Avaliação da radiopacidade dos cimentos MTA Angelus® branco, MTA repair HP, biodentine® e BIO C repair por meio de radiografia digital

Abstract

The satisfactory radiopacity of anendodontic sealer is na important property that hás already been observed in cements derived from CP, White MTA and MTA Repair. However, endodontics is constantly evolving, and new cements are being developed to replace MTA, with similar properties, but with low erradiopacity. Through digital radiography, the objective of this study was to analyze the radiopacity of the endodontic sealers MTA Branco, MTA Repair HP, BiodentineandBio C Repair, comparing them with the dental structures. For the evaluation of the radiopacity of the cements MTA ANGELUS® White, MTA REPAIR HP, Biodentine and Bio C Repaire last omermatrices, 2 mm high and with a central opening of 4 mm in diameter, were used to make Five specimens of each material to be studied. A sound human lower molar tooth was used in order to compare the radiopacity of the materials with enameland dentin. The radiographs were take nusing the periapical Xray apparatus Dabi Atlante (Brazil), with Constant exposure time and the focus-film distance set at 40 cm, providing a perpendicular incidence. In each evaluated structure, an ROI and mean, standard deviation, minimum and maximum values were determined. The optical densities of the tested cements, enamel, dentin and steps of the density scale were presente dusing means, standard deviations and medians. To assess the normality of radiopacity values, the Shapiro-Wilk test was applied. To compare the radiopacities of the three cements tested, the Kruskal-Wallis test and Dunn's post-hoc test were used. The SPSS program (Statistical Package for the Social Sciences, version 21.0, Chicago, USA) was used, with a significance level of 5% (p ≤ 0.05). The present study indicated BIO-C and MTA B with high erradiopacity values when compared to MTA HP and Biodentine, with the former presenting similar and satisfactory radiopacity values, while biodentine did not reach values considered sufficient for radiopacity in radiographs digital. It is concluded that Bio-Cis a possiblesubstitute for MTA, requiring further studies on its physico-chemical properties.