牙科汞合金的体外腐蚀

In vitro tarnish of dental amalgams.

Vaidyanathan T K, Gowda R, Schulman A

J Prosthet Dent. 1981 Jan;45(1):63-73. doi: 10.1016/0022-3913(81)90014-7.

Abstract

Tuccillo-Nielsen tarnish test in an effective screening device for dental amalgams. 2. The gamma phase appears to be more tarnish prone in conventional dental amalgams than gamma 1 phase. Although gamma 2 appeared to be tarnish prone, it was difficult to discriminate this phase because of the porosity in the amalgams. 3. The copper-rich phases are the most tarnish prone in high-copper amalgams. Gross examinations of amalgam from additive systems show spotty tarnish, whereas more uniform tarnish appearance is observed in amalgams from single-composition alloys. 4. The amalgams can be graded for in vitro tarnish performance in selected groups like the additive systems and the single-composition alloys.

摘要

图西洛 - 尼尔森变色试验是一种用于牙科汞合金的有效筛选装置。2. 在传统牙科汞合金中，γ相似乎比γ1相更容易变色。虽然γ2相似乎容易变色，但由于汞合金中的孔隙率，很难区分这一相。3. 在高铜汞合金中，富铜相最容易变色。对添加系统的汞合金进行肉眼检查显示有斑点状变色，而在单成分合金的汞合金中观察到更均匀的变色外观。4. 可以对汞合金在选定的组（如添加系统和单成分合金）中的体外变色性能进行分级。