Chemical composition and porosity characteristics of calcium silicate-based endodontic cements are important determinants of\ntheir clinical performance. Therefore, the aim of this study was to investigate the chemical composition and porosity characteristics\nof various calcium silicate-based endodontic cements: MTA-angelus, Bioaggregate, Biodentine, Micromega MTA, Ortho\nMTA, and ProRoot MTA. The specific surface area, pore volume, and pore diameter were measured by the porosimetry analysis of\nN2 adsorption/desorption isotherms. Chemical composition and powder analysis by scanning electron microscope (SEM) and\nenergy dispersive spectroscopy (EDS) were also carried out on these endodontic cements. Biodentine and MTA-angelus showed\nthe smallest pore volume and pore diameter, respectively. Specific surface area was the largest in MTA-angelus. SEM and EDS\nanalysis showed that Bioaggregate and Biodentine contained homogenous, round and small particles, which did not contain\nbismuth oxide.
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