Volumetric microleakage assessment of glass-ionomer-resin composite hybridmaterials

Objective: This study was intended to quantify the marginal leakage of thre e glass-ionomer-resin composite hybrid materials and compare it with the le akage exhibited by a glass-ionomer cement and a bonded resin composite syst em. Method and materials: Standardized Class V cavities were prepared on ro ot surfaces of 105 extracted human teeth, randomly assigned to five groups of 21 each, and restored with either Ketac-Fil Aplicap, Z100/Scotchbond Mul ti-Purpose Plus, Vitremer, Photac-Fil Aplicap, or Dyract. The teeth were th ermally stressed for 500 cycles and stained with methylene blue. The microl eakage was quantified spectrophotometrically, and the data were statistical ly analyzed with Friedman's test. Results: There were no significant differ ences in microleakage among the five groups. Restorations of all tested mat erials showed some marginal leakage in Class V cavities. Conclusion: The mi croleakage performance of glass-ionomer-resin composite hybrid materials wa s similar to those of a conventional glass-ionomer and a bonded resin compo site system.