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Biomimetic Approach for Strontium-Coataining Ca-P Bioceramics with Enhanced Biological Activity

机译:具有增强生物活性的含锶的Ca-P生物陶瓷的仿生方法

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摘要

Trace elements are an interesting alternative to growth factors in order to favour bone formation and among them, strontium has been shown to improve bone formation in osteoporotic patients. The location of strontium in bone varies with age and the type of bone tissues. High strontium uptakes were always found to be associated with recent mineral formations rich in labile non-apatitic environments. Synthetic poorly crystalline apatites (PCA) with similar properties were prepared. The uptake of Sr~(2+) ions depends on the maturation stage of the crystals. Freshly precipitated synthetic apatites participated more efficiently in exchange. Most Sr~(2+) ions could be easily released, like in bone mineral crystals, but a small fraction was irreversibly bound. PCA can be used as an ion reservoir for labile strontium ions with potential biological activity.
机译:为了促进骨形成,微量元素是生长因子的有趣替代物,其中锶已显示出可改善骨质疏松症患者的骨形成。锶在骨骼中的位置随年龄和骨骼组织类型而变化。始终发现高锶吸收与最近在不稳定的非绝热环境中富集的矿物形成有关。制备了具有相似性质的合成的微晶磷灰石(PCA)。 Sr〜(2+)离子的吸收取决于晶体的成熟阶段。新鲜沉淀的合成磷灰石可以更有效地参与交换。大多数Sr〜(2+)离子很容易释放,就像在骨骼矿物晶体中一样,但是一小部分被不可逆地结合。 PCA可用作具有潜在生物活性的不稳定锶离子的离子库。

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