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Black-veined white on the red clover. Aporia crataegi, the black-veined white, is a large butterfly of the family Pieridae. A. crataegi is widespread and common. Its range extends from northwest Africa in the west to Transcaucasia and across the Palearctic to Siberia and Japan in the east. In the south, it is found in Turkey, Cyprus, Israel ...
Most pierid butterflies are white, yellow, or orange in coloration, often with black spots. The pigments that give the distinct coloring to these butterflies are derived from waste products in the body and are a characteristic of this family. [2] The family was created by William Swainson in 1820.
A man brushing his teeth while looking in a mirror. Tooth brushing is the act of scrubbing teeth with a toothbrush equipped with toothpaste.Interdental cleaning (with floss or an interdental brush) can be useful with tooth brushing, and together these two activities are the primary means of cleaning teeth, one of the main aspects of oral hygiene. [1]
Brushing teeth too hard can wear down the enamel, aka the protective layer on your teeth. (Photo illustration: Jay Sprogell for Yahoo News; photo: Getty Images) (Photo illustration: Jay Sprogell ...
The toothbrush originally became popular in the late 19th century, in the United States. [1] It was a neat, uniform, low-maintenance moustache that echoed the standardization and uniformity brought on by industrialization, in contrast to the more flamboyant styles typical of the 19th century such as the imperial, walrus, handlebar, horseshoe, and pencil moustaches.
A 1930s poster from the Work Projects Administration promoting oral hygiene. Tooth decay is the most common global disease. [14] Over 80% of cavities occur inside fissures in teeth where brushing cannot reach food left trapped after eating and saliva and fluoride have no access to neutralize acid and remineralize demineralized teeth, unlike easy-to-clean parts of the tooth, where fewer ...
They are also called brush-footed butterflies or four-footed butterflies, because they are known to stand on only four legs while the other two are curled up; in some species, these forelegs have a brush-like set of hairs, which gives this family its other common name.
Tooth brushing can remove plaque up to one millimeter below the gum line. Each person has a habitual brushing method, so more frequent brushing does not cover additional parts of the teeth or mouth. [47] Most dentists recommended patients brush twice a day in the hope that frequent brushing would clean more areas of the mouth. [48]