Objective. The aim of this study was to evaluate the physicochemical properties and bioactivity of two formulations of calcium silicate-based cements containing additives (CSCM) or resin (CSCR), associated with radiopacifying agents zirconium oxide (ZrO2) and niobium oxide (Nb2O5) as micro- and nanoparticles; calcium tungstate (CaWO4); and bismuth oxide (Bi2O3). MTA Angelus was used as control. Methods. Surface features and bioactivity were evaluated by scanning electron microscopy and the chemical composition by energy dispersive X-ray spectrometry (EDS-X). Results. CSCM and CSCR presented larger particle sizes than MTA. Hydroxyapatite deposits were found on the surface of some materials, especially when associated with the radiopacifier with ZrO2 nanoparticles. All the cements presented calcium, silicon, and aluminum in their composition. Conclusion. Both calcium silicate-based cements presented composition and bioactivity similar to MTA when associated with the radiopacifiers evaluated.
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机译：目的。这项研究的目的是评估含有添加剂（CSCM）或树脂（CSCR）的两种硅酸钙基水泥配方的理化性质和生物活性，这些配方与不透辐射的氧化锆（ZrO2）和氧化铌（Nb2O5）关联。 -和纳米粒子；钨酸钙（CaWO4）;和氧化铋（Bi2O3）。 MTA Angelus被用作对照。方法。通过扫描电子显微镜评价表面特征和生物活性，并通过能量色散X射线光谱法（EDS-X）评价化学成分。结果。 CSCM和CSCR的粒径大于MTA。在某些材料的表面上发现了羟基磷灰石沉积物，特别是与带有ZrO2纳米粒子的不透射线剂结合时。所有的水泥都含有钙，硅和铝。结论。两种硅酸钙基水泥在与所评估的不透辐射剂结合时均表现出类似于MTA的组成和生物活性。
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