Avaliação da densidade óptica do cimento portland associado a agentes radiopacificadores em diferentes proporções

Abstract

Objective: Evaluate the radiopacifier potential of some substances associated with Portland cement (CP) at different concentrations when compared to MTA. Methods: Were evaluated in this study Portland cement, the MTA and the following radiopacifiers : iodoform , bismuth oxide , lead oxide , bismuth subnitrate , barium sulfate and zirconium oxide . Samples were prepared according to the determination No 57 (2000) ANSI -ADA. Was added to the Portland cement in the proportions of said radiopacifying 15 %, 20 % and 30 %. Each sample was imaged next to the stepwedge using a digital radiography sensor Instrumentarium Kavo EXPRESS®. Adobe Photoshop®CS6 program was used to analyze the radiopacity of the cement and the data were subjected to statistical analysis ANOVA and Tukey test at a significance level of 5 %. Results: The pure Portland cement (PC) had the lowest amount of radiopacity . The CP addition of radiopacifiers showed the highest amount of radiopacity for the CP + lead oxide in a proportion of 30 % (4,7365 mmEq.Al) and was lowest for the CP + barium sulfate in a ratio of 15 % (1,5760 mmEq.Al). Conclusion : The Portland cement showed nearest optical density of MTA when combined with bismuth subnitrate (20%) and iodoform (20%. The addition of radiopacifiers 15% are not ideal for enhancing the radiopacity of Portland cement.