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首页> 外文期刊>Biomedizinische Technik >Influence of a bonding agent on the bond strength between a dental Co-Cr alloy and nine different veneering porcelains
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Influence of a bonding agent on the bond strength between a dental Co-Cr alloy and nine different veneering porcelains

机译：粘结剂对牙科用钴铬合金与九种不同饰面瓷器之间粘结强度的影响

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摘要

Adequate bonding between dental veneering porcelains and non-precious metal alloys is a main factor for the long-term functionality of porcelain fused to metal restorations. Although a huge number of veneering porcelains are on the market, only few studies have reported about the role of bonding agents for the bond strength at their respective interface to cobalt-chromium (Co-Cr). The aim of this study was to compare the influence of a metal-ceramic bonding agent for Co-Cr alloys on the bond strength of metal-ceramic systems. The bond strength test was done according to ISO 9693 with additional detection of the first acoustic crack initiated signal while testing. The bonding agent had only minor effects on the bond strength of the different Co-Cr/ceramic systems. Only three of the nine studied systems showed statistically significant differences (p< 0.05) upon applying the bonding agent. Scanning electron microscopy (SEM) showed cracks predominantly caused by adhesive failure. Based on this study, Co-Cr alloys veneered with porcelains with and without a bonding agent exceeded the minimum bond strength of 25 MPa required according to ISO 9693. However, if bond strength values based on acoustic signals were calculated, values below the threshold of 25 MPa could be observed. Such findings are important for failures caused by the occurrence of early cracks.
机译：牙贴面瓷器与非贵金属合金之间的充分结合是与金属修复体融合的瓷器的长期功能的主要因素。尽管市场上有大量的贴面瓷器，但只有很少的研究报道了粘合剂对钴铬合金（Co-Cr）界面强度的作用。这项研究的目的是比较Co-Cr合金的金属陶瓷结合剂对金属陶瓷体系结合强度的影响。根据ISO 9693进行粘合强度测试，并在测试时另外检测到第一个声裂纹引发的信号。粘合剂对不同的Co-Cr /陶瓷体系的粘合强度影响很小。在使用粘合剂的情况下，九种研究体系中只有三种显示出统计学上的显着差异（p <0.05）。扫描电子显微镜（SEM）显示的裂纹主要是由粘合失败引起的。根据这项研究，单板含或不含粘结剂的烤瓷钴铬合金超过了根据ISO 9693要求的25 MPa的最小粘结强度。但是，如果根据声信号计算出粘结强度值，则该值低于阈值。可以观察到25 MPa。这些发现对于因早期裂纹的发生而导致的故障很重要。

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