Talk:Tooth

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Describe the Pattern of Teeth in Mouth[edit]

incisors, canines, pre-molars, molars, which are "cheek teeth" anatomy of tooth, gums, circulatory system and nervous system in mouth/teeth tooth/mouth conditions and problems — Preceding unsigned comment added by 152.3.68.15 (talk) 01:07, 27 September 2012 (UTC)

Where's birds?[edit]

Birds can have teeth too...--72.197.35.238 (talk) 19:04, 13 June 2011 (UTC)

Er no...they don't. Maybe you're thinking about the egg tooth? - M0rphzone (talk) 02:13, 2 April 2012 (UTC)

Teeth have emaeml the hardest subtance in the body — Preceding unsigned comment added by 76.119.39.142 (talk) 01:33, 9 February 2012 (UTC)

Grammar thing[edit]

Tooth (plural teeth) are small, calcified, whitish structures found in the jaws Clearly this should be changed to "A tooth is a small, calcified, whitish structure. . . " because, it's you know, singular.

More grammar[edit]

“Early fish such as the thelodonts had teeth for scales, suggesting that the origin of teeth was scales which were retained in the mouth.” - scales for teeth perhaps? Anihl (talk) 01:47, 27 February 2013 (UTC)

It's closer to accurate as is - early scales were heavily ossified, with dentine at the main support and a layer of almost-but-not-quite enamel. A subset of these were modified to become teeth. It's pretty poorly phrases as it is. I'll give it a quick edit, see if I cant improve it. HCA (talk) 16:28, 27 February 2013 (UTC)

Canines: In dogs, the teeth are less likely than humans to form dental cavities because of the very high pH of dog saliva, which prevents enamel from demineralizing[edit]

This seems inaccurate, despite it supposedly being sourced from a 1992 book. The pH level of sugar is neutral, but isn't it more accurate to state that dental cavities are a result of sugars instead of low, neutral or high pH level? 71.112.173.40 (talk) 14:15, 24 March 2014 (UTC)

Turns out it's right, at least according to the source I added. And the pH of sugar isn't the issue, it's the pH of the salivary fluid, which can either retard or enhance bacterial growth. HCA (talk) 16:58, 24 March 2014 (UTC)

Evolutionary history of teeth[edit]

Unfortunately this article is protected, but here is an interesting article on the evolutionary history of teeth:

http://news.sciencemag.org/evolution/2015/06/ancient-fish-sheds-light-how-teeth-evolved

Summary: as has long been suspected, teeth are, at least in the case of the 400-million-year-old fish Romundina stellina and in all likelihood generally, specialised scales.

Note that the linked article doesn't mention scales explicitly, but the teeth of Romundina stellina are scale-like in structure and Philip Donoghue has said elsewhere that ‘the earliest teeth were like our own - but also structured like body scales in primitive fishes. This supports the view that teeth evolved from scales, which arose much earlier in vertebrate evolution.’ — Preceding unsigned comment added by 82.139.82.82 (talk) 22:51, 24 June 2015 (UTC)

This doesn't look right. The idea that teeth are homologous with scales, and that teeth came from scales, has been around since the 19th century. We shouldn't present this as a "gee-whiz" new idea. On the other hand, there is also an ongoing debate about which came first, teeth or scales, known as inside-out vs. outside-in. Meanwhile there's been mounting evidence that teeth/scales evolved independently on several occasions, that it doesn't matter which came first because either one can so quickly and easily morph into the other. Keeping in mind that the flexible proteinaceous scales found in today's fish are something new. Paleozoic fish scales are made of either bone covered with skin or dentin covered with enamel. Zyxwv99 (talk) 21:43, 15 August 2015 (UTC)

Small?[edit]

Considering in many animals from octopuses to hippos to saber-toothed cats and countless other, individual teeth can be very large in relation to any other organ even, it's not really appropriate to describe teeth in general as small in my opinion. — Preceding unsigned comment added by 2A02:908:183:38C0:8591:B320:52B4:D00B (talk) 22:30, 28 November 2016 (UTC)

Edit Proposal for Rodent Section[edit]

Through the course of our rat specimen dissection, we could potentially elaborate on the vasculature and other gross anatomical elements of rodent teeth, as compared to human dental anatomy.Shawnbrookins (talk) 05:04, 8 March 2017 (UTC)

I've added the term hypselodont to the rodent section and added a new citation. I've also edited and added sentences in the rodent incisor section. I plan on adding my own images of the rodent upper and lower incisors in the future once I have properly labeled them. Dizzle32 (talk) 04:26, 19 April 2017 (UTC)

Added another sentence about the production of enamel and dentin, along with a citation. Dizzle32 (talk) 02:29, 3 May 2017 (UTC)

Added more images of the top incisors from the Rattus rattus specimen. Also rearranged the images of the rodent incisors to fit within the Rodent section only. Dizzle32 (talk) 05:29, 11 May 2017 (UTC)