Influence of Heliobond on Microtensile Bond Strength of a New BIS-GMA Free Versus BIS-GMA Containing Composite Resin Restoration

AIM: The main objective of this study was to assess the micro-tensile bond strength (µTBS) a free bisphenol-a-diglycidyl-ether-dimethacrylate (Bis-GMA) resin composite restorative material compared Bis-GMA-containing following application hydrophobic coating (heliobond). MATERIALS AND METHODS: A flat occlusal dentin surface exposed in total eighty extracted teeth that were removed for periodontal reasons. Teeth divided into two equal groups according type applied filling materials: BIS-GMA-free versus BIS-GMA-containing (n = 40). Each group subdivided subgroups 20) Heliobond (hydrophobic coating). has been after adhesive and before application. first restored by Free Bis-GMA Resin Composite (Admira, Voco, Germany); second Bis- GMA-containing (Grandio, Germany). tested cured manufacturer’s instructions. RESULTS: Regardless different types, there statistically significant difference (p < 0.05) among all subgroups. Specimens with recorded higher µTBS mean value (30.46 ± 6.7 megapaskal [MPa]) than without Heliobond, which (23.95 9.02 MPa). CONCLUSION: Application an extra layer (Heliobond) improved performance systems utilized new