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首页> 外文期刊>Acta biomaterialia >Phase composition and in vitro bioactivity of porous implants made of bioactive glass S53P4
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Phase composition and in vitro bioactivity of porous implants made of bioactive glass S53P4

机译：由生物活性玻璃S53P4制成的多孔植入物的相组成和体外生物活性

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摘要

This work studied the influence of sintering temperature on the phase composition, compression strength and in vitro properties of implants made of bioactive glass S53P4. The implants were sintered within the temperature range 600-1000 °C. Over the whole temperature range studied, consolidation took place mainly via viscous flow sintering, even though there was partial surface crystallization. The mechanical strength of the implants was low but increased with the sintering temperature, from 0.7 MPa at 635 °C to 10 MPa at 1000 °C. Changes in the composition of simulated body fluid (SBF), the immersion solution, were evaluated by pH measurements and ion analysis using inductively coupled plasma optical emission spectrometry. The development of a calcium phosphate layer on the implant surfaces was verified using scanning electron microscopy-electron-dispersive X-ray analysis. When immersed in SBF, a calcium phosphate layer formed on all the samples, but the structure of this layer was affected by the surface crystalline phases. Hydroxyapatite formed more readily on amorphous and partially crystalline implants containing both primary Na 2O·CaO·2SiO 2 and secondary Na 2Ca 4(PO 4) 2SiO 4 crystals than on implants containing only primary crystals.
机译：这项工作研究了烧结温度对由生物活性玻璃S53P4制成的植入物的相组成，抗压强度和体外性能的影响。在600-1000°C的温度范围内烧结植入物。在研究的整个温度范围内，固结主要通过粘性流烧结进行，即使存在部分表面结晶。植入物的机械强度较低，但随烧结温度的升高而增加，从635°C的0.7 MPa升高到1000°C的10 MPa。通过使用电感耦合等离子体发射光谱法进行pH测量和离子分析来评估模拟体液（SBF）（浸入溶液）的成分变化。使用扫描电子显微镜-电子弥散X射线分析验证了植入物表面磷酸钙层的形成。当浸入SBF中时，磷酸钙层会在所有样品上形成，但该层的结构会受到表面结晶相的影响。与仅包含初级晶体的植入物相比，在同时包含初级Na 2O·CaO·2SiO 2和次级Na 2Ca 4（PO 4）2SiO 4晶体的非晶态和部分晶体植入物中，羟基磷灰石的形成更容易。

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