摘要
目的：评价不同烘烤温度下铸造镍铬合金后，钛接圈内层污染及成分扩散程度。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，在基托上固定纯钛接圈，常规制作桥架蜡型，使桥架接圈周围嵌体厚度为１ｍｍ，常规内外层包埋，放置２４ｈ后，分４组不同温度烘烤：ａ组升温至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，喷砂打磨将有钛接圈部位制作金相试件，进行电镜、能谱分析。结果：不同烘烤钛接圈温度熔合镍铬合金均存在钛接圈内表面污染，有包埋料成份，也有镍铬合金成份，范围达０．６ｍｍ。结论：烘烤温度在６５０℃－７００℃时，钛接圈内层包埋料污染程度相对较小。
Objective: To study the effects of different elevating temperature for cast Ni-Cr alloy on the pollution of the inner layer titanium cylinder. Methods: Scanning electron microscopy and energy dispersive spectrocopy were employed to observe the inner layer of titanium cylinder after elevation at 600℃, 650℃, 700℃ and 800℃ respectively.Results: Pollution of the inner layer titanium cylinder was observed after elevation at 600℃ or 800℃, however less pollution was found after 650℃ or 700℃ elevatton. Conclusion: 650℃ or 700℃ elevation for cast Ni Cr alloy may be suitable for reducing the pollution of inner layer of titanium cylinder.
出处
《实用口腔医学杂志》
CAS
CSCD
北大核心
1998年第1期51-53,共3页
Journal of Practical Stomatology
