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首页> 外文期刊>Acta biomaterialia >Influence of design on bioactivity of novel CaSiO3-CaMg(SiO3)2 bioceramics: in vitro simulated body fluid test and thermodynamic simulation.
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Influence of design on bioactivity of novel CaSiO3-CaMg(SiO3)2 bioceramics: in vitro simulated body fluid test and thermodynamic simulation.

机译：设计对新型CaSiO3-CaMg（SiO3）2生物陶瓷生物活性的影响：体外模拟体液试验和热力学模拟。

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摘要

A new type of bioactive ceramic has been designed and obtained from high-temperature phase information from the wollastonite (CaSiO(3))-diopside (CaMg(SiO(3))(2)) phase equilibrium diagram. The selected composition was that corresponding to the eutectic point of the pseudobinary CaSiO(3)-CaMg(SiO(3))(2) system. The sintering behaviour, phase evolution, microstructural changes and in vitro bioactivity of CaSiO(3)-CaMg(SiO(3))(2) eutectic bioceramics were analysed by differential thermal analysis, X-ray diffraction, field emission scanning electron microscopy (FE-SEM) and image analysis. A simulation of the dissolution properties of the different materials studied, in water as well as in simulated body fluid (SBF), was also carried out by thermodynamic calculations, with the purpose of understanding the in vitro results obtained. The results demonstrate that the CaMg(SiO(3))(2) is significantly less soluble than CaSiO(3), developing an in situ porous structure (biomimetic porous bone material) with adequate biodegradation rate and stability strength when immersed in SBF. The influence of the microstructure (porosity, grain size and phase composition) on the in vitro bioactivity of the obtained bioceramics was also examined.
机译：从硅灰石（CaSiO（3））-透辉石（CaMg（SiO（3））（2））相平衡图的高温相信息中，设计并获得了一种新型的生物活性陶瓷。选择的成分是对应于伪二元CaSiO（3）-CaMg（SiO（3））（2）系统的共晶点的成分。通过差示热分析，X射线衍射，场发射扫描电子显微镜（FE）分析了CaSiO（3）-CaMg（SiO（3））（2）共晶生物陶瓷的烧结行为，相演变，微观结构变化和体外生物活性。 -SEM）和图像分析。为了理解所获得的体外结果，还通过热力学计算对所研究的不同材料在水中以及在模拟体液（SBF）中的溶解特性进行了模拟。结果表明，CaMg（SiO（3））（2）的溶解度明显低于CaSiO（3），当浸入SBF时会形成具有适当生物降解速率和稳定强度的原位多孔结构（仿生多孔骨材料）。还检查了微观结构（孔隙度，晶粒尺寸和相组成）对获得的生物陶瓷的体外生物活性的影响。

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