Thursday, January 27, 2011

DENTURES / FALSE TEETH.. who inveted it ???

Since antiquity, the most common material for false teeth was animal bone or ivory, especially from elephants or hippopotami. Human teeth were also used, pulled from the dead or sold by poor people from their own mouths. These kinds of false teeth soon rotted, turning brown and rancid. Rich people preferred teeth of silver, gold, mother of pearl, or agate.
Etruscans (people from the ancient country of Etruria in western Italy) made skillfully designed false teeth out of ivory and bone. These false teeth were secured in the mouth by gold bridgework as early as 700 B.C. Unfortunately, the skills and artistry that went into these efforts were lost until the 1800s.

In medieval times, the practice of dentistry was largely confined to tooth extraction. Replacement and repair were seldom considered. Gaps between teeth were expected, even among the rich and powerful. Queen Elizabeth I of England (1533-1603) filled the holes in her mouth with cloth to improve her appearance in public.

When hand-carved false teeth were installed, they were tied in place with silk threads. If not enough natural teeth remained to tie the dentures to, anchoring false ones was difficult.

In 1774 the French pharmacist Duchateau enlisted the help of the prominent dentist Dubois de Chemant to design hard-baked, rot-proof porcelain (a hard, white ceramic) dentures. De Chemant patented his improved version of these "Mineral Paste Teeth" in 1789 and took them with him when he emigrated to England shortly afterward. The single porcelain tooth held in place by an imbedded platinum pin was invented in 1808 by the Italian dentist Giuseppangelo Fonzi. Inspired by his dis-like of handling dead people's teeth, Claudius Ash of London, England, invented an improved porcelain tooth around 1837.

The real breakthrough in dentures came with the American inventor Charles Goodyear's (1800- 1860) discovery of vulcanized rubber in 1839. This cheap, easy-to-work material could be molded to fit the mouth and made a good base to hold false teeth.

Porcelain is no longer used because better materials have been developed. Today, dentures are made from either plastic or ceramic. These materials can be tinted to match existing teeth and look more like real teeth than ever before!!!!!



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