Avaliação da rugosidade superficial de resinas compostas submetidas à uma técnica de polimento.

Abstract

The finishing and polishing are useful procedures, which must be carried out with the purpose of reducing the surface roughness of the material. A rough surface has great influence on the aesthetics and longevity of the restorations. The aim of this study was to evaluate the rough surface after polishing over the four composite resins with different classification: Filtek ™ Nanoparticulate Z350 XT (3M / ESPE, USA), Micro Hybrid Charisma ® Classic (Heraeus Kulzer, Germany), Micro Hybrid Point 4 (Kerr, Orange, CA, USA) and Nanohybrid Premisa (Kerr, Orange, CA, USA). For that, it has made 40 samples, which has divided into four groups, thus 10 specimens for each group. The samples have submitted to a polishing technique, which used abrasive discs (Superfix System) and felt disks with polishing paste (Diamond Gloss). Subsequently, it has evaluated the roughness of the specimens by using a portable Mitutoyo ® rugosimeter (model SJ-210). The collected data were measure in MR (medium roughness) that applies to ANOVA statistical analysis, these followed by the Turkey test. After the data analyzes, which evaluated by the rugosimeter and Zeiss Optical Microscope, it has been verified that according to the methodology used the resin that present the higher surface smoothness was Filtek ™ Z350 XT. The Point 4 resin was the second higher, followed by Premisa and finally Charisma ®. There was a significant statistical difference between the Charisma® and Filtek ™ Z350 XT resins, considering a significance level of 5%.