Evaluation of the Bond Strengths Between Dental Ceramics and Co-Cr Frameworks Made with Digital and Conventional Techniques.

Carlo Monaco, Martina Bonvicini, Adolfo Di Fiore, Davide Silvestri, Antonio Arena, Ugo Consolo, Francesca Zicari
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Abstract

Purpose: Evaluate the influence of different Co-Cr framework manufacturing techniques on the bond strength between metal and two types of veneering ceramic with and without a metal primer.

Materials and methods: 72 metal specimens were fabricated using the same Co-Cr alloy (Keramit NP; Nobil Metal) with three different techniques: ingots for casting (Keramit NP); disks for CAD/CAM milling (Synergy Drive Keramit NP); and powder for SLM (Keramit NP-S). Each of the 24-specimen groups, was divided into two subgroups, according to the application, or not, of Nobil Metal Bonding (NMB) (Nobil Metal). Two different veneering ceramic systems were used: Ceramco iC (Dentsply) and Noritake super porcelain EX-3 (Noritake). The bond strength of the metal-ceramic system was evaluated using the three-point bending test and the modality of failure with SEM analysis. Three-way Anova with interactions was used to evaluate the influence of the metal production process, the presence or absence of the bonding agent and the type of veneering ceramic on ceramic-metal adhesion.

Results: All specimens exceeded the minimum bond strength of 25 MPa required by ISO Standard 9693 - 1:2012. The highest values of adhesion were registered for specimens manufactured with casted metal/Noritake veneering ceramic (40.59 ± 7.30 MPa). The lowest values were registered for specimens manufactured with CAD/CAM metal/NMB/Ceramco iC veneering ceramic (29.47 ± 3.38 MPa).

Conclusions: The fabrication method and the type of veneering ceramic had a significant influence on the mean bond strength. The application of the NMB did not show an influence on bond strength.

牙科陶瓷与钴铬合金框架之间的粘结强度评估(数字与传统技术
材料和方法:使用相同的 Co-Cr 合金(Keramit NP;Nobil Metal),采用三种不同的技术制造 72 个金属试样:铸造用铸锭(Keramit NP);CAD/CAM 铣削用圆盘(Synergy Drive Keramit NP);SLM 用粉末(Keramit NP-S)。根据是否使用 Nobil Metal Bonding (NMB)(Nobil 金属),24 个试样组中的每一组又分为两个子组。使用了两种不同的贴面陶瓷系统:Ceramco iC (Dentsply) 和 Noritake 超瓷 EX-3 (Noritake)。使用三点弯曲试验评估了金属陶瓷系统的粘接强度,并通过 SEM 分析评估了破坏模式。采用交互作用三向 Anova 法评估金属生产工艺、粘接剂的有无以及贴面陶瓷的类型对陶瓷-金属粘接性的影响:所有试样都超过了 ISO 标准 9693 - 1:2012 规定的 25 兆帕最低粘接强度。使用铸造金属/Noritake 贴面陶瓷制造的试样粘附力值最高(40.59 ± 7.30 兆帕)。使用 CAD/CAM 金属/NMB/Ceramco iC 贴面陶瓷制作的试样附着力值最低(29.47 ± 3.38 兆帕):结论:制作方法和贴面陶瓷的类型对平均粘接强度有显著影响。结论:制作方法和贴面陶瓷的类型对平均粘接强度有很大影响,而 NMB 的应用对粘接强度没有影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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