Abstract
An optical microscopic observation, an electron microscopic observation and a measurement of weight change were performed on the dental base alloy with the composition of Ag-8wt.% Cu which were immersed in the Hanks' solution and in the Eagle's MEM.In the Hanks' solution AgCl was precipitated on the surface and an weight of the specimen was increased.For the specimen immersed in the Eagle's MEM, on the other hand, the weight was decreased and the precipitation was determined to be Ag5P2O6N.Structural feature of each specimen did affected both on the amount of weight change and on the morphology of the precipitation.
