practice & effect:
For metal fillings and crowns Kavitätenspalt-Dichtungsmixtur uses the advantages of copper amalgam without whose disadvantages. The mixing liquid with activated metallic copper has to be applied directly on the cavity resp.
The crown stump before placing the filling. During a few weeks the activated copper transforms in basic copper compositions. Those are more voluminous, they act bactericide and they strongly tighten the filling.
Possibly generated edge fissures (marginal leakages) are permanently sealed bactericide. Kavitätenspalt-Dichtungsmixtur has been developed especially for metal fillings and crowns.
If a possibly formed dark margin does not disturb, it could be used for tooth coloured materials, too.