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Dinosaur teeth have been studied since 1822 when Mary Ann Mantell (1795-1869) ... essential to revealing the most important aspects of dinosaur dental anatomy.
Within the alveoli, teeth are periodically replaced by new teeth growing beneath; shedding of the old tooth crown occurs after resorption of the root. The condition of having deep alveoli is known as thecodont , and is present throughout Archosauria , including dinosaurs.
Very young specimens show simple cup shapes occlusion zones, or areas where the teeth contact one another in chewing, whereas in adulthood there is a "dual function" arrangement with two distinct areas of different tooth wear. This change during growth may have helped transition from a diet of softer plants when young to more tough and fibrous ...
Reisz developed this hypothesis by studying dental anatomy and living relatives of dinosaurs. Lips protect teeth from drying out and they help preserve the enamel.
The earliest dinosaurs were almost certainly predators, and shared several predatory features with their nearest non-dinosaur relatives like Lagosuchus, including: relatively large, curved, blade-like teeth in large, wide-opening jaws that closed like scissors; relatively small abdomens, as carnivores do not require large digestive systems ...
The largest found so far is estimated to have been 30.5 cm (12.0 in) long including the root when the animal was alive, making it the largest tooth of any carnivorous dinosaur yet found. [54] The lower jaw was robust. Its front dentary bone bore thirteen teeth. Behind the tooth row, the lower jaw became notably taller. [51]
Dimetrodon (/ d aɪ ˈ m iː t r ə ˌ d ɒ n / ⓘ [1] or / d aɪ ˈ m ɛ t r ə ˌ d ɒ n /; [2] lit. ' two measures of teeth ') is an extinct genus of sphenacodontid synapsid tetrapods that lived during the Cisuralian age of the Early Permian period, around 295–272 million years ago.
Estimations of the tooth count of Carcharodontosaurus vary, but a recent estimate of 30 dentary, 8 premaxillary, and 24 maxillary teeth for a total of 62 teeth was made. [56] Carcharodontosaurid teeth are some of the largest of any dinosaur group, with a maxillary tooth from SNSB-BSPG 1922 X 46 being 6.8 centimetres (2.7 in) tall and 3.5 ...