烯吡咯烷酮并随后喷涂短而不连续的纤维,可以生物合成玻璃(BAG)溶胶的溶胶凝胶。通过将聚合物掺入BAG溶胶中,可以更好地控制流变性能,并在通过气枪喷涂时产生更均质的纤维材料。在合成过程中监测和分析反应动力学和溶胶粘度,并使用扫描电子显微镜和热分析表征纤维。在900摄氏度下烧结纤维,并在模拟体液溶液中检查其体外生物活性。羟基磷灰石晶体的存在通过扫描电子显微镜,能量色散X射线光谱(EDX)和X射线衍射(XRD)的检查得以确认。在不同孔隙度的BAG纤维构造上培养的大鼠间充质fem细胞的增殖速率和细胞密度均取决于纤维间距。

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