Vaidyanathan T K, Schulman A
J Biomed Mater Res. 1979 Mar;13(2):281-98. doi: 10.1002/jbm.820130209.
The in vitro deformation failure behavior of the conventional and the recent high copper dental amalgams is studied under different strain rates. The conventional silver-tin amalgams exhibited significant slow compressive flow at low strain rates, but failed catastrophically at the higher loading rates. On the other hand, amalgams containing highest copper contents showed no compressive flow and failed catastrophically at all the loading rates. The slow compressive flow in the conventional dental amalgams indicate that dislocations may play an important role in the deformation process of the amalgams at the lower strain rates.
研究了传统牙科汞合金和近期高铜牙科汞合金在不同应变速率下的体外变形失效行为。传统银锡汞合金在低应变速率下表现出显著的缓慢压缩流动，但在较高加载速率下会发生灾难性失效。另一方面，含铜量最高的汞合金在所有加载速率下均未表现出压缩流动，而是发生灾难性失效。传统牙科汞合金中的缓慢压缩流动表明，位错可能在较低应变速率下汞合金的变形过程中起重要作用。
