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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。
Objective To compare the mechanical properties and bond strength of Pd-Ag and Co-Cr alloys and provide the basic data for clinical application. Methods The study was performed from December 2010 to February 2011 at the Department of Analysis and Testing, Institute of Metal Research, Chinese Academy of Sciences. The conventional method was used to make the Pd-Ag alloy and the Co-Cr alloy specimen. The hardness and tensile tests of the two were carried out firstly. Then the conventional porcelain was measured and the interfacial bonding strength was tested by horizontal shear method. ) And energy spectrum analysis of gold porcelain interface observation and elemental analysis. Results Hardness: The Pd-Ag alloy was (187.44 ± 3.64) HV, which was lower than that of the Co-Cr alloy (361.53 ± 10.15) HV (P <0.05). Tensile test: The yield strength of Pd-Ag alloy is (467.50 ± 14.40) MPa, less than that of Co-Cr alloy (568.10 ± 30.94 MPa) (P <0.05); the tensile strength of Pd-Ag alloy is (631.83 ± 15.51) MPa, less than Co-Cr alloy (758.73 ± 25.85) MPa (P <0.05). The shear strength was (57.67 ± 5.44) MPa for Pd-Ag alloy and (26.80 ± 4.95) MPa for Co-Cr alloy, the difference was statistically significant (P <0.05). Scanning electron microscopy and energy spectrum analysis showed that there was a transition layer between the two kinds of alloys and the porcelain, and there was mutual infiltration of elements between the alloy and the porcelain layer. Conclusions The mechanical properties of Pd-Ag alloys are lower than that of Co-Cr alloys, but they meet the clinical needs. However, the bonding strength of Pd-Ag alloys is higher than that of Co-Cr alloys.