J Adv Prosthodont.  2017 Apr;9(2):130-137. 10.4047/jap.2017.9.2.130.

Influence of nano-structured alumina coating on shear bond strength between Y-TZP ceramic and various dual-cured resin cements

• Lee JJ
• Choi JY
• Seo JM

• KMID: 2376301
• DOI: http://doi.org/10.4047/jap.2017.9.2.130

Abstract

PURPOSE
The purpose of this study was to evaluate the effect of nano-structured alumina surface coating on shear bond strength between Y-TZP ceramic and various dual-cured resin cements.
MATERIALS AND METHODS
A total of 90 disk-shaped zirconia specimens (HASS CO., Gangneung, Korea) were divided into three groups by surface treatment method: (1) airborne particle abrasion, (2) tribochemicalsilica coating, and (3) nano-structured alumina coating. Each group was categorized into three subgroups of ten specimens and bonded with three different types of dual-cured resin cements. After thermocycling, shear bond strength was measured and failure modes were observed through FE-SEM. Two-way ANOVA and the Tukey's HSD test were performed to determine the effects of surface treatment method and type of cement on bond strength (P<.05). To confirm the correlation of surface treatment and failure mode, the Chi-square test was used.
RESULTS
Groups treated with the nanostructured alumina coating showed significantly higher shear bond strength compared to other groups treated with airborne particle abrasion or tribochemical silica coating. Clearfil SA Luting showed a significantly higher shear bond strength compared to RelyX ARC and RelyX Unicem. The cohesive failure mode was observed to be dominant in the groups treated with nano-structured alumina coating, while the adhesive failure mode was prevalent in the groups treated with either airborne particle abrasion or tribochemical silica coating.
CONCLUSION
Nano-structured alumina coating is an effective zirconia surface treatment method for enhancing the bond strength between Y-TZP ceramic and various dual-cured resin cements.

Keyword

Airborne particles abrasion; Shear bond strength; Zirconia; Alumina coating; Resin cement

MeSH Terms

Adhesives
Aluminum Oxide*
Ceramics*
Gangwon-do
Methods
Resin Cements*
Silicon Dioxide
Adhesives
Aluminum Oxide
Resin Cements
Silicon Dioxide

Figure

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  Fig. 1 Diagram of bonded specimen.

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  Fig. 2 Mean shear bond strength values for each experimental group (P < .05). Different superscript letters indicate statistically significant differences.

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  Fig. 3 (A) FE-SEM image showing the airborne particle abraded Y-TZP ceramic surface, (B) FE-SEM image showing the surface of Y-TZP ceramic after tribochemical silica coating.

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  Fig. 4 (A) FE-SEM image showing the nano-structured alumina coating, (B) higher magnification FE-SEM image showing the nano-structured alumina coating.

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  Fig. 5 FE-SEM image showing a section of nano-structured alumina coated Y-TZP ceramic.

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  Fig. 6 FE-SEM images and dominant failure modes of specimens after measuring shear bond strength. Failure mode is described below the figures.

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  Fig. 7 Alumina coating covered by resin cement is shown more clearly in ×50,000 magnified image.

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