Historical evolution of the toothbrush
Oral hygiene dates back to ancient times. Primitive people used their nails or wood chips to clean their teeth. In pre-Hispanic times indigenous people used plant roots or rubbed their teeth with their fingers. The toothbrush as we know it today appeared in the 17th century. Toothbrushes are designe...
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Materiálatiipa: | Girji |
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Editorial Ciencias Médicas,
2015-01-01T00:00:00Z.
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