Effect of rewetting cavities with HEMA-desensitizers on microleakage of adhesive-luting-cement

Objectives: The aim of this study was to evaluate the effect of two different agents which are the combination of dentin disinfectant and HEMA solution (Hemaseal&Cide and Aqua Prep F) on the microleakage of an adhesive luting cement.

Materials and Methods: Cylindrical cavities were prepared on the buccal surfaces of thirty extracted human third molars using standard sized diamond burs. One of the desensitizers (Hemaseal&Cide or Aqua-Prep F) was applied to the inlay cavities. Ten samples were used as control, no desensitizer application was performed. Inlay restorations were luted with an adhesive cement used with total-etch system, Variolink II (Ivoclar-Vivadent). The restorations were properly finished and thermocycled. The microleakage scores were examined on the occlusal and gingival margins at the x30 magnification after each sample was stained with 0.5% basic fuchsin and separated into four parts using a thin diamond blade. Then, the samples were evaluated in the SEM. The microleakage data were analyzed using Kruskall Wallis and Mann Whitney U tests.

Results: Aqua-Prep F applied samples demonstrated higher microleakage scores at the occlusal margins when compared to the Hemaseal&Cide and control groups (p<0.05). Hemaseal&Cide application led to lower leakage scores both at the enamel and dentin margins than the other groups (p<0.05). In accordance with these results, Aqua-Prep F samples generally showed distinct gaps at the enamel margins.

Conclusion: Hemaseal&Cide desensitizer was found effective as a rewetting agent and led to lower leakage scores than the control group. On the other hand, Aqua-Prep F increased the leakage scores at the enamel margins.