中国实用口腔科杂志

中国实用口腔科杂志 ›› 2012, Vol. 5 ›› Issue (06): 354-357.

• 论著 • 上一篇    下一篇

钯银合金与钴铬合金的机械性能及金瓷结合强度比较研究

  

  1. 1.中国医科大学口腔医学院修复科，沈阳  110002；2.辽宁省口腔医学研究所口腔修复学研究室，沈阳  110002
  • 收稿日期:2012-03-15 修回日期:2012-05-25 出版日期:2012-06-15 发布日期:2012-07-20

  • Received:2012-03-15 Revised:2012-05-25 Online:2012-06-15 Published:2012-07-20

摘要： 目的    对比钯银（Pd-Ag）合金和钴铬（Co-Cr）合金的机械性能及金瓷结合强度，为临床提供基础数据。 方法    本研究于2010年12月至2011年2月在中国科学院金属研究所分析测试部完成。常规方法制作Pd-Ag合金和Co-Cr合金试件，首先对二者进行硬度测试和拉伸测试，然后分别行常规烤瓷并利用水平剪切法进行界面结合强度测试，利用扫描电镜（SEM）和能谱分析技术对金瓷界面进行观察和元素分析。结果    硬度：Pd-Ag合金为（187.44±3.64）HV，低于Co-Cr合金（361.53±10.15）HV（P < 0.05）。拉伸测试： Pd-Ag合金的屈服强度为（467.50±14.40）MPa，小于Co-Cr合金（568.10±30.94）MPa（P < 0.05）；Pd-Ag合金的抗拉强度为（631.83±15.51）MPa，小于Co-Cr合金（758.73±25.85）MPa（P < 0.05）。剪切强度：Pd-Ag合金为（57.67±5.44）MPa，Co-Cr合金为（26.80±4.95）MPa，差异有统计学意义（P < 0.05）。扫描电镜观察和能谱分析显示：2种合金与瓷之间均存在过渡层，合金与瓷层间存在元素的相互渗透。结论    Pd-Ag合金的机械性能低于Co-Cr合金，但可满足临床需要；而Pd-Ag合金的金瓷结合强度高于Co-Cr合金。

关键词: 钯银合金, 钴铬合金, 机械性能, 金瓷结合强度

Abstract: Objective    To compare mechanical properties and porcelain bonded strength between Pd-Ag and Co-Cr dental alloys. Methods    Hardness test and tensile test were used to evaluate mechanical properties of Pd-Ag and Co-Cr dental alloys. Porcelain bonded strength of these two alloys was estimated by shearing test. Bonding interfaces of the metal-ceramic specimens were studied by scanning electron microscopy （SEM） and energy dispersive X-ray spectroscopy （EDS）. Results    The hardness of  Pd-Ag group was （187.44±3.64）HV，while （361.53±10.15）HV in Co-Cr group. The yield strength of  Pd-Ag group was （467.50±14.40） MPa，while （568.10±30.94） MPa in Co-Cr group. The tensile strength of Pd-Ag group was （631.83±15.51）MPa，while （758.73±25.85） MPa in Co-Cr group. The porcelain bonded strength of Pd-Ag group was （57.67±5.44） MPa，while （26.80±4.95） MPa in Co-Cr group. Yield strength， tensile strength and porcelain bonded strength were significantly different between these two groups （P < 0.05）.  Results from SEM and EDS revealed that there was an intermediate layer between dental alloy and porcelain in each group. Conclusion    Mechanical properties of Pd-Ag dental alloy are inferior to Co-Cr dental alloy，but they can meet the requirements of clinical use. Porcelain bonded strength of Pd-Ag dental alloy is higher than that of Co-Cr dental alloy.

Key words: palladium-silver alloy, cobalt-chromium alloy, mechanical properties, porcelain bonded strength