Formulação de um material restaurador provisório experimental à base de óxido de zinco e óleo-resina de copaíba

Abstract

Zinc Oxide Eugenol (ZOE) cement is known for its biocompatibility, good marginal adaptation, easy manipulation, anodyne effect and antibacterial. However, the presence of residual free eugenol may interfere with the adhesion of definitive restorations to dental tissues, in addition to the cytotoxic potential. Copaiba oil has antimicrobial, bactericidal and bacteriostatic activities, therefore, an association between oxide zinc and copaiba would be the proposal for a new restorative material. In this way, the the aim of this study was to develop a cement composed of zinc oxide and oil copaiba resin for the purpose of temporary restorative. This research was composed of a single study, divided into two steps: Step I - Formulation of a provisional restorative agent (OZC); Step II - Experimental laboratory tests of setting time, pH, fluoride ion release and mechanical test of compression resistence in the bodies of proof previously prepared and compared with the Temporary Restorative Cement MRI – IODONTOSUL (OZE) and Vidrion R Plus – SSWhite (CIV) . The Lilliefors Normality Test was applied and, after verifying parametric distributions, the one-way ANOVA tests with Student's t-test were calculated . The significance level adopted for the p-value was α = 0.05. Regarding the results found from the setting time test, the CIV and OZC groups obtained similar results in both times, as well as the pH value remained stable throughout the test with minimal differences between the means of the groups. In reference to the compression test, the CIV group showed a higher mean value than the other groups, followed by the OZE and OZC groups. It was observed that the experimental restorative material presented setting time and pH levels within the ideal range, in addition to satisfactory results of mechanical compression force when considered as a dental material for provisional sealing purposes, however, new tests will be necessary in order to improve the results regarding the fluoride ion release rates.