Amalgam (dentistry) packs the plastic mass, before it sets, into the cavity. The amalgam expands ≈0.1% over 6–8 hours on setting. The final structure is a metal matrix composite, where γ, η and γ phases, are a matrix for unreacted original alloy, minus the fast-reacting β-phase and excess Sn. Amalgam is a mixture of two or more metals (alloy) with mercury which has been purified first by distillation to remove impurities. Currently, major components of the alloy are silver tin and copper. The composition of the alloy powder is controlled by ISO standard for dental amalgam alloy (ISO 1559) to control the
I Always Get What I Want I Always Get What I Want "I Always Get What I Want" is a song by Canadian singer-songwriter Avril Lavigne, written by herself and Clif Magness for her second studio album, "Under My Skin" (2004). The track was released digitally on May 24, 2004 by Arista Records as a promotional tool for the album, which was released on the next day. The song was re-released on November 4, 2004 as the B-side of album's third single, "Nobody's Home". It was also featured in the film "", whose was released on August 3, 2004. "I Always Get What I Want" appeared