Shear Bond Strength of Three Auto-adhesive Resin Cements to Dentin

Today much of the researches and innovations in dental materials are focused on simplification of the bonding procedures. The aim of this study was to assess shear bond strength (SBS) of three auto-adhesive dual-cured resin cements to dentin. In this in vitro experimental study 40 intact human Third molars were selected and randomly divided into 4 groups of 10 teeth. Group I (Control group): After 15 seconds of etching and application of Excite DSC Bond (Ex) Varilink II (Var II) composite was injected into the plastic ring and light cured. Group II: RelyX Unicem (RX) was injected into the plastic ring and light cured after 30 seconds (according to manufacturer's instruction). Group III: Maxcem (Mc) was injected into the plastic ring and light cured after 30 seconds (according to manufacturer's instruction). Group IV: Multilink Sprint (MS) was injected into the plastic ring and light cured after 30 seconds (according to manufacturer's instruction). After thermal cycling (1000 cycle 5-55˚C) SBS were measured for each groups with a Zwick/Roell Universal Testing Machine. The data were analyzed by ANOVA and Scheffe tests. The mean SBS and Standard deviations for groups I II III and IV were 12.95±2.64 6.73±0.79 3.01±0.90 and 4.60±0.75 MPa respectively. Statistical analysis revealed that: 1. The mean SBS of Var II was significantly higher than the other groups (P)