使用X射线微分析对白钨酸钙三氧化物聚集体和白色波特兰水泥进行的比较研究。
A comparative study of white mineral trioxide aggregate and white Portland cements using X-ray microanalysis.
作者信息
Asgary Saeed, Parirokh Masoud, Eghbal Mohammed Jafar, Brink Frank
机构信息
Endodontic Department, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
出版信息
Aust Endod J. 2004 Dec;30(3):89-92. doi: 10.1111/j.1747-4477.2004.tb00416.x.
The purpose of this study was to determine and compare the composition of white mineral trioxide aggregate (WMTA) and two different white Portland cements (WPCs). Samples of WMTA and WPCs were prepared and then imaged in a JEOL JSM6400 scanning electron microscope, equipped with an Oxford Instruments light element energy dispersive spectrometer detector for determining the elemental composition. Electron probe microanalysis (EPMA) results indicated that lime (CaO) and silica (SiO2) were the dominant compounds in each case. The results showed that the trace elements are similar in all of the samples but there was no detectable trace of bismuth oxide (Bi2O3) in WPCs. The range of crystal sizes observed in WMTA was found to be distinctly smaller than those observed in the WPCs. It was concluded that there is no significant difference between the dominant compounds in both WMTA and WPCs except the presence of bismuth oxide in WMTA.
本研究的目的是测定并比较白色矿物三氧化物凝聚体（WMTA）和两种不同白色波特兰水泥（WPC）的成分。制备了WMTA和WPC的样品，然后在配备牛津仪器轻型元素能量色散光谱仪探测器以测定元素组成的JEOL JSM6400扫描电子显微镜中成像。电子探针微分析（EPMA）结果表明，在每种情况下，石灰（CaO）和二氧化硅（SiO2）都是主要化合物。结果显示，所有样品中的微量元素相似，但在WPC中未检测到氧化铋（Bi2O3）的痕迹。发现WMTA中观察到的晶体尺寸范围明显小于WPC中观察到的晶体尺寸范围。得出的结论是，除了WMTA中存在氧化铋外，WMTA和WPC中的主要化合物之间没有显著差异。
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