Postmortem pink teeth phenomenon results from an inhibition of haemoglobin and haemoglobin breakdown products into the dentinal tubules. Post-mortem pink teeth must not be considered a reliable odontological parameter for determining the cause of death, however, the results of other studies have shown that the pink teeth phenomenon is a common finding related to cases of asphyxia such as strangulation, drowning or suffocation.
More on my Blogspot(an oldie but a goodie)
New Open Access Issue of Dental Anthropology Journal
Human Life History Evolution Explains Dissociation between the Timing of Tooth Eruption and Peak Rates of Root Growth
We explored the relationship between growth in tooth root length and the modern human extended period of childhood. Tooth roots provide support to counter chewing forces and so it is advantageous to grow roots quickly to allow teeth to erupt into function as early as possible. Growth in tooth root length occurs with a characteristic spurt or peak in rate sometime between tooth crown completion and root apex closure. Here we show that in Pan troglodytes the peak in root growth rate coincides with the period of time teeth are erupting into function. However, the timing of peak root velocity in modern humans occurs earlier than expected and coincides better with estimates for tooth eruption times in Homo erectus. With more time to grow longer roots prior to eruption and smaller teeth that now require less support at the time they come into function, the root growth spurt no longer confers any advantage in modern humans. We suggest that a prolonged life history schedule eventually neutralised this adaptation some time after the appearance of Homo erectus. The root spurt persists in modern humans as an intrinsic marker event that shows selection operated, not primarily on tooth tissue growth, but on the process of tooth eruption. This demonstrates the overarching influence of life history evolution on several aspects of dental development. These new insights into tooth root growth now provide an additional line of enquiry that may contribute to future studies of more recent life history and dietary adaptations within the genus Homo” (read more).
The man known only as 12011 lived in Poland between 5,450 and 7,500 years ago. He was a hunter-gatherer. He died roughly between the ages of 40 and 45. Beyond that, the details of his life are a mystery. We don’t know what his voice would have sounded like. We don’t know what he liked or disliked. We don’t know why he died.
We do, however, know which bacteria were living on his teeth.
Microbes grew inside his mouth just as they do on yours. They created a layer of plaque on his teeth, which eventually hardened into tartar—a substance that’s structurally similar to concrete. In tartar, bacteria become locked in a mineral cage of calcium phosphate, which is so tough and stable that they can last for thousands of years in pristine condition. That’s why the teeth of many human skulls still contain bacteria that lived inside their owner’s mouths—entombed for millennia, dead but not decayed.
Alan Cooper from the University of Adelaide used these preserved microbes to study how the bacteria within European mouths have changed over 10,000 years of history.
Mixed dentition is a stage that lasts 2-3 years. Permanent teeth are the second set of teeth formed — there are thirty-two permanent teeth. The first permanent tooth typically appears in the mouth at around age six, and the mouth will then be in a transition period with both deciduous teeth and permanent teeth, until the last deciduous tooth is lost. The first of the adult teeth to erupt are the permanent first molars that come through the gums at the back. Up to the age of 13, twenty-eight of the thirty-two permanent teeth will appear. The full permanent dentition is completed much later. The four last adult teeth, one at the back of every arch will appear between the ages of 17 and 25 years.
More on my Blogspot
Nothing makes you want to brush your teeth more than studying dental calculus and caries in palepathology class. Bleh
Yes but the phytoliths in that calculus…So very, very interesting for palaeodietary studies.
- Henry, A.G., Brooks, A.S. and Piperno, D.R. 2011. “Microfossils in calculus demonstrate consumption of plants and cooked foods in Neanderthal diets (Shanidar III, Iraq; Spy I and II, Belgium),” PNAS 108:486-491.
Showing a mesiodens(arrow) that has deviated the maxillary left central incisor to a horizontal position. A mesiodens is a supernumerary tooth located in the palatal midline between the two maxillary central incisors
Tooth decay, caused by extensive dental resorption. A healthy portion of the tooth surface can still be seen at the bottom of the image.
Scanning electron microscopic image.
Linear enamel hypoplasia in permanment adult dentition
Poor health and malnutrition can disrupt enamel formation and leave horizontal bands or grooves on the crowns of teeth which do not grow out and stay there permanently.
Those are some very interesting wear patterns.
Collection of milk teeth. When we are born we already have teeth beneath the gums. These deciduous teeth begin to appear when we are about six months old; and we have twenty by about age three. Between the ages of six and seven, the roots of these milk teeth dissolve and eventually the tooth falls out. Milk teeth also work as a guide for adult teeth to follow.
o u mean liek