Interproximal grooves have been identified on a variety of Pleistocene Homo taxa from different sites across the Old World. A diversity of hypotheses has been proposed to explain these interproximal grooves, ranging from oral hygiene to alleviating pain due to periodontal disease. The most popular explanation appears to be the habitual use of a toothpick, made of bone, horn or plant material. However,...
Tooth-picking behaviour identified in Middle Pleistocene Hominins of Eastern China
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