All posts tagged with teeth

Link: Fourth molars in an early hominin

less than 1 minute read

I was doing some searching through the abstracts for the upcoming AAPA meetings, and I found that the system gave me abstracts for past meetings as well, so ...

Notable: A tooth from West Turkana

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Notable paper: Maddux, Scott C. et al. 2015. A 750,000 year old hominin molar from the site of Nadung’a, West Turkana, Kenya. Journal of Human Evolution (in ...

Wisdom of Mann

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Steve Mirsky caught up with Alan Mann for a recent Scientific American 60-second podcast: “Third Molars Illustrate Differential Reproduction”. The result is ...

Tracing teeth troubles with fossil bacteria

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Ed Yong has a great account today of some research from Alan Cooper’s lab on the oral microbiome in pre-agricultural and post-agricultural Europeans: “Prehis...

Teeth and teaching

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Razib Khan has a short but worthwhile post about dental health and heritability: “The moral measure of bad teeth”.

Calculus microbially

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Molecular archaeologist Christina Warinner gave a TED talk and the main ideas are now in a CNN article: “Why your dental plaque is valuable”.

Tooth wear

1 minute read

Teeth have a close association with longevity. Enamel is the hardest substance in the body, but it does break, wear out, and is sometimes attacked by microbe...

Incisors

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The incisors are the front teeth. They are basically flat and have a blade-like occlusal surface. Each quadrant has two incisors.

Deciduous teeth

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Like most mammals, humans have two sets of teeth. The first set is called the deciduous dentition, but you probably know these as “baby teeth.”

Canines

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The canine teeth in humans range from pointy-shaped to incisor-like in shape. There is only one canine in each quadrant, and it is the third tooth just dista...

Wisdom teeth

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Most humans have three molars, but many — especially in America — have their third molars (called wisdom teeth) extracted. Some people do not develop third m...

Premolars

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The premolars are directly distal to (behind) the canines. Generally there are two premolars in each quadrant. Counting backward from the front of the jaw, t...

Premolars in primates

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Different kinds of primates have different numbers of premolars in their dentitions. The ancestral number of premolars in primates is three in each quadrant ...

Molars

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The most distal teeth are molars. Most humans have three molars, but many — especially in America — have their third molars (called wisdom teeth) extracted. ...

Teeth

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Goals:

Incisors

less than 1 minute read

The incisors are the front teeth. They are basically flat and have a blade-like occlusal surface. Each quadrant has two incisors.

Tartar control and Neandertal plant use

6 minute read

Dental plaque is a biofilm made up of bacteria adhering to the enamel surface of the teeth. Plaque is soft but over many days can gradually calcify. The hard...

Neanderart

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Alan Boyle reports on two new papers in PNAS. The first concerns the dental development of the Lagar Velho skeleton. The second verges on Neandertal art:

Qafzeh teeth like Neandertals

3 minute read

Debbie Guatelli-Steinberg and Donald Reid report on the perikymata spacing of a sample of fourteen anterior teeth from Qafzeh. These are “early modern humans...

Enamelin gene loss in toothless mammals

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Jerry Coyne describes a new paper on the accumulation of loss-of-function mutations to ENAM in lineages with tooth reductions: “Dead Genes for Tooth Enamel”.

Frankenteeth on the horizon

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Joel Garreau (Radical Evolution) covers the future genetics beat for the Washington Post. In today’s edition, he has an interesting article about tooth regen...

Dental growth in early Homo

3 minute read

Dean and colleagues (2001) present a study of perikymata counts of anterior teeth (incisors and canines) in early humans and australopithecines, compared to...