Chang Seok Woo
Department of Conservative Dentistry, School of Dentistry, Kyung Hee University, Seoul, Republic of Korea.
Bioinorg Chem Appl. 2018 Feb 1;2018:2784632. doi: 10.1155/2018/2784632. eCollection 2018.
Chemical composition and porosity characteristics of calcium silicate-based endodontic cements are important determinants of their clinical performance. Therefore, the aim of this study was to investigate the chemical composition and porosity characteristics of various calcium silicate-based endodontic cements: MTA-angelus, Bioaggregate, Biodentine, Micromega MTA, Ortho MTA, and ProRoot MTA. The specific surface area, pore volume, and pore diameter were measured by the porosimetry analysis of N2 adsorption/desorption isotherms. Chemical composition and powder analysis by scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS) were also carried out on these endodontic cements. Biodentine and MTA-angelus showed the smallest pore volume and pore diameter, respectively. Specific surface area was the largest in MTA-angelus. SEM and EDS analysis showed that Bioaggregate and Biodentine contained homogenous, round and small particles, which did not contain bismuth oxide.
硅酸钙类根管充填水门汀的化学成分和孔隙率特征是其临床性能的重要决定因素。因此，本研究旨在调查多种硅酸钙类根管充填水门汀的化学成分和孔隙率特征：MTA-angelus、Bioaggregate、Biodentine、Micromega MTA、Ortho MTA和ProRoot MTA。通过N2吸附/解吸等温线的孔隙率分析来测量比表面积、孔体积和孔径。还对这些根管充填水门汀进行了扫描电子显微镜（SEM）和能谱分析（EDS）的化学成分及粉末分析。Biodentine和MTA-angelus分别显示出最小的孔体积和孔径。MTA-angelus的比表面积最大。SEM和EDS分析表明，Bioaggregate和Biodentine含有均匀、圆形的小颗粒，且不含氧化铋。
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