[Comparative examination of some physical properties and structure of alloys with nickel as the matrix]

Three alloys with nickel as the matrix: "Microstom 1"--produced by Polish People's Republic, "Gisadent NCA"--produced by GDR and "Wiron-88"--produced by German Federal Republic have been subjected to the comparative examinations. Metallographic examination have been carried out beside fluidity, macrohardness, hardness and Vickers microhardness. Basing on the examinations' results the initial estimation of the new elaborated polish alloy called "Microstom-1" has been performed and it has been recommended first for phantom works after casting and porcelain hot covering practices is polished up and then for clinical work in order to gain experiences also in this sphere.