钛接圈在不同烘烤温度下对镍铬合金浇注质量的影响  

The effects of different elevating temperature for titanium cylinder on the properties of Ni-Cr alloy bar

作　　者：宋应亮[1,2] 徐君伍[1,2] 马轩祥 刘守智[1,2] 林升 刘金利[1,2] 

机构地区：[1]第四军医大学口腔医学院修复科 [2]西安理工大学金相学教研室

出　　处：《实用口腔医学杂志》1998年第1期54-55,共2页Journal of Practical Stomatology

摘　　要：目的：研究钛接圈在不同烘烤温度下浇注镍铬合金的质量关系。方法：选择临床骨融合种植义齿二期手术后典型病例石膏模型，在基桩上固定纯钛接圈，常规制作桥架蜡型，使桥架接圈周围嵌体蜡厚度为１ｍｍ，常规内、外包埋，放置２４ｈ后，分４组不同温度烘烤，ａ组烘烤升温至６００℃，ｂ组升温至６５０℃，ｃ组升温至７００℃，ｄ组升温至８００℃。每组试件１０个，共４０个试件。用远红外温度测试仪控制合金浇注温度为１３０６℃，自然冷却后，电镜观察。结果：钛接圈烘烤温度６００℃、８００℃时镍铬合金支架断口出现二次断裂及气孔机会多，当６５０℃、７００℃时二次断裂出现机会少。结论：在常规牙科操作中，钛接圈烘烤温度为６５０℃、７００℃时，浇注镍铬合金较好。Objective: To study the effects of different elevating temperature for titauium cylinder on the properties of Ni-Cr alloy bar.Methods:Scanning electron microscopy was employed to observe the breacking of Ni-Cr allay bar after titanium cylinders had been elevated at 600℃, 650℃, 700℃ and 800℃ respectively. Results: Porosity and elongated wrongh microstructure were observed after titanium cylinders elevation at 600℃ or 800℃, however less porosity and less wrongh microstructure were found after 650℃ or 700℃ elevation. Conclusion: 650℃ or 700℃ elevation for titanium cylinder may be suitable for the required properties of the Ni-Cr alloy bar.

关 键 词：钛 接圈 烘烤温度 牙科材料 浇注 

分 类 号：R783.2[医药卫生—口腔医学]