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

• Published in: The journal of advanced prosthodontics Vol. 9; no. 2; pp. 130 - 137
• Main Authors: Lee, Jung-Jin, Choi, Jung-Yun, Seo, Jae-Min
• Format: Journal Article
• Language: English
• Published: Korea (South) The Korean Academy of Prosthodontics 01.04.2017; 대한치과보철학회
• Subjects: Original; 치의학; Alumina coating; Resin cement; Zirconia; Airborne particles abrasion; Shear bond strength
• ISSN: 2005-7806; 2005-7814
• DOI: 10.4047/jap.2017.9.2.130

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. 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 ( <.05). To confirm the correlation of surface treatment and failure mode, the Chi-square test was used. 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. 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.