In 1909, dental hygiene was not yet a universal habit; reports suggest that as late as 1900, only about 7% of Americans brushed their teeth regularly. This archive captures the specific moment when hygiene "education" and industrial manufacturing began to change public health forever. Who invented the toothbrush and when was it invented?
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Original 1909 Prophylactic Tooth Brush ads, which were among the first to be sold in individual packaging to emphasize "sterilization". In 1909, dental hygiene was not yet a