Effect of zirconia type on its bond strength with different veneer ceramics.
Effect of zirconia type on its bond strength with different veneer ceramics.
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DOI：
10.1111/j.1532-849x.2008.00306.x
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发表时间：
2008-07-01
期刊：
影响因子：
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通讯作者：
Feilzer, Albert J
中科院分区：
文献类型：
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作者：
Aboushelib, Moustafa N;Kleverlaan, Cornelis J;Feilzer, Albert J
目的：在层状结构中，陶瓷贴面与氧化锆骨架之间的结合强度是最弱的。这种结合被证明对框架材料的表面光洁度和贴面陶瓷的类型及其应用方法很敏感。新的彩色氧化锆框架被引入，以增强分层全陶瓷修复的最终美学。本研究的目的是探讨氧化锆类型，白色或彩色，其表面光洁度对两种贴面陶瓷结合强度的影响。材料和方法：五种商业氧化锆框架材料（Cercon白色和黄色，Lava白色和黄色，Procera氧化锆）接受以下表面处理中的任何一种：CAD/CAM铣床表面，空气颗粒磨损和内衬应用。两种贴面陶瓷被用于贴面：Noble Rondo和Ceram Express。将盘状层状试样切成微条，进行微拉伸粘结强度（MTBS）测试。利用扫描电子显微镜（SEM）和能量色散分析评估了白色和彩色框架之间的结构和化学差异。采用双因素方差分析和Tukey事后检验对数据进行分析（p < 0.05）。结果：氧化锆框架类型对牙芯-贴面结合强度有显著影响，且与材料有关。与白色氧化锆骨架相比，有色氧化锆骨架的结合强度明显弱。根据氧化锆材料的不同，不同的表面处理对芯-单板结合强度有不同的影响。虽然检测的氧化锆材料之间没有发现明显的化学差异，但存在结构差异，特别是白色氧化锆和彩色氧化锆之间以及不同制造商的不同氧化锆框架之间的结构差异，这显著影响了芯-单板结合强度值。结论：氧化锆框架中添加着色色素后，其结构发生改变，贴面前需要进行不同的表面处理。为了防止氧化锆贴面修复体的分层和切屑失败，除了适当的表面处理外，还要仔细选择框架和贴面陶瓷材料，以保持良好的结合强度。
PURPOSE: The bond strength between veneer ceramic and the zirconia framework is the weakest component in the layered structure. This bond was proven to be sensitive to the surface finish of the framework material and to the type of the veneer ceramic and its method of application. New colored zirconia frameworks were introduced to enhance the final esthetics of the layered all-ceramic restoration. The aim of this study was to investigate the effect of zirconia type, white or colored, and its surface finish on the bond strength to two veneer ceramics.MATERIALS AND METHODS: Five commercial zirconia framework materials (Cercon white and yellow, Lava white and yellow, Procera zirconia) received either of the following surface treatments: CAD/CAM milled surface, airborne-particle abrasion, and liner application. Two veneering ceramics were used to veneer the specimens: Noble Rondo and Ceram Express. The disc-shaped layered specimens were cut into microbars, and microtensile bond strength (MTBS) test was conducted. Structural and chemical differences between the white and colored frameworks were evaluated using scanning electron microscopy (SEM) and energy dispersive analysis. Two-way ANOVA and Tukey post hoc tests were used to analyze the data (p < 0.05 was considered significant).RESULTS: The type of zirconia framework had a significant effect on the core-veneer bond strength, which was material dependent. The bond strength to colored zirconia was significantly weaker compared to white zirconia frameworks. Different surface treatments had different effects on the core-veneer bond strength according to the zirconia material used. Although no marked chemical differences between the examined zirconia materials could be found, there were structural differences, especially between white and colored zirconia and for different zirconia frameworks of different manufacturers, which significantly affected core-veneer bond strength values.CONCLUSION: The addition of coloring pigments to zirconia frameworks resulted in structural changes that require different surface treatment before veneering. To prevent delamination and chipping failures of zirconia veneered restorations, careful selection of both framework and veneer ceramic materials, in addition to proper surface treatment, are essential for maintaining good bond strength.