The Journal of Advanced Prosthodontics

The Korean Academy of Prosthodonitics (대한치과보철학회)
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Effects of hydrogen peroxide pretreatment and heat activation of silane on the shear bond strength of fiber-reinforced composite posts to resin cement

  • Pyun, Jung-Hoon (Divison of Prosthodontics, Department of Dentistry, Asan Medical Center) ;
  • Shin, Tae-Bong (Private Practice, Divison of Prosthodontics, Department of Dentistry, College of Medicine, University of Ulsan) ;
  • Lee, Joo-Hee (Divison of Prosthodontics, Department of Dentistry, College of Medicine, University of Ulsan, Asan Medical Center) ;
  • Ahn, Kang-Min (Division of Oral and maxillofacial Surgery, Department of Dentistry, College of Medicine, University of Ulsan, Asan Medical Center) ;
  • Kim, Tae-Hyung (Division of Prosthodontics, Department of Restorative Science, Herman Ostrow School of Dentistry of USC, University of Southern California) ;
  • Cha, Hyun-Suk (Divison of Prosthodontics, Department of Dentistry, College of Medicine, University of Ulsan, Asan Medical Center)
  • Received : 2015.07.13
  • Accepted : 2016.02.15
  • Published : 2016.04.29
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Abstract

PURPOSE. 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. MATERIALS AND 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 $80^{\circ}C$ after hydrogen peroxide etching. After storage of the specimens in distilled water at $37^{\circ}C$ 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 (${\alpha}=0.05$). 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). CONCLUSION. Fiber post silanization and subsequent heat treatment ($80^{\circ}C$) with warm air blower can be beneficial in clinical post cementation. However, hydrogen peroxide etching prior to silanization was not effective in this study.

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