Amalgam (dentistry) Amalgam (dentistry) Dental amalgam is a liquid mercury and metal alloy mixture used in dentistry to fill cavities caused by tooth decay. Low-copper amalgam commonly consists of mercury (50%), silver (~22–32%), tin (~14%), copper (~8%) and other trace metals. Dental amalgams were first documented in a Tang Dynasty medical text written by Su Gong 苏恭 in 659, and appeared in Germany in 1528. In the 1800s, amalgam became the dental restorative material of choice due to its low cost, ease of application, strength, and durability. There are, according to Geir Bjørklund, indications that dental amalgam was used in the first
You Can't Always Get What You Want You Can't Always Get What You Want "You Can't Always Get What You Want" is a song by the Rolling Stones on their 1969 album "Let It Bleed". Written by Mick Jagger and Keith Richards, it was named as the 100th greatest song of all time by "Rolling Stone" magazine in its 2004 list of the "500 Greatest Songs of All Time". Jagger commented on the song's beginnings: "You Can't Always Get What You Want" was the first song recorded for the album. It exists in two versions, a 5:00 single mix and a 7:28 album mix. "You Can't Always