Abstract

Objective

The strong bond strength (SBS) between metal and ceramic is crucial to the success and longevity of metal-ceramic restorations. Therefore, this study aimed to determine the SBS between ceramic and cobalt-chromium (Co-Cr) alloys produced by different methods, treated with sandblasting, and four different grinding procedures.

Materials and methods

A total of one hundred and fifty Co-Cr samples were produced, including fifty samples from each group using casting, laser sintering, and milling techniques. The produced samples were divided into five subgroups according to their main groups. The sample groups were ground in one direction with a sintered diamond bur, carbide bur, pink stone, carbon separating disc, and the other group was sandblasted with 110 μm Al₂O₃. After surface treatments, an SBS test was performed, and the data were analyzed by one-way statistical analysis of variance (ANOVA) and Tukey HSD comparison test (p > .05). Surface characterizations of Co-Cr alloys were also examined with digital microscopy after debonding.

Results

There was a statistical difference between the laser sintering and milling groups compared to the fabrication techniques. While the highest SBS value was determined in milling groups (16.85 ± 2.63) with Al₂O₃ sandblasting, the lowest was found in the casting group (8.97 ± 3.35) with Al₂O₃ sandblasting. The use of abrasive burs with different surface properties and sandblasting used in metal leveling and finishing surface preparation significantly changes the ceramic's adhesion to the metal surface.

中文翻译：

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不同磨削方式对金属陶瓷结合力的影响

摘要

客观的

金属和陶瓷之间的强结合强度 (SBS) 对于金属陶瓷修复体的成功和使用寿命至关重要。因此，本研究旨在确定通过不同方法、喷砂处理和四种不同研磨程序生产的陶瓷和钴铬 (Co-Cr) 合金之间的 SBS。

材料和方法

总共生产了 150 个 Co-Cr 样品，其中包括每组使用铸造、激光烧结和铣削技术的 50 个样品。生产的样品根据其主要组分为五个子组。样品组用烧结金刚石车针、硬质合金车针、粉红石、碳分离盘在一个方向研磨，另一组用110μm Al ₂ O ₃喷砂。表面处理后进行SBS检验，数据采用单因素方差分析（ANOVA）和Tukey HSD比较检验（p  >.05）。Co-Cr 合金的表面特征也在脱粘后用数字显微镜检查。

结果

与制造技术相比，激光烧结组和铣削组之间存在统计学差异。最高的 SBS 值是在采用 Al 2 O 3 喷砂的铣削组 (16.85 ± 2.63) 中确定的，而在采用 Al ₂ O _3喷砂的_铸造组中发现的 SBS 值最低 (8.97 ± 3.35) 。在金属整平和表面处理中使用具有不同表面特性的研磨车针和喷砂显着改变了陶瓷对金属表面的附着力。