Abstract
The objective of this research was to verify the degree of marginal infiltration in class-V, vestibular, and lingual cavities in 30 recently-extracted human premolar teeth, divided into four groups, which, after the thermal cycle at 5oC/55oC, and stained with 2% methylene blue, were assessed in two ways: 1 - types of dentin bonding: self-etching adhesive (no load) and restored with micro-hybrid composite resin, one-bottle adhesive (with load), on which acid attack was conducted, and which was restored with micro-hybrid composite resin, and 2 - location of the cavity wall ( enamel occlusal wall and cement gingival wall). The data were measured through scores of 0 to 4 and statistically analyzed by nonparametric Kruskal-Wallis test to demonstrate the most effective dentin adhesive and determine which cavity wall that allowed less dye leakage.
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