influence of the conditioning method for pre-sintered zirconia on the shear bond strength of bilayered porcelain/zirconia
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2016
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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.
| Reference Key |
spintzyk2016materialsinfluence
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|---|---|
| Authors | ;Sebastian Spintzyk;Kikue Yamaguchi;Tomofumi Sawada;Christine Schille;Ernst Schweizer;Masahiko Ozeki;Jürgen Geis-Gerstorfer |
| Journal | Nature Materials |
| Year | 2016 |
| DOI |
10.3390/ma9090765
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