预烧结氧化锆的预处理方法对双层瓷/氧化锆剪切粘结强度的影响
Influence of the Conditioning Method for Pre-Sintered Zirconia on the Shear Bond Strength of Bilayered Porcelain/Zirconia.
作者信息
Spintzyk Sebastian, Yamaguchi Kikue, Sawada Tomofumi, Schille Christine, Schweizer Ernst, Ozeki Masahiko, Geis-Gerstorfer Jürgen
机构信息
Section Medical Materials Science & Technology, University Hospital Tübingen, Osiander Strasse 2-8, Tübingen 72076, Germany.
Department of Implant Dentistry, Showa University School of Dentistry, 2-1-1 Kitasenzoku, Ota-ku, Tokyo 145-8515, Japan.
出版信息
Materials (Basel). 2016 Sep 8;9(9):765. doi: 10.3390/ma9090765.
This study evaluated the bond strength of veneering porcelain with an experimental conditioner-coated zirconia. Pre-sintered Y-TZP specimens ( = 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 ( = 0.0021), whereas the uncoated group showed more adhesive fractures ( = 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.
本研究评估了用一种实验性调节剂涂层氧化锆制作的饰面瓷的粘结强度。将预烧结的钇稳定四方氧化锆多晶体（Y-TZP）试样（n = 44）根据处理类型分为两组。烧结后，对所有试样表面进行喷砂处理并覆盖饰面瓷。此外，每组中有一半的试样进行热循环（10000次循环，5 - 55°C），并测量所有的剪切粘结强度。测试后，确定每个断裂试样的失效模式。通过参数检验和Fisher精确检验（α = 0.05）进行差异检验。粘结强度的差异无统计学意义。对于未进行热循环的试样，主要观察到粘结性断裂。热循环后，调节剂涂层组出现内聚性和混合性断裂（P = 0.0021），而未涂层组出现更多的粘结性断裂（P = 0.0021）。预烧结Y-TZP的处理并未改变饰面瓷的剪切粘结强度，但改善了热循环后的失效模式。
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