Avaliação in vitro da resistência de duas resinas compostas submetidas a teste de compressão.

Abstract

The increased demand for aesthetic dentistry guided the development of composite resins with better physical and mechanical properties. Therefore, it is perceived that there is currently a wide variety of this material available. Thus, it is necessary to carry out scientific studies on composite resins. The aim of the present study was to evaluate in vitro the resistance of two photopolymerizable composite resins found on the market: Filtek Z350 XT from 3M and Zirconfill from Technw, after mechanical compression test and statistical analysis of the results. For this, four samples of each composite resin were used, which were submitted to the compression strength test in a universal test machine. The results were statistically analyzed using the Mann-Whitney test with a margin of error of 5.0%. To type the data and obtain the statistical calculations, the IBM SPSS program in version 23 was used. It was obtained that the force average was higher in the Zirconfill resin than in the Z350 resin; however, the median was highest in the Z350 resin. For the fixed margin of error (5.0%) there was no significant difference (p> 0.05) between the two resins in relation to the strength of resistance analyzed. And, therefore, the composite resins tested show similar values of compressive strength and do not present relevant differences.