蠕变、γ2与银汞合金边缘断裂之间的关系。

Relationship between creep, gamma 2, and marginal fracture of dental amalgams.

作者信息

Sarkar N K, Eyer C S, Norling B K

出版信息

J Oral Rehabil. 1983 Nov;10(6):489-94. doi: 10.1111/j.1365-2842.1983.tb01472.x.

DOI:10.1111/j.1365-2842.1983.tb01472.x

Abstract

The effect of gamma 1 and gamma 2 on the creep deformation of dental amalgams has been investigated. It has been shown that the creep of a conventional amalgam is not dependent on gamma 1 as was previously reported. Rather it is strongly influenced by gamma 2 and its volume fraction. It has been speculated that Sn-rich grain boundaries also enhance creep by facilitating grain boundary sliding. The reported correlation between creep and marginal fracture has been explained in terms of this dependence of creep on corrosion-prone Sn-rich microstructural constituents of amalgams.

摘要

已对γ1和γ2对牙科汞合金蠕变变形的影响进行了研究。结果表明，传统汞合金的蠕变并不像先前报道的那样依赖于γ1。相反，它受到γ2及其体积分数的强烈影响。据推测，富含锡的晶界也通过促进晶界滑动来增强蠕变。根据蠕变对汞合金中易腐蚀的富含锡的微观结构成分的这种依赖性，解释了所报道的蠕变与边缘断裂之间的相关性。