Comparative Evaluation of Microleakage of Zinc Phosphate Cement, Resin-Modified Glass Ionomer, and Two Dual-Cure Resin Cements: In Vitro Study

AIMS: The aim of this study is to evaluate and compare the sealing ability of a new resin cement which was undergoing trial with other three luting cements. SETTINGS AND DESIGN: In vitro study. SUBJECTS AND METHODS: Forty extracted intact human premolars were selected and standardized class 5 preparations for inlays were done at cementoenamel junction of buccal surfaces and direct composite inlay was fabricated. The samples were randomly grouped into 4: Group I luted with Rely X ARC resin cement, Group II with DCRC-10, a new indigenously developed resin cement, Group III with FujiCEM, and Group IV with zinc phosphate. After 24 h storage, samples were thermocycled and immersed in basic fuchsine dye. The longitudinal sections were assessed under a stereomicroscope for microleakage using graded criteria. STATISTICAL ANALYSIS USED: To analyze leakage scores among four groups and between enamel and dentin/cementum margins, Kruskal–Wallis nonparametric test and the Mann-Whitney test at P < 0.05 were used. RESULTS: The dye penetration at cementum/dentin margins showed a statistically significant difference among four groups (P < 0.001). Adhesive luting cements produced lesser leakage scores at both margins than those cemented with zinc phosphate. CONCLUSIONS: The indigenously developed resin cement (DCRC-10, Group II) is comparable to that of Group I (RelyX ARC) in terms of its luting efficiency.