DMANISI HOMININ USED TOOTHPICKS

1.77 million year old hominin from Dmanisi used toothpicks to clean the interdental space from the alimentational leftovers. The excessive use of the toothpick caused not only the damage of the dental hard tissues, creating the cylinder-shape gutter, but led to the local infection of the periodontal ligament.

The study was published in PNAS, oct. 2013.