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Reactive calcium-phosphate-containing poly(ester-co-ether) methacrylate bone adhesives: chemical, mechanical and biological considerations.

机译:含反应性磷酸钙的聚(酯-共-醚)甲基丙烯酸酯骨粘合剂:化学,机械和生物学方面的考虑。

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摘要

A poly(propylene glycol-co-lactide) dimethacrylate adhesive with monocalcium phosphate monohydrate (MCPM)/beta-tricalcium phosphate (beta-TCP) fillers in various levels has been investigated. Water sorption by the photo-polymerized materials catalyzed varying filler conversion to dicalcium phosphate (DCP). Polymer modulus was found to be enhanced upon raising total calcium phosphate content. With greater DCP levels, faster release of phosphate and calcium ions and improved buffering of polymer degradation products were observed. This could reduce the likelihood of pH-catalyzed bulk degradation and localized acid production and thereby may prevent adverse biological responses. Bone-like MG-63 cells were found to attach, spread and have normal morphology on both the polymer and composite surfaces. Moreover, composites implanted into chick embryo femurs became closely apposed to the host tissue and did not appear to induce adverse immunological reaction. The above results suggest that the new composite materials hold promise as clinical effective bone adhesives.
机译:已经研究了具有不同含量的一水合磷酸一钙(MCPM)/磷酸三钙(β-TCP)的聚丙二醇-丙交酯二甲基丙烯酸酯粘合剂。光聚合材料对水的吸附催化了填料转化为磷酸二钙(DCP)的变化。发现当提高总磷酸钙含量时,聚合物模量增加。随着DCP含量的增加,观察到磷酸盐和钙离子的释放速度加快,聚合物降解产物的缓冲性得到改善。这可以减少pH催化的整体降解和局部产酸的可能性,从而可以防止不良的生物学反应。发现骨骼状MG-63细胞在聚合物和复合材料表面均附着,扩散并具有正常形态。此外,植入鸡胚股骨的复合材料与宿主组织紧密贴合,似乎没有引起不良的免疫反应。以上结果表明,这种新型复合材料有望成为临床上有效的骨粘合剂。

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