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Evaluation of Shear Bond Strength of a New Self-Adhesive Composite to Dentin

Introduction: Today, much of the researches and innovations in dental materials are focused on simplification of the honding procedures.The aim of this study was to assess the shear bond strength(SBS) of a new self-adhesive flowable cornpositetf.lass V Embrace Wetbond, Pulpdent, Watertown, USA) to dentin. Materials & Methods: In this in vitro experimental study, 40 intact human third molars were selected and randomly divided into 4 groups of 10 teeth. Group ((Control group): After etching and application of Excite Bond(Ex). Tetric Flow(TF) composite was injected into the plastic ring over the prepared dentin surface and light cured(EtchlExffF).Group Il.After etching and application of Ex, Embrace Wethond(EW) composite was injected into the plastic ring and light cured(EtchlExfEW).Group lll:After etching, EW was injected into the plastic ring and light cured(EtchlEW). Group IV:EW was injected into the plastic ring and light cured according to manufacturerʹs instruction (EW).The data were analysed hy ANDV A and Scheffe tests. Results: The mean SBS and Standard deviations for groups Lll.Ill.Iv were 13.38±O.82,9.99±1.30.2.42±O.S8 and 3.08±O.8S MPa respectively.Statistical analysis revealed that: l.The mean SBS of EW composite in groups ll,lll,lV was significantly lower than groups l(PO.05). Conclusion: Bond strength of EW composite without application of bonding agents was much lower than TF composite combined with Ex bond.Application of EW composite over the total etch adhesive improved SBS.Application of EW composite over the etched dentin did not improve SBS.