High-Cu amalgams have better corrosion resistance. As a side effect it also gives somewhat better mechanical properties-- Corrosion and pitting causes mechanical weakness. High-Cu amalgams typically last 2-3 times longer than a conventional low-Cu amalgam.
Still have to condense it properly though so you can remove as much of the Gamma-2 mercury phase as possible, which if not removed causes mechanical weakness.
Still have to condense it properly though so you can remove as much of the Gamma-2 mercury phase as possible, which if not removed causes mechanical weakness.
I thought that high copper (above 12%?) amalgams do not have the gamma-2 phase but instead have the eta phase (Cu-Sn).
Everything that I've read says that the high copper amalgams have greater strength, with less tarnish and corrosion and less creep. Am I just missing some reason why the low Cu may be used, or is it just an antiquated material?
