Avaliação da microdureza vickers de dois compósitos variando a composição e distância de fotopolimerização.

Abstract

Composite resins represent restorative materials most used for rehabilitation of dental cavities in anterior teeth. To this need in the composition of filler particles which provide improved surface smoothness, making the polishing procedure, while contributing to the increase in the mechanical strength. The aim of this study was to compare the compressive strength of two composite resins used in the School Clinic of Dentistry UFCG / Patos-PB with different inorganic fillers, varying the distance curing. 60 specimens of the two brands studied will be made in accordance with ISO 4049, and these will be subjected to measurement of Vickers Microhardness, after polymerization, varying the distance of the tip of the curing light to the body of evidence. Data were analyzed with SPSS (version 21) software and after the application of statistical tests of Kruskal Wallis and Mann Whitney statistical difference was observed in comparisons with distance from 3mm to Llis® resin, which is formed by inorganic filler particles barium-aluminum glass. This shows that some brands do not allow a separation of the tip of the curing light, which if not met can affect the hardness of composite resins.