除气和预氧化对钯银合金金瓷结合强度的影响  

The effect of degassing and peroxidation on the metal-ceramic bonding strength of Pd-Ag alloy

作　　者：李博华[1] 叶剑涛[2] 王永功[1] 闫德民[1] 王买全[1] 侯明[1] 

机构地区：[1]河南省人民医院口腔科,郑州450000 [2]中山大学孙逸仙纪念医院口腔科

出　　处：《实用口腔医学杂志》2015年第2期200-204,共5页Journal of Practical Stomatology

摘　　要：目的:研究上瓷前不同预处理条件对钯银合金金瓷结合强度的影响。方法:用扫描电镜(SEM)和X线衍射(EDS)分析A组(预氧化)、B组(除气)的金属表面以及金瓷结合界面,用ISO9693规定的三点弯曲测试分别测定试件的金瓷结合强度。结果:扫描电镜和X射线衍射:2组金属试件预处理后表面均可见突起的小瘤状结构,A组试件的小瘤较多、密度较大,大部分融合成条状、片状;B组试件的小瘤较少、密度较小,圆形颗粒状,直径约为1.5μm左右。2组试件金瓷结合界面均有清晰的含有较多颗粒状物的过渡瓷层,金瓷结合紧密。A组和B组金瓷结合强度分别为(45.97±3.92)MPa和(49.11±6.42)MPa(P=0.031)。结论:钯银合金除气比预氧化可以获得较高的金瓷结合强度。Objective：To investigate the effect of degassing and peroxidation on metal-ceramic bonding strength of Pd-Ag alloy. Methods：The metal-ceramic interface of group A （peroxidation）and B （degassing）was investigated under scanning electronic micro-scope（SEM）and energy dispersive spectrum （EDS）.The bond strength between metal and ceramics was measured using a three-point bend test according to ISO9693.Results：The formation of nodules on the surface of alloy specimens was observed in both groups by SEM.The nodules on the specimens of group A were more densely than those of group B.The diameter of nodules in group B was 1 .5μm approximately.The interface of the metal-ceramic specimens had a clear transition porcelain layer and no hole or slit was present. The mean bonding strength of group A and B was （45.97 ±3.92）MPa and （49.1 1 ±6.42）MPa respectively（P=0.031 ）.Conclu-sion：Degassing can improve metal-ceramic bonding strength of Pd-Ag alloy significantly.

关 键 词：钯银合金 除气 预氧化 金瓷结合强度 

分 类 号：R783.1[医药卫生—口腔医学]