RESUMO
Background and aim: introduction of a material that in blood contamination, can maintain marginal seal plays an important role in clinical success of a restoration. The aim of this study was to determine and compare microleakage rates of composite and compomer restorative materials, in blood contamination, with the application of Prompt L-Pop as an adhesive system
Materials and Methods: in this experimental study, One hundred and twenty C1V cavities, in dentino - enamal junction of buccal and lingual surfaces of extracted human sound molars, were prepared. After Prompt L-Pop application, the samples were divided in to 10 groups of 12 cavities Group Z, was control. Group Z, was contaminated. Group Z, was rinsed with water after contamination. Group Z, was rinsed with water after contamination and Prompt L-Pop was reused. Group Z, was similar to Z, but it was rinsed with Naocl after contamination. The cavities were filled with composite [Z 520]. The remaining five groups [F, to F,] were just the same but filled with compomer [F 2000]. After polishing and thremocycling [X 500], the microleakage rates of specimens were evaluated with dye penetration method. The data were statistically analyzed using Kruskal - Wallis and Mann - Whitney tests
Results: kruskal - wallis test revealed statistically significant differences among composite groups in gingival margins [P=0.017]. Mann - Whitney test showed more microleakage in group Z, as compared with groups Z,, Z, and Z, [P=0.005, P=0.015 and P=0.015, respectively] which was statistically significant. No significant differences were found, in microleakage rate, between composite and compomer groups in occlusal and gingival margins [P=0.34S and P=0.213, respectively]
Conclusion: according to the results of this study, blood contamination could increase the microleakage of composite and Prompt L-Pop in gingival margins. In this condition, rinsing with water and Naocl and Prompt L-Pop reapplication can decrease microleakage effectively