Effect of resin coating on microtensile bond strength of resin cements to dentin and resin nanoceramic material
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Abstract
Objective: This study evaluated the effect of a resin coating material on microtensile bond strength between dentin and a resin nanoceramic material using three different resin cements.
Materials and Methods: Seventy-two sound permanent third molars were randomly assigned into six groups (n = 12 per group) according to resin coating procedure (coated and non-coated) and types of resin cement (Variolink N, Panavia V5, and RelyX Unicem). Cerasmart block was bonded to dentin with the resin cement, with or without the resin coating agent. Each specimen was sectioned into a stick shape with an approximate bonded surface area of 1x1 mm2. The microtensile bond strength (MTBS) was measured and statistically analyzed (α=0.05). The failure mode of the fractured specimen was investigated.
Results: The MTBS of Variolink N/non-coated was statistically lower than Variolink N/coated (p<0.05). In contrast, no significant differences were observed between the Panavia V5/non-coated and Panavia/coated group, nor between RelyX Unicem/non-coated and RelyX Unicem/coated group (p>0.05).
Conclusions: Within the limitations of this study, the effect of Bio Coat Ca as a resin coating material on microtensile bond strength was dependent on the type of resin cement used. The application of Bio Coat Ca significantly enhanced the microtensile bond strength of Variolink N to dentin, whereas no significant effect was observed for Panavia V5 and RelyX Unicem. Importantly, the application of Bio Coat Ca did not impair the bonding performance of Panavia V5 and RelyX Unicem.
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