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[Glass-ionomer cements in Class V restorations].

The aim of the present study was to evaluate the effect of two different techniques of glass-ionomer application on the marginal microleakage in Class V restorations. Two types of composite resins were also used. Nonretentive Class V cavities were prepared at the cementum enamel junction of human extracted third molars. Glass-ionomer cements were applied with a chamfer technique or as base in the floor of the cavity. After restoration, the samples were stored in dye solution, sectioned and observed under optical stereomicroscope. The base technique for glass-ionomer cements showed less microleakage than the other restorative methods.