When did Western toothbrushes begin?

Toothbrushes were invented in the Sung period in China (960 – 1279).
Horsehair was implanted in handles made of bulls’ horns and bulls or camels’ bones. The first of the kind was introduced into Europe via the Silk Road. Upper-class people in Europe used toothbrushes whose handles were made of ivory, animal bones, gold or silver with horsehair or hog bristles implanted. High-end toothbrushes included one whose handle was decorated with pearl oysters on the surface.
Toothbrushes in around the 18th century were filthy as hair bundles were densely implanted, which did not let air through. In 1935, American company Du Pont developed nylon and applied it to toothbrushes, which spread throughout the world.

Illustration:Western toothbrushes in the 19th century