J Korean Acad Prosthodont.  2021 Apr;59(2):153-163. 10.4047/jkap.2021.59.2.153.

Comparison of shear bond strength according to various surface treatment methods of zirconia and resin cement types

Affiliations
  • 1Research and Development Institute, PNUADD Co., Ltd., Busan, Republic of Korea
  • 2DMAX Co. Ltd., Gwangju, Republic of Korea
  • 3Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, School of Dentistry, Pusan National University, Yangsan, Republic of Korea

Abstract

Purpose
The aim of this study was to evaluate the effects of four surface treatment methods to improve zirconia roughness and three types of resin cement on the shear bond strength (SBS).
Materials and methods
A total of 120 zirconia blocks were randomly divided into four surface treatments: non-treatment (Control), airborne-particle abrasion (APA) with 50 μm Al2O3 (APA50), APA with 125 μm Al2O3(APA125), and ZrO2 slurry (ZA). Three resin cements (Panavia F 2.0, Superbond C&B, and Variolink N) were applied to the surface-treated zirconia specimens. All specimens were subjected to SBS testing using a universal testing machine. The surface of the representative specimens of each group was observed by scanning electron microscope (SEM). SBS data were analyzed with oneway ANOVA, two-way ANOVA test and post-hoc Tukey HSD Test (α=.05).
Results
In the surface treatment method, APA125, APA50, ZA, and Control showed high shear bond strength in order, but there was no significant difference between APA125 and APA50 (P >.05). Also, ZA showed significantly higher shear bond strength than Control (P <.05). In the resin cement type, Panavia F 2.0, Superbond C&B, and Variolink N showed significantly higher shear bond strength in order (P <.05). In SEM images, the zirconia surfaces of the APA50 and APA125 showed quite rough and irregular shapes, and the zirconia surface of the ZA was observed small irregular porosity and rough surfaces.
Conclusion
APA and ZrO 2 slurry were enhanced the surface roughness of zirconia, and Panavia F 2.0 containing MDP showed the highest shear bond strength with zirconia.

Keyword

Resin cement; Shear bond strength; Surface treatment; Zirconia
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