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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Cogrinding significance for calciym carbonate-calcium phosphate mixed cement. II. Effect on cement properties
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Cogrinding significance for calciym carbonate-calcium phosphate mixed cement. II. Effect on cement properties

机译：对于碳酸钙-磷酸钙混合水泥的研磨意义。二。对水泥性能的影响

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摘要

In the present study, we aim to evaluate the contribution of the cogrinding process in controlling calcium car-bonate-dicalcium phosphate dihydrate cement properties. We set a method designed to evaluate phase separation, usually occurring during paste extrusion, which is quantitative, reliable, and discriminating and points out the determining role of cogrinding to limit filter-pressing. We show that solid-phase cogrinding leads to synergistic positive effects on cement injectability, mechanical properties, and radio-opacity. It allows maintaining a low (<0.4 kg) and constant load during the extrusion of paste, and the paste's composition remains constant and close to that of the initial paste. Analogous behavior was observed when adding a third component into the solid phase, especially SrCO_3 as a contrasting agent. Moreover, the cement's mechanical properties can be enhanced by lowering the US ratio because of the lower plastic limit. Finally, unloaded or Sr-loaded cements show uniform and increased optical density because of the enhanced homogeneity of dry component distribution. Interestingly, this study reveals that cogrinding improves and controls essential cement properties and involves processing parameters that could be easily scaled up. This constitutes a decisive advantage for the development of calcium carbonate-calcium phosphate mixed cements and, more generally, of injectable multicomponent bone cements that meet a surgeon's requirements
机译：在本研究中，我们旨在评估共研磨过程对控制碳酸钙-磷酸二钙二水合物水泥性能的贡献。我们设置了一种方法来评估通常发生在糊料挤出过程中的相分离，该方法是定量的，可靠的和可区分的，并指出了共研磨对限制压滤的决定性作用。我们显示固相共研磨导致对水泥注入性，机械性能和射线不透性的协同正效应。它可以在糊料挤出过程中保持较低的重量（<0.4千克）和恒定的负载，并且糊料的成分保持恒定并接近初始糊料的组成。当将第三组分，特别是作为对比剂的SrCO_3添加到固相中时，观察到类似的行为。此外，由于较低的塑性极限，可以通过降低US比来增强水泥的机械​​性能。最后，由于干燥组分分布的均一性增强，未加载或加载Sr的水泥显示出均匀且增加的光密度。有趣的是，这项研究表明，共研磨改善并控制了水泥的基本性能，并且涉及易于扩展的加工参数。这对开发碳酸钙-磷酸钙混合水泥以及更普遍地满足外科医师要求的可注射多组分骨水泥具有决定性的优势。

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