Avaliação da radiopacidade dos cimentos MTA angelus branco e MTA repair HP por meio de tomografia computadorizada de feixe cônico

Abstract

The objective of this study is to evaluate the radiopacity of white MTA ANGELUS® and REPAIR HP MTA with human dental sctructure. The study was made from the making of five test specimens for each cement used, with 4mm in diameter and 2 mm high, in elastomer matrices. To obtain a standard of comparison a mesio-distal slice with 2 mm thickeness of a healthy human inferior molar was used. The test specimens and the sectioned tooth were submitted to the Cone Bean Computed Tomography exam. For each set, five images were analised, first in the program Radiant, for the selection of the tomography sections, and after, in the software ImageJ, those sections were analysed. The radiopacity of the tested cements, the enamel and dentin were presented using means and standard deviation. To asses the normality of the data the Shapiro-Wilk test was applied. For comparison between the two cements a T test was applied. The program SPSS (Statiscal Package for the Social Sciences, version 13.9, Chicago, USA) was used, with a signifcance level of 5% (p ≤ 0,05). After analysis, the dentin and the enamel presented radiopacities of 727,70 (199,04 SD) and 1730,48 (523,84 SD) voxel values, respectively. A significantly diferente radiopacity of 5716,91 (914,19 SD) and 4315,36 (899,08 SD) voxel values for the MTA B and the MTA HP, respectively, was verified. It could be concluded that, both the MTA HP and MTA B, have the required radiopacity for endodontic use.