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Materials 2016, 9(9), 765; doi:10.3390/ma9090765

Influence of the Conditioning Method for Pre-Sintered Zirconia on the Shear Bond Strength of Bilayered Porcelain/Zirconia

1
Section Medical Materials Science & Technology, University Hospital Tübingen, Osiander Strasse 2-8, Tübingen 72076, Germany
2
Department of Implant Dentistry, Showa University School of Dentistry, 2-1-1 Kitasenzoku, Ota-ku, Tokyo 145-8515, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Jorge de Brito
Received: 3 August 2016 / Revised: 25 August 2016 / Accepted: 2 September 2016 / Published: 8 September 2016
(This article belongs to the Section Biomaterials)
View Full-Text   |   Download PDF [2115 KB, uploaded 8 September 2016]   |  

Abstract

This study evaluated the bond strength of veneering porcelain with an experimental conditioner-coated zirconia. Pre-sintered Y-TZP specimens (n = 44) were divided in two groups based on conditioning type. After sintering, all sample surfaces were sandblasted and layered with veneering porcelain. Additionally, half of the specimens in each group underwent thermal cycling (10,000 cycles, 5–55 °C), and all shear bond strengths were measured. After testing, the failure mode of each fractured specimen was determined. Differences were tested by parametric and Fisher’s exact tests (α = 0.05). The differences in bond strength were not statistically significant. Adhesive fractures were dominantly observed for the non-thermal cycled specimens. After thermal cycling, the conditioner-coated group showed cohesive and mixed fractures (p = 0.0021), whereas the uncoated group showed more adhesive fractures (p = 0.0021). Conditioning of the pre-sintered Y-TZP did not change the shear bond strength of the veneering porcelain, but did improve the failure mode after thermal cycling. View Full-Text
Keywords: yttria-stabilized tetragonal zirconia polycrystal (Y-TZP); veneering porcelain; shear bond strength; pre-sintered zirconia; surface modification yttria-stabilized tetragonal zirconia polycrystal (Y-TZP); veneering porcelain; shear bond strength; pre-sintered zirconia; surface modification
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Spintzyk, S.; Yamaguchi, K.; Sawada, T.; Schille, C.; Schweizer, E.; Ozeki, M.; Geis-Gerstorfer, J. Influence of the Conditioning Method for Pre-Sintered Zirconia on the Shear Bond Strength of Bilayered Porcelain/Zirconia. Materials 2016, 9, 765.

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