[Effect of surface treatment and thermal stress on the adaptation of Germadent amalgam fillings]

Surfaces of amalgam-fillings (Germadent) applied to extracted human teeth were treated in four variants. The adaptation of the fillings to the cavosurface margins was measured with SEM before and after thermal stress. Burnishing lead to a clear reduction of leakages, in contrast to carving. Fillings polished after carving, and especially after burnishing, have smallest marginal leakage. Thermal charges cause a small deterioration of marginal adaptation.