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Clair Cameron Patterson (June 2, 1922 – December 5, 1995) [1] was an American geochemist.Born in Mitchellville, Iowa, Patterson graduated from Grinnell College.He later received his Ph.D. from the University of Chicago and spent his entire professional career at the California Institute of Technology (Caltech).
It is a very thin, black-blue line visible along the margin of the gums, at the base of the teeth. [1] [2] It is caused by the reaction between circulating lead and sulphur ions produced by oral bacteria, forming deposits of lead sulfide in the gums. [3] The sign was described in 1840 by Henry Burton: [4]
Thomas Midgley Jr. (May 18, 1889 – November 2, 1944) was an American mechanical and chemical engineer.He played a major role in developing leaded gasoline (tetraethyl lead) and some of the first chlorofluorocarbons (CFCs), better known in the United States by the brand name Freon; both products were later banned from common use due to their harmful impact on human health and the environment.
Lead interferes with metabolism of bones and teeth [188] and alters the permeability of blood vessels and collagen synthesis. [5] Lead may also be harmful to the developing immune system, causing production of excessive inflammatory proteins; this mechanism may mean that lead exposure is a risk factor for asthma in children. [188]
Pierre Fauchard (French pronunciation: [pjɛʁ foʃaʁ]; 2 January 1679 – 21 March 1761) [1] was a French physician, credited as being the "father of modern dentistry". [2] He is widely known for writing the first complete scientific description of dentistry, Le Chirurgien Dentiste ("The Surgeon Dentist"), published in 1728. [2]
Layne Thomas Staley (born Layne Rutherford Staley; August 22, 1967 – April 5, 2002) [2] [3] was an American singer and songwriter who was the original lead vocalist of Alice in Chains, which rose to international fame in the early 1990s as part of Seattle's grunge movement.
Teeth is a musical by Michael R. Jackson and Anna K. Jacobs, adapted from the 2007 horror film of the same name. It premiered off-Broadway in 2024 at Playwrights Horizons . The musical follows Dawn O'Keefe, an evangelical teenager, who is navigating the challenges of adolescent dating and chastity when she discovers she has teeth in her vagina .
Washington Wentworth Sheffield (April 23, 1827 – November 4, 1897) was an American dental surgeon best known for inventing modern toothpaste in the 1870s. With the help of his son Lucius T. Sheffield, he was also the first to sell the paste in collapsible tubes.