The inquiry pertains to the date of origin for a tool used in interdental cleaning, commonly a thin filament employed to remove food particles and dental plaque from areas between teeth that a toothbrush cannot easily reach. This practice aids in maintaining oral hygiene.
The historical record indicates that Levi Spear Parmly, a dentist, is credited with popularizing the concept in the early 19th century, specifically around 1815. He advocated for using a waxed silken thread to clean between teeth. This recommendation marked a significant step in preventative dental care.