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Wiliam Addis in England, made a handle carved from cattle bone, swine bristles.
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first three row brush designed.
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nylon brushes were made.
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the first electric toothbrush
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first electric toothbrush in the U.S., the Broxodent.
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3500-3000 bc, the babylonians and egyptians made a frayed twig for brushing the teeth.