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Crown-formation time of a fossil hominid premolar tooth.

Beynon, AD; Dean, MC; (1987) Crown-formation time of a fossil hominid premolar tooth. Arch Oral Biol , 32 (11) pp. 773-780.

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Abstract

Studies using surface or internal enamel growth indicators in hominids have suggested that crown-formation times were shorter than those in modern man. The crown-formation time in a robust australopithecine premolar tooth was calculated by counting enamel cross-striations, which correspond to daily increments of formation, on a replica of the fractured internal enamel surface of cuspal enamel using scanning electron microscopy. Cervical enamel completion time was estimated using other growth indicators including striae, and using measured and calculated cross-striation repeat intervals, giving a completion time of approx. 2.4 yr. This is much shorter than reported premolar crown formation times in modern man. These findings support the concept of an abbreviated period of dental development, with implications on the duration of the growth period in early hominids.

Type: Article
Title: Crown-formation time of a fossil hominid premolar tooth.
Location: England
Keywords: Animals, Bicuspid, Dental Enamel, Fossils, Haplorhini, History, Ancient, Humans, Microscopy, Electron, Scanning, Odontogenesis, Paleodontology, Paleontology
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences > Cell and Developmental Biology
URI: http://discovery.ucl.ac.uk/id/eprint/56930
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