Avaliação da radiopacidade dos cimentos MTA Angelus Branco, Biodentine e Bio-C Repair por meio da radiografia digital

Abstract

The aim of this study was to comparatively evaluate the radiopacity of the repair cements MTA Angelus® Branco, Biodentine® and BIO-C® Repair. For radiopacity analysis, five specimens with 4 mm in diameter and 2 mm in height were made in elastomer matrices for each cement studied. Each specimen was radiographed by the digital method together with a 2 mm thick central slice of a healthy human lower molar tooth and an aluminum density scale, the thickness of which varied from 2 to 16 mm, in 2 mm increments. The exposure time, as well as the focus-film distance once determined, were kept constant for all exposures. For each set, five images were obtained and evaluated for optical densities using the histogram tool of ImageJ software. For each structure evaluated (dentin, enamel, White Angelus MTA, Biodentine, BIO-C Repair and the steps of the density scale) a pre-defined ROI was used and densities were presented using means and standard deviations. ANOVA and Tukey's post-hoc test was used to compare the radiopacity of the three cements, with a significance level of 5% (p ≤ 0.05). The repair cements tested showed statistically different radiopacities among themselves, being BIO-C Repair the most radiopaque and Biodentine the least radiopaque. However, the three cements studied have higher radiopacity than dental enamel, making zirconium oxide suitable to replace bismuth oxide in accordance with ISO 6876/2001.