Thermal expansion coefficient of titanium casting

被引：37
|
作者：
Low, D [1 ]
Sumii, T [1 ]
Swain, M [1 ]
机构：
[1] Univ Sydney, Fac Dent, Biomat Sci Res Unit, Sydney, NSW 2006, Australia
来源：
JOURNAL OF ORAL REHABILITATION | 2001年 / 28卷 / 03期
关键词：
D O I：
10.1046/j.1365-2842.2001.00664.x
中图分类号：
R78 [口腔科学];
学科分类号：
1003 ;
摘要：
A reliable measurement of the thermal expansion coefficient (alpha) value is required to achieve a positive thermal mismatch between metal and porcelain for porcelain-fused to metal crowns. Heating rate and specimen conditions may significantly influence the alpha value and the effects of these factors were studied. Commercially pure cast titanium rods,'as cast' and sandblasted, were heated at various conditions. According to this study, the discrepancy of alpha values between heating and cooling conditions was insignificant when the heating (cooling) rate was reduced to 1 degreesC min(-1). It was revealed that alpha values obtained from 1 degreesC min(-1) cooling rates should be utilized. Dental porcelain with an a value lower than 8.5 x 10(-6) degreesC will be suitable for titanium-ceramic applications.
引用
收藏
页码：239 / 242
页数：4
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