Avaliação da cor e da rugosidade superficial de resinas compostas após imersão em diferentes soluções alimentares relacionada à cultura da região da Serra do Rio Grande do Sul

Abstract

The aim of this study was to analyze the color change and surface roughness behavior of two brands of composite resins when immmersed in five different solutions. For the research, two composite resins widely used in dentistry were pre-selected (Charisma Classic, and Empress Direct, Ivoclar). Was made forty specimens to each resin group, measuring 6x4mm with 2mm thickness, were cured with LED light (1250 mW / cm²) - Emitter A FIT (Schuster) according to the manufacturer's recommended time, polished with a Polipan 2 metallographic sander (Pantec) for 10 seconds, and washed in an ultrasonic washer for 6 minutes. Each group was randomly separated into five subgroups, containing 8 samples (n = 8) each. The samples were immersed in distilled water for 24 hours, washed in running water for 10 seconds, and submitted for 24 hours in the chosen solutions, distilled water, our control group, lemon, red wine, energetic and mate. To evaluate the color of the samples we used the spectrophotometer (Easyshade Advance 4.0, Vita), measuring the initial color of the samples before immersed in the solutions and the final color after withdrawing the solutions, performing a qualitative measurement based on the Vita scale (Vita Zahnfabrik). For surface roughness analysis, the SJ.201 (Mitutoyo) roughness meter was used. The specimen was positioned with the base polished up and a central measurement was made on each sample (cutoff 0.25). With data from all samples, the values were averaged for statistical analysis. The behavior of color stability of the composite resins was influenced by the immersion substance, and the solutions that had the biggest influence was red wine and mate, when you compare to the group control. The surface roughness behavior of the composite resins was not influenced by the immersion substance. There was no significant difference between the superiority of the tested marks when compared to the staining and surface roughness (sic).