Análise da composição química dos cimentos pbs cimmo® hd, mta angelus® branco e bio-c repair® através de microscopia eletrônica de varredura (MEV) acoplada a espectrômetro de energia dispersiva (EDS)

Abstract

This study aimed to analyze the chemical composition of the cements PBS CIMMO® HD, MTA Angelus® white, and Bio-C Repair®. To conduct the study, five specimens of each cement type were prepared, with a diameter of 4 mm and a height of 1 mm, mounted on Stubs using a double-sided carbon conductive tape. This set was placed in the metallizer chamber, where a thin layer of conductive material was applied to the surface, allowing electron conduction. After this step, the samples were examined using a scanning electron microscope (SEM) connected to an energy-dispersive spectrometer (EDS). The obtained data underwent the Kolmogorov-Smirnov statistical test to check for normality. Chemical elements that showed a normal distribution (with a 5% mean) were analyzed using the ANOVA test, while the Kruskal-Wallis test was used for data with skewed distribution. After the analyses, the identified elements were 13. For PBS CIMMO® HD: O, C, Ca, Mg, Al, Si, S, Ba and Fe; for the white MTA: O, C, Ca, Al, Si, W, and Au; and for Bio-C Repair: O, C, Ca, Na, Al, Si, Zr, and Au. Among these elements, 5 were found in all the cements studied: O, C, Ca, Al, and Si. The elements Na and Zr were identified only in Bio-C Repair. Mg, S, and Fe were found only in the PBS CIMMO® HD samples. In the analyzed specimens, O, C, and Ca showed the highest average concentrations. Knowledge of the chemical composition of hydraulic cements is important for understanding the physicochemical and biological properties of this category of materials.