title: Effect of silane activation on shear bond strength of fiber-reinforced composite post to resin cement.
abstract: OBJECTIVE
  Among the surface treatment methods suggested to enhance the adhesion of resin cement to fiber-reinforced composite posts, conflicting results have been obtained with silanization. In this study, the effects of silanization, heat activation after silanization, on the bond strength between fiber-reinforced composite post and resin cement were determined.
  
  
  METHODS
  Six groups (n=7) were established to evaluate two types of fiber post (FRC Postec Plus, D.T. Light Post) and three surface treatments (no treatment; air drying; drying at 38℃). Every specimen were bonded with dual-curing resin cement (Variolink N) and stored in distilled water for 24 hours at 37℃. Shear-bond strength (MPa) between the fiber post and the resin cement were measured using universal testing device. The data were analyzed with 1-way ANOVA and by multiple comparisons according to Tukey's HSD (α=0.05). The effect of surface treatment, fiber post type, and the interactions between these two factors were analyzed using 2-way ANOVA and independent sample T-tests.
  
  
  RESULTS
  Silanization of the FRC Postec Plus significantly increased bond strength compared with the respective non-treated control, whereas no effect was determined for the D.T. Light Post. Heat drying the silane coupling agent on to the fiber-reinforced post did not significantly improve bond strength compared to air-syringe drying.
  
  
  CONCLUSIONS
  The bond strength between the fiber-reinforced post and the resin cement was significantly increased with silanization in regards to the FRC Postec Plus post. Bond strength was not significantly improved by heat activation of the silane coupling agent.
authors.affiliation: Division of Prosthodontics, Department of Dentistry, College of Medicine, University of Ulsan, Asan Medical Center, Seoul, Republic of Korea.
authors.forename: Hyun-Dong
authors.initials: HD
authors.lastname: Kim
authors.forename: Joo-Hee
authors.initials: JH
authors.lastname: Lee
authors.forename: Kang-Min
authors.initials: KM
authors.lastname: Ahn
authors.forename: Hee-Sun
authors.initials: HS
authors.lastname: Kim
authors.forename: Hyun-Suk
authors.initials: HS
authors.lastname: Cha
keywords: Heat treatment; Post and core technique; Resin cements; Shear strength; Silane