Avaliação da radiopacidade dos cimentos MTA Angelus® branco, MTA HP repair, biodentine® e BIO C repair através de tomografia computadorizada de feixe cônico

Abstract

The aim of this study was to evaluate the radiopacity of MTA ANGELUS® white (MTA B), MTA REPAIR HP (MTA HP), Biodentine® and Bio-C Repair cements in comparison with human dental structures using cone beam computed tomography (CBCT). Specimens of each type of cement studied were made, with 4 mm diameter and 2 mm height, in elastomer matrices, a 2 mm thick mesio-distal slice of a sound human molar, and 12-step aluminum scale. The study elements were submitted to CBCT examination and the image generated was analyzed by means of the ICat® software to extract measurements in Hounsfield Unit for radiopacity comparison. Data normality was assessed using the Shapiro-Wilk test, which did not indicate a normality pattern. The analysis using the SPSS program (Statistical Package for the Social Sciences, version 21.0, Chicago, USA), with a significance level of 5% (p ≤ 0.05) presented a statistically significant difference between the radiopacity of MTA-B and Biodentine, an element that could be based by the difference between the molecular weight of their respective radiopacifiers, bismuth oxide (465.9 g/mol) and zirconium oxide (123.2 g/mol); as well as due to other parameters inherent to the handling of materials. Finally, it was concluded that all cements tested presented higher radiopacity than that reported by enamel and dentin.