Avaliação da microdureza Vickers de um compósito variando a distância e a unidade de fotopolimerização.

Abstract

Composite or composite resin restorative materials represent the most commonly 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 two units ((LED Optilight ® - Gnatus – e LED Olsen) curing of composites used in the School Clinic of Dentistry UFCG / Ducks by measuring the compressive strength, varying the distance curing. 60 specimens, each being studied unit 30 using predetermined distances were prepared according to ISO 4049, and these were subjected to measurement of Vickers hardness after polymerization, varying the distance of the tip from curing to the body proof. Data were analyzed with SPSS software (version 21) and after the nonparametric Kruskal- Wallis analysis and Mann-Whitney tests, was accepted as significant, p ≤ 0.05.After statistical analysis, statistically significant differences for unit type LED curing Optilight® (Gnatus), where it was used for the distance of 3mm (D3), in comparison with D1 and D2 was observed. Thus, it can be concluded that removal of the probe unit photopolymerization can adversely affect the hardness of the composites used in dentistry procedures.