不同热处理条件对钴铬合金金瓷结合强度的影响  

Effect of different heat treatment on the bonding strength of porcelain and Co-Cr alloy

作　　者：廖隽琨[1] 叶剑涛[1] 朱峰[2] 张翠翠[1] 温小姗[1] 张艺萍[1] 李博华[1] 

机构地区：[1]中山大学孙逸仙纪念医院口腔科．广东广州510120 [2]广州有色金属研究院分析测试中心,广东广州510651

出　　处：《上海口腔医学》2011年第6期567-571,共5页Shanghai Journal of Stomatology

基　　金：广东省科技计划项目(2006B36006016);广州市科技计划项目(2005Z3-E0531)

摘　　要：目的:探讨不同热处理条件对钴铬合金金瓷结合强度和金瓷界面微观结构的影响。方法:依据ISO9693标准,制作30个钴铬合金样本,根据热处理条件分为3组(n=10)。A组——除气,980℃维持60s;B组——除气,980℃维持60s,解除真空,继续高温维持60s;C组——除气,980℃维持120s。采用三点弯曲法测试样本的金瓷结合强度。同法制作3组样本,每组2个,用扫描电镜和X射线衍射进行金瓷界面分析。采用SPSS13.0软件包对数据进行统计学分析。结果:金瓷结合强度分别为A组(39.03±2.70)MPa,B组(34.43±2.36)MPa,C组(31.65±1.49)MPa,其中,A、B组,A、C组,B、C组之间的差异显著(P<0.05)。扫描电镜观察,A组过渡层约12.3～16.4μm,B组过渡层约15.2～21.8μm,C组过渡层约26.3～32.2μm。结论:钴铬合金除气,并在980℃中维持60s,能获得较高的金瓷结合强度。延长除气时高温维持时间和除气后增加预氧化,将使金瓷结合强度降低。PURPOSE：To investigate and compare the effect of different heat treatment on the metal-ceramic bonding strength and the interfacial microstructure of the Co-Cr alloy.METHODS： Thirty specimens were made according to ISO 9693,and then divided into 3 groups（n=10） through the measurements.Group A（degassed 60s）：degassed and then maintained 60s in 980℃;Group B（degassed 60s and preoxidation 60s）： degassed and maintained 60s in 980℃,then were maintained continuously for 60s in 980℃ after re-gassed;Group C（degassed 120s）： degassed and maintained 120s in 980℃.The bonding strengths of the three groups were evaluated through three point bending test.Six specimens divided into 3 group were made in the same method to observe the metal-ceramic interface through scanning electronic microscope（SEM） and energy dispersive spectrum（EDS）.The bonding strength data were analyzed using ANOVA and Bonferroni＇s test by SPSS13.0 software package.RESULTS： The mean value of bonding strength was（39.03±2.70）MPa for group A,（34.43±2.36）MPa for group B,（31.65±1.49）MPa for group C,respectively.There were significant difference between every two groups（P0.05）.SEM demonstrated that the width of interfacial transition layer was 12.3-16.4μm in group A,15.2-21.8μm in group B and 26.3-32.2μm in group C.CONCLUSIONS： Higher metal-ceramic bonding strength for Co-Cr alloy will be formed under the situation of degassed,and maintained 60s in 980℃;while extending degassed time,prolonging the heat maintained time and preoxidation after degassing will reduce metal-ceramic bonding strength.Supported by Guangdong Provincial Science and Technology Research Project（2006B36006016） and Guangzhou Municipal Science and Technology Research Project（2005Z3-E0531）.

关 键 词：钴铬合金 金属烤瓷修复体 金瓷结合 三点弯曲强度 

分 类 号：R783.1[医药卫生—口腔医学]