Scolaro Juliano Milczewsky, Pereira Jefferson Ricardo, do Valle Accácio Lins, Bonfante Gerson, Pegoraro Luiz Fernando
Department of Prosthodontics, Paulista University, Goiânia, GO, Brazil.
Braz Dent J. 2007;18(3):240-3. doi: 10.1590/s0103-64402007000300012.
Dentists and technicians have used dental ceramics associated with different types of alloys without taking into account the characteristics of compatibility of these materials. Knowing the properties of the alloy and ceramic used in metal/ceramic restorations is a key factor for treatment success. The purpose of this study was to evaluate the bond strength of a palladium-silver alloy (Pors-on 4) to 3 ceramics (Ceramco, Noritake and Vita VMK-68) using shear forces at the metal-ceramic interface. A stainless steel cylindrical matrix was used for preparation of the metal dies, application of ceramic and shear strength testing. Thirty palladium-silver alloy cylinders received two layers of opaque and two layers of body porcelain, and shear tests were performed in a universal testing machine at a cross-head speed of 0.5 mm/min. Shear bond strength means (in MPa) were: 28.21(Ceramco), 28.96 (Noritake) and 24.11 (Vita VMK-68). One-way ANOVA did not show statistically significant differences (p>0.05) among the materials. The results of this study indicate that the three evaluated ceramic systems are suitable to be used in combination with the tested palladium-silver alloy.
牙医和技术人员在使用与不同类型合金相关的牙科陶瓷时，并未考虑这些材料的兼容性特点。了解金属/陶瓷修复体中所使用合金和陶瓷的特性是治疗成功的关键因素。本研究的目的是使用金属-陶瓷界面处的剪切力来评估钯银合金（Pors-on 4）与三种陶瓷（Ceramco、Noritake和Vita VMK - 68）之间的粘结强度。使用不锈钢圆柱形模具来制备金属铸模、施加陶瓷以及进行剪切强度测试。三十个钯银合金圆柱体接受了两层不透明瓷和两层体瓷，并在万能试验机上以0.5毫米/分钟的十字头速度进行剪切测试。剪切粘结强度平均值（以兆帕为单位）分别为：28.21（Ceramco）、28.96（Noritake）和24.11（Vita VMK - 68）。单向方差分析表明，这些材料之间在统计学上没有显著差异（p>0.05）。本研究结果表明，所评估的三种陶瓷体系适用于与测试的钯银合金联合使用。
