Influence of different processing phases on the physicochemical properties of two calcium silicate-based cements
Jussaro Alves Duque, Clovis Monteiro Bramante, Victor Coca, Rafaela Fernandes Zancan, Rodrigo Ricci, Vivan Bruno Martini Guimarães, Marco Antonio Hungaro Duarte
Objective: The purpose of this study is to evaluate if the physicochemical properties are influenced by the processing steps of cement production. The chemical composition, setting time, solubility, pH value and calcium ion released by Portland cement were measured through all stages of the manufacturing process (G1), as well as the cement that was obtained through the step of calcination (G2). Methods: The chemical composition was examined by energy dispersive x-ray spectroscopy (EDS). Setting time and solubility tests were performed in accordance with regulation #57 of the ADA. Calcium ion release was analyzed using an atomic absorption spectrophotometer. The change in pH was determined using a pH meter. Results: The chemical composition of both cements contained high levels of calcium and silicon, but the Portland cement showed traces of sulfur. The setting times of G2 were significantly lower than those of G1 (p < 0.05). Both cements presented values within those recommended by the ADA for solubility, which is at most 3%; however, the solubility of G2 was higher when compared with G1. The analysis of pH and calcium ions release exhibited alkalinized pH and calcium ion release in both groups, independent of the time of analysis. Conclusion: The results suggest that the physicochemical properties are influenced by the processing steps of cement production.
Keywords: Endodontics. Solubility. Physical and chemical properties.
How to cite: Duque JA, Bramante CM, Coca V, Vivan RR, Zancan RF, Guimarães BM, Duarte MAH. Infuence of different processing phases on the physicochemical properties of two calcium silicate-based cements. Dental Press Endod. 2016 May-Aug;6(2):21-7. DOI: http://dx.doi.org/10.14436/2358-2545.6.2.021-027.oar
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