title: Effects of hydrogen peroxide pretreatment and heat activation of silane on the shear bond strength of fiber-reinforced composite posts to resin cement.
abstract: OBJECTIVE
  To evaluate the effects of hydrogen peroxide pretreatment and heat activation of silane on the shear bond strength of fiber-reinforced composite posts to resin cement.
  
  
  METHODS
  The specimens were prepared to evaluate the bond strength of epoxy resin-based fiber posts (D.T. Light-Post) to dual-curing resin cement (RelyX U200). The specimens were divided into four groups (n=18) according to different surface treatments: group 1, no treatment; group 2, silanization; group 3, silanization after hydrogen peroxide etching; group 4, silanization with warm drying at 80℃ after hydrogen peroxide etching. After storage of the specimens in distilled water at 37℃ for 24 hours, the shear bond strength (in MPa) between the fiber post and resin cement was measured using a universal testing machine. The fractured surface of the fiber post was examined using scanning electron microscopy. Data were analyzed using one-way ANOVA and post-hoc analysis with Tukey's HSD test (α=0.05).
  
  
  RESULTS
  Silanization of the fiber post (Group 2) significantly increased the bond strength in comparison with the non treated control (Group 1) (P<.05). Heat drying after silanization also significantly increased the bond strength (Group 3 and 4) (P<.05). However, no effect was determined for hydrogen peroxide etching before applying silane agent (Group 2 and 3) (P>.05).
  
  
  CONCLUSIONS
  Fiber post silanization and subsequent heat treatment (80℃) with warm air blower can be beneficial in clinical post cementation. However, hydrogen peroxide etching prior to silanization was not effective in this study.
authors.affiliation: Divison of Prosthodontics, Department of Dentistry, Asan Medical Center, Seoul, Republic of Korea.
authors.forename: Jung-Hoon
authors.identifier: 0000-0002-3332-965X
authors.initials: JH
authors.lastname: Pyun
authors.affiliation: Private Practice, Divison of Prosthodontics, Department of Dentistry, College of Medicine, University of Ulsan, Seoul, Republic of Korea.
authors.forename: Tae-Bong
authors.initials: TB
authors.lastname: Shin
authors.affiliation: Divison of Prosthodontics, Department of Dentistry, College of Medicine, University of Ulsan, Asan Medical Center, Seoul, Republic of Korea.
authors.forename: Joo-Hee
authors.initials: JH
authors.lastname: Lee
authors.affiliation: Division of Oral and maxillofacial Surgery, Department of Dentistry, College of Medicine, University of Ulsan, Asan Medical Center, Seoul, Republic of Korea.
authors.forename: Kang-Min
authors.initials: KM
authors.lastname: Ahn
authors.affiliation: Division of Prosthodontics, Department of Restorative Science, Herman Ostrow School of Dentistry of USC, University of Southern California, Los Angeles, California, USA.
authors.forename: Tae-Hyung
authors.initials: TH
authors.lastname: Kim
authors.affiliation: Divison of Prosthodontics, Department of Dentistry, College of Medicine, University of Ulsan, Asan Medical Center, Seoul, Republic of Korea.
authors.forename: Hyun-Suk
authors.initials: HS
authors.lastname: Cha
keywords: Fiber post; Heat treatment; Hydrogen peroxide; Shear strength; Silane