Most dentists recommend a proper teeth cleaning every six months to prevent, among other things, the implacable buildup of calculus or tartar — hardened dental plaque. Routine calculus buildup can only be removed through the use of ultrasonic tools or dental hand instruments.
Tel Aviv University researchers, in collaboration with scholars from Spain, the UK and Australia, have uncovered evidence of food and potential respiratory irritants entrapped in the dental calculus of 400,000-year-old teeth at Qesem Cave near Tel Aviv (Israel).
The research led by Prof. Karen Hardy of ICREA at the Universitat Autònoma, Barcelona, Spain, provides direct evidence of what early Palaeolithic people ate and the quality of the air they breathed inside Qesem Cave.
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Marius Hoppe
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