The objective of the study is to evaluate the influence of handling method (spatulation, grinding and ultrasonic agitation) on the physicochemical properties of the MTA and a cement based on calcium silicate. Surface characterization tests will be performed, flow, setting time, solubility, pH and calcium ion release. The cement will be characterized by a combination of scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). For the flow test, the standards will be followed in 57 ANSI / ADA (2000). In determining the setting time, the rules will be used in 57 ANSI / ADA (2000) and ASTM C266 / 2008. The solubility will be assessed volumetrically in microtomógrafo (micro-CT). Acrylic teeth (n = 10) with end cavities are micro-CT scanned upon insertion of cement and after immersion for 7 and 14 days in 50mL water Milli-Q. For the analysis of pH and calcium ion release the same specimens of solubility analysis will be used. After periods of 3, 24, 72, 168 (7 days) and 336 hours (14 days), the samples are immersed in water new flask containing 50 mL Milli-Q. To measure pH, will use a pH meter and release of calcium ions, one atomic absorption spectrophotometer equipped with a specific hollow cathode lamp for calcium. The results will be submitted to the tests of D'Agostino and Pearson for normal distribution check choosing the most appropriate statistical test for each analysis. For all tests will be considered the significance level of 5%.
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