| Influência de um selante de superfície na infiltração marginal de restaurações Classe V, em resina composta com margens em dentina

Abstract

Influence of surface sealant on the microleakage of Class V resin restorations with dentinal margins Abstract | The aim of this study was to evaluate the effect of the surface sealant Biscover® in reducing or eliminating microleakage in class V composite restorations. Thirty-six class V cavities were prepared in vestibular surface of bovine inci- sors, with cervical and oclusal margin in dentine. The samples were randomly assigned in two groups with eighteen teeth each group. In the group A (control), the teeth were finished and polished,and the surface sealant was not applied. In the group B, after restoration and polishiment, the surface sealant was applied. The samples were submitted to the process of thermo cycling corresponding to a total of five hundred cycles, with thermal variation of between 5°C an 55°C and immersed in 2% methylene blue solution for 24 hours. The sectioned surfaces were evaluated by the infiltration of me - thylene solution in the margin surface. The results were statistically analyzed using Mann-Whitney test and no significant differences were found between the groups. In view of these results it was concluded that the surface sealant application do not decrease the microleakage.