#dentition

[2t2r]

La morue-lingue du Pacifique, le poisson aux 500 dents qui les remplace sans arrêt

Nouvel article publié sur https://2tout2rien.fr/lextraordinaire-dentition-de-la-morue-lingue-du-pacifique/

La morue-lingue du Pacifique, le poisson aux 500 dents qui les remplace sans arrêt

[bpod-bpod]

Tooth Wisdom

Enamel is the hardest structure in our bodies, and with good reason – it must protect our teeth from decades of daily gnashing. Here a high-powered microscope pictures enamel crystals (coloured artificially based on their direction) in neat rows on the surface of human teeth from 40,000 years ago. But enamel didn’t stay so neat. Researchers believe human enamel adapted and evolved to meet a changing diet – the crystal pattern became more 'misorientated', which can improve strength, around the time farming changed our diet to chewy seeds and grains (top right, 1,550 years ago). Changes in eating habits since then, including the industrial revolution, don’t appear to have evolved our enamel any further, bottom left (750 years ago) compared to bottom right (50 years ago). Creating bioinspired materials based on tooth enamel might take this evolution further, however, adding more irregularity to crystal patterns to boost strength and resilience.

Written by John Ankers

Image from work by Pupa U. P. A. Gilbert and colleagues

Department of Physics, University of Wisconsin, Madison, WI, USA; School of Anthropology and Conservation, University of Kent, Canterbury, UK

Image originally published with a Creative Commons Attribution – NonCommercial – NoDerivs (CC BY-NC-ND 4.0)

Published in Nature, June 2026

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[templeofminerva]

Need to get bitten really hard so I can have a temporary tattoo of someone's dentition

[saladgl0ve]

call me the labial surface of the incisors and canines the way I be facing her lips

[scienceguy22]

Elephant ❤️ A Bond That Lasts a Lifetime!

Did you know that an elephant only has 4 chewing teeth at a time? If the elephant has tusks, they have 6 teeth at one time, but even though tusks are teeth, they are not used for chewing. The 4 chewing teeth are all molars, 2 upper & 2 lower. Over a lifetime they grow 26 teeth, but they fall out naturally. A new molar grows at the back & slowly moves forward, pushing the old molar ahead. This happens 6 times over an elephant’s life. The old one eventually falls out, so they never have more than 4 chewing teeth at a time in their lifetime.

[biology-geology-beaches-india]

The Scientific Research Notes Of S. Sunkavally (years: 2002-2011).

962.

[pacificremains]

Wolverine with an extra tooth! Could be a retained deciduous incisor, but it's as big as the others.

I love this skull; wolverines are one of my favorites. This one came from Alaska where they are numerous enough that they aren't considered threatened.

[imagella-blog]

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