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Toothbrushes
The toothbrush is an instrument used to clean teeth, consisting of a small brush on a handle. Toothpaste, often containing fluoride, is commonly added to a toothbrush to aid in cleaning. Toothbrushes are offered with varying textures of bristles, and come in many different sizes and forms. more...
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Most dentists recommend using a toothbrush labelled "Soft", since firmer bristled toothbrushes can damage enamel and irritate gums. Toothbrushes are often made from synthetic materials, although natural toothbrushes are also known in many parts of the world.
History
A variety of oral hygiene measures have been used since before recorded history. This has been verified by various excavations done all over the world, in which toothpicks, chewsticks, tree twigs, linen strips, birds' feathers, animal bones and porcupine quills were recovered. The first toothbrush is believed to have been invented in China. In the Muslim world, the miswak or siwak made from a twig or root with antiseptic properties is widely used. Rubbing baking soda or chalk against the teeth was also common.
William Addis, England, is credited with creating the first mass-produced toothbrush in 1780. In 1770 he had been placed in jail for causing a riot. While in prison, he decided that the method for teeth brushing of the time - rubbing a rag on one's teeth - could be improved. So he took a small animal bone, drilled small holes in it, obtained some bristles from a guard, tied them in tufts, then passed the bristles through the holes on the bone and glued them.
The first patent for a toothbrush was by H. N. Wadsworth in 1850 in the United States, but mass production of the product in America only started in 1885. The rather advanced design had a bone handle with holes bored into it for the Siberian Boar hair bristles. (Boar wasn't an ideal material; it retained bacteria, it didn't dry well, and the bristles would often fall out of the brush).
It wasn't until World War II that the concept of brushing teeth really caught on in the U.S., in part due to the fact that it was part of American soldiers' regular daily duty to clean their teeth. It was a practice that they brought back to their home life after the conclusion of the war.
Natural bristles (from animal hair) were replaced by synthetic materials, usually nylon, by DuPont in 1938. The first nylon bristle toothbrush, made with nylon yarn, went on sale on February 24, 1938.
The first electric toothbrush, the Broxodent, was introduced by Squibb Pharmaceutical at the centennial of the American Dental Association in 1959.
In January 2003, the toothbrush was selected as the number one invention Americans could not live without, beating out the automobile, computer, cell phone, and microwave, according to the Lemelson-MIT Invention Index.
Electric Toothbrushes
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The first electric toothbrush was developed in 1939 in Switzerland, but did not appear on the open market until the 1960s, when it was marketed as the Broxodent in the United States by Squibb. In 1961, General Electric introduced a rechargeable cordless toothbrush that moved up and down when activated.
Read more at Wikipedia.org
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