title: In-vitro comparison of the effect of different bonding strategies on the micro-shear bond strength of a silorane-based composite resin to dentin.
abstract: BACKGROUND
  The current study evaluated the micro-shear bond strengths of a new low-shrinkage composite resin to dentin.
  
  
  METHODS
  In this in-vitro study, 70 extracted premolars were assigned to one of seven groups (n = 10): Group 1: OptiBond Solo Plus (Opt; Kerr); Group 2: SE Bond (SE; Kuraray); Group 3: Silorane System Adhesive (SSA; 3M ESPE); Group 4: OptiBond Solo Plus + LS Bond (Opt LS); Group 5: SE Bond + LS Bond (SE LS); Group 6: OptiBond Solo Plus (Opt Po); and Group 7: SE Bond (SE Po). Occlusal dentin was exposed and restored with Filtek LS (3M ESPE) in groups 1 to 5 and Point 4 (Kerr) in groups 6 and 7. After thermocycling (1000 cycles at 5/55΀C), micro-shear bond test was carried out to measure the bond strengths. The results were submitted to analysis of variance and post hoc Tukeytests (P < 0.05).
  
  
  RESULTS
  Two-way ANOVA showed no significant differences between the two types of composite resin (P = 0.187), between bonding agents (P = 0.06) and between composite resin and bonding agents (P = 0.894). Because P value of bonding agents was near the significance level, one-way ANOVA was used separately between the two composite groups. This analysis showed significant differences between silorane composite resin groups (P = 0.045) and Tukey test showed a significant difference between Groups 4 and 5 (P = 0.03).
  
  
  CONCLUSIONS
  The application of total-etch and self-etch methacrylate-based adhesives with and without use of a hydrophobic resin coating resulted in acceptable bond strengths.
authors.affiliation: Dental Material Research Center and Department of Restorative Dentistry, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
authors.forename: Pouran
authors.initials: P
authors.lastname: Samimi
authors.affiliation: Graduate, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran; Department of Restorative Dentistry, Zahedan University of Medical Sciences, Isfahan, Iran.
authors.forename: Vahid
authors.initials: V
authors.lastname: Alizadeh
authors.affiliation: Dental Material Research Center and Department of Restorative Dentistry, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
authors.forename: Kamyar
authors.initials: K
authors.lastname: Fathpour
authors.affiliation: Dental Material Research Center and Department of Restorative Dentistry, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
authors.forename: Hamid
authors.initials: H
authors.lastname: Mazaheri
authors.affiliation: Torabinejad Dental Research Center and Department of Restorative Dentistry and Material Engineering, Biomaterial Research Group, University of Technology, Isfahan, Iran.
authors.forename: Vajihosadat
authors.initials: V
authors.lastname: Mortazavi
keywords: Low; bond; bonding agents; composite resins; contraction; micro; shear; strength