ABSTRACT
There is a high demand for tooth-colored restorations in pediatric dentistry. Since etch-and-rinse adhesive systems are time-consuming, there is a tendency to replace them with simplified adhesive systems. This study compared microleakage of class V composite resin restorations in primary teeth restored using simplified adhesive systems. In this in vitro study standard class V cavities were prepared in 60 primary canines with incisal margins in enamel and gingival margins in dentin. The samples were randomly divided into 4 groups and restored as follows: Group 1: Opti Bond Solo Plus [OBP]; Group 2: Clearfil SE Bond [SEB]; Group 3: Clearfil S[3] Bond [S[3]B]; Group 4: Xeno IV [XeIV]. The cavities were filled with Filtek Z250 composite resin and observed under a stereomicroscope at x 32 for microleakage scoring. The results were analyzed with Kruskal-Wallis test followed by Mann-Whitney and Wilcoxon Signed Rank tests using SPSS software. The results showed significant differences between groups 1 and 4 and group 3 in enamel leakage [p value = 0.005]. There was also a significant difference between group 1 and groups 2 and 4 in dentinal leakage [p value = 0.001]. The test showed that enamel leakage in groups 1 and 4 was significantly lower than dentinal leakage in these groups. The strong acidic adhesives in groups 1 and 4 were more effective in enamel leakage prevention. The mild self-etching adhesive in group 3 was effective in enamel and was the best in dentin leakage prevention