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Growth layers and incremental markings in hard tissues; a review of the literature and some preliminary observations about enamel structure in Paranthropus boisei

Dean, MC; (1987) Growth layers and incremental markings in hard tissues; a review of the literature and some preliminary observations about enamel structure in Paranthropus boisei. Journal of Human Evolution , 16 (2) pp. 157-172. 10.1016/0047-2484(87)90074-1.

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Abstract

The general factors underlying the formation of growth layers and incremental markings in hard tissues are reviewed with particular reference to fossil hominid tooth enamel. The experimental and circumstantial evidence that point to a slowing of enamel matrix secretion in a daily (circadian) and near weekly (circaseptan) mode during tooth formation is also reviewed. Data from previous studies in which the number of daily increments between adjacent striae of Retzius have been recorded in primates are reviewed and new data are presented for this repeat interval in fossil hominids. The factors likely to influence the number of striae of Retzius beneath the cuspal regions of anterior teeth are outlined and the limitations of employing surface incremental features to obtain estimates for age at death of an individual are also discussed. It is concluded that there is good evidence to support the hypothesis that perikymata are near weekly incremental phenomena with a likely periodicity of 7,8 or 9 days in fossil hominids. It can also be concluded that at present, better estimates for the age at death of an individual during early phases of the growth period can be obtained from studies of perikymata than by any other non-destructive technique. © 1987.

Type: Article
Title: Growth layers and incremental markings in hard tissues; a review of the literature and some preliminary observations about enamel structure in Paranthropus boisei
DOI: 10.1016/0047-2484(87)90074-1
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/56914
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