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Resident zoo vet, Charlotte Bentley said the teeth that they operated on were "highly specialised and sharp molars".

Simply put, with this model, periodontal disease is artificially induced by ligating silk threads onto the molars of mice models, which induces plaque accumulation.

In a similar incident in 2006, a member of their research team was allegedly instructed to extract teeth and molars from a collection of skulls abroad and bring them back to the Netherlands.

Wisdom teeth, or a person's third and final set of back molars, are the last teeth to grow in one's mouth.

They concluded they had a new species, Kenyanthropus platyops, with a flatter face and smaller molars than Lucy’s species—traits suggesting it was intermediate between Lucy and Homo.