Tusk
Revision as of 06:18, 24 July 2013 by (username removed)
Description
A large protruding tooth found in elephants, walruses, narwhals, and boars. Tusks, like teeth, have a soft center surrounded by hard dentin primarily composed of calcium hydroxyapatite with smaller amounts of calcium carbonate, calcium fluoride, magnesium phosphate, and ossein. A hard durable enamel forms a smooth outer surface. See also elephant tusk, mammoth tusk, narwhal tusk, walrus tusk, and wild boar tusk.