Effect of different luting procedures on the seating of ceramic inlays

This in vitro study evaluated the effect of different luting procedures on the proper seating of ceramic inlays and on the marginal seal through micro leakage testing. Sixty mesial-, occlusal-, distal-(MOD) cavities were prepa red in third molars, and distributed among four groups. In the control grou p 1, the cavity surface was treated with dentin and enamel bonding agents; ceramic inlays were placed into the cavity and light cured. In group 2, the dentin and enamel bonding agents were cured prior to the placing of the in lays, and following the insertion. In group 3, the inlays were luted withou t enamel bonding. Ingroup 4, the inlays were cemented using a one-bottle bo nding and two times light curing. The groups with only one time light curin g at the end of the luting process exhibited the smallest luting space foll owing cementation. The smallest dye penetration values were obtained for th e two groups with separate light curing of the dentin bonding agent. Reduci ng the him thickness of polymerized dentin bonding agents, i.e. by changing the composition of the bonding agents, could facilitate proper seating of ceramic inlays together with a better marginal seal.