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Replacement teeth

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Replacement teeth

Replacement teeth (in gold) are sitting on a stack of resorption surfaces that like the plates in a cupboard, which evidences this tooth site has been replaced four times. In contrast, the other dentine units, the tooth-like odontodes (in red) and the gap-filling odontodes (in pink) that bury them, never experience basal resorption and won’t be shed.
Donglei Chen
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Creative Commons Attribution, no derivatives
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By:
Donglei Chen
File format:
.jpg
Size:
3780 x 2618, 3.59 MB
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  • Ancient fish illuminates one of the mysteries of childhood

    Remember dropping your milk teeth? In your hand was only the enamel-covered crown: the entire root of the tooth had somehow disappeared. In a paper published in Nature, a team of researchers from Uppsala University and the ESRF apply synchrotron x-ray tomography to a tiny jawbone of a 424 million year old fossil fish in order to illuminate the origin of this strange system of tooth replacement.