EFFECT OF 2 DENTIN BONDING AGENTS ON MICROLEAKAGE IN 2 DIFFERENT CAVITY DESIGNS

Studies have shown that cavity design and dentinal bonding agents can affect composite resin microleakage. This study compared the microleak age at cementum-dentin margins of box- and V-shaped preparations resto red with two different bonding agents. Twenty freshly extracted, human third molars were prepared with one box-shaped and one V-shaped prepa ration on the mesial or distal surface. Occlusal margins were terminat ed in etched enamel and gingival margins were in cementum-dentin. Ther e was no statistically significant difference (p > 0.05) between Dual Cure Scotchbond and Scotchbond 2 samples restored in the box-shaped pr eparations, but Scotchbond 2 had statistically significantly less micr oleakage (p < 0.05) than Dual Cure adhesive in V-shaped preparations. The sealing of dentinal bonding agents varied in different cavity desi gns.