Asked in Metal and Alloys
What is the difference between high copper and low copper amalgam?
June 18, 2009 3:28PM
High copper amalgams are a new class of amalgams introduced by manufacturers starting about 1975-1976. The high copper amalgams are called such because they contain a new mixture of metals that include a significantly higher copper content than the previous generation of amalgam.
The 'high copper' amalgams reportedly have better strength, durability and clinical outcomes than previous low copper versions.
Some amalgam critics have alleged that high copper amalgams off gas mercury vapor at a much higher rate than the previous low copper versions, up to 50x faster.