J Adv Prosthodont.  2016 Apr;8(2):94-100. 10.4047/jap.2016.8.2.94.

Effects of hydrogen peroxide pretreatment and heat activation of silane on the shear bond strength of fiber-reinforced composite posts to resin cement

Affiliations
  • 1Divison of Prosthodontics, Department of Dentistry, Asan Medical Center, Seoul, Republic of Korea.
  • 2Private Practice, Divison of Prosthodontics, Department of Dentistry, College of Medicine, University of Ulsan, Seoul, Republic of Korea.
  • 3Divison of Prosthodontics, Department of Dentistry, College of Medicine, University of Ulsan, Asan Medical Center, Seoul, Republic of Korea. chahyunsuk@hanmail.net
  • 4Division of Oral and maxillofacial Surgery, Department of Dentistry, College of Medicine, University of Ulsan, Asan Medical Center, Seoul, Republic of Korea.
  • 5Division of Prosthodontics, Department of Restorative Science, Herman Ostrow School of Dentistry of USC, University of Southern California, Los Angeles, California, USA.

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℃ 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).
CONCLUSION
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.

Keyword

Fiber post; Hydrogen peroxide; Silane; Heat treatment; Shear strength

MeSH Terms

Cementation
Hot Temperature*
Hydrogen Peroxide*
Hydrogen*
Microscopy, Electron, Scanning
Resin Cements*
Shear Strength
Water
Hydrogen
Hydrogen Peroxide
Resin Cements
Water

Figure

  • Fig. 1 The schematic drawings of specimens. (A) the specimen before bonding procedure, (B) the specimen after surface treatment and bonding procedure.

  • Fig. 2 Shear bond strength test using a universal testing machine. (A) Frontal view, (B) lateral view.

  • Fig. 3 Box plot of shear bond strength for each group. Significant differences between mean values were denoted by *(P < .05).

  • Fig. 4 The surface topography of the fractured surface using SEM. (A, B) SEM images from group 1 (magnification of ×500 and ×1500, respectively), (C, D) SEM images from group 2, (E, F) SEM images from group 3, (G, H) SEM images from group 4.


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