反复熔铸对镍铬烤瓷合金硬度的影响  

Effect of Recasting on the Hardness of the Nickel-chromium Ceramic Alloy

作　　者：王颖卉[1] 连颂峰 程辉[1] 李强[3] 马守治[1] 李秀容[4] 

机构地区：[1]福建医科大学附属口腔医院修复科,福州350002 [2]厦门长庚医院口腔科,厦门362000 [3]福州大学材料学院,福州350108 [4]福建医科大学附属口腔医院技工室,福州350002

出　　处：《福建医科大学学报》2010年第3期199-201,共3页Journal of Fujian Medical University

基　　金：福建省科技攻关项目(2007Y0061);福建医科大学教授学术发展基金项目(JS08017)

摘　　要：目的研究反复熔铸对镍铬烤瓷合金硬度的影响。方法将镍铬烤瓷合金分别进行1次、2次、3次、4次真空压力铸造后,分别获得经过1～4次熔铸的合金。采用未经过熔铸的合金(新合金)及熔铸过1～4次的合金熔铸成硬度试样的铸件。硬度试样的铸件经过初步磨平、树脂镶嵌及金相抛光等处理制成硬度试件后,在显微硬度计上测试其维氏硬度值。结果与经过1次熔铸的镍铬烤瓷合金相比,经过2～5次熔铸的合金维氏硬度值没有显著差异(P>0.05)。结论镍铬烤瓷合金至少可以重复熔铸5次而不引起硬度下降。Objective To study the effect of recasting on the hardness of the nickel-chromium ceramic alloy.Methods The recast nickel-chromium ceramic alloys were respectively obtained by recasting the nickel-chromium alloy in pressure casting condition for once,twice,3 times and 4 times.The recast alloys were respectively cast with uncast alloys（new alloys） to produce specimens for hardness testing.The hardness specimens were measured for Vickers hardness in a microhardness tester after initial grounding,resin inlay,and metallographic polishing.Results On the basis of their Vickers hardness,there was no significant difference between the alloys recast for 2～5 times and those cast for once（P0.05）.Conclusion The nickel-chromium ceramic alloy can be recast for at least 5 times without impairing its hardness.

关 键 词：铬合金 镍 金属烤瓷合金 牙科铸造技术 硬度 

分 类 号：R783.1[医药卫生—口腔医学] R783.2[医药卫生—临床医学]