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
What They Always Tell Us What They Always Tell Us What They Always Tell Us is the first novel by Martin Wilson, focusing on the relationship between two high school age brothers as one begins to embrace his homosexuality. The book was a finalist in the Children's/Young Adult category at the 2009 Lambda Literary Awards, but lost to "Out of the Pocket" by Bill Konigsberg. "What They Always Tell Us" was also chosen for the ALA's 2009 Rainbow List. "What They Always Tell Us" is told from the perspective of two brothers, Alex and James. Alex is a high school junior who struggles with depression;