Avaliação da Radiopacidade dos Cimentos MTA Angelus branco e Biodentine por meio de tomografia computadorizada de feixe cônico

Abstract

The objective of the present work was to perform a comparative analysis of the radiopacity of White MTA Angelus®and Biodentine® repair cements in relation to dental structures. For this purpose, five specimens of each studied cement were made , with 4 mm of thickness diameter and 2 mm high , in elastomeric matrices. Each sample together with a 2 mm thick central slice of a healthy lower human molar tooth and an aluminum density scale, has a thickness ranging from 2 to 16 mm, with 2 mm increments, they were properly positioned on an acrylic platform and subjected to cone beam computed tomography exams with the following protocol of acquicition: FOV of 3 x 16 cm, vovel of 0,25 mm and rotation time of 26,9 seconds. For each tomografic exam, with the aid of th Radiant program, selected 13 images were evaluated for optical densities using the histogram tool of the ImageJ software. In each evaluated structure (enamel, dentin, White MTA, Biodentine ant the steps of the density scale) with a pre-defined ROI and the densities were presented using means and standard deviation. The normality of the data was evaluated using Shapiro-Wilk test. The comparioson of the radiopacities of the two cements tested was performed using Test T and the SPSS program ( Statistical Package for the Social Sciences, version 13.0, Chicago, USA) was used , with a significance level of 5% ( p ≤ 0.05). After analyzing the data, he indicated that the tested cements have radiopacities that are statistically different from each other, with the most radiopaque being White MTA and the least radiopaque being Biodentine. That the two cements analyzed have radiopacity in accordance with ISO 6876/2001, making calcium tungstate and zirconium oxide suitable to replace bismuth oxide. However, it is worth noting that the three cements have radiopacity superior to that of enamel.