Age estimation of archaeological remains using amino acid racemization in dental enamel : a comparison of morphological, biochemical, and known ages-at-death

Griffin, Rebecca C. and Chamberlain, Andrew T. and Hotz, Gerhard and Penkman, K. E. H. and Collins, Mathew C.. (2009) Age estimation of archaeological remains using amino acid racemization in dental enamel : a comparison of morphological, biochemical, and known ages-at-death. American journal of physical anthropology, Vol. 140No. 2. pp. 244-252.

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Official URL: http://edoc.unibas.ch/dok/A5253307

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The poor accuracy of most current methods for estimating age-at-death in adult human skeletal remains is among the key problems facing palaeodemography. In forensic science, this problem has been solved for unburnt remains by the development of a chemical method for age estimation, using amino acid racemization in collagen extracted from dentine. Previous application of racemization methods to archaeological material has proven problematic. This study presents the application to archaeological human remains of a new age estimation method utilizing amino acid racemization in a potentially closed system - the dental enamel. The amino acid composition and extent of racemization in enamel from two Medieval cemeteries (Newcastle Blackgate and Grantham, England) and from a documented age-at-death sample from a 19th century cemetery (Spitalfriedhof St Johann, Switzerland) were determined. Alterations in the amino acid composition were detected in all populations, indicating that diagenetic change had taken place. However, in the Medieval populations, these changes did not appear to have substantially affected the relationship between racemization and age-at-death, with a strong relationship being retained between aspartic acid racemization and the morphological age estimates. In contrast, there was a poor relationship between racemization and age in the post-medieval documented age-at-death population from Switzerland. This appears to be due to leaching of amino acids post-mortem, indicating that enamel is not functioning as a perfectly closed system. Isolation of amino acids from a fraction of enamel which is less susceptible to leaching may improve the success of amino acid racemization for archaeological age estimation. Am J Phys Anthropol, 2009. © 2009 Wiley-Liss, Inc.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Integrative Biologie > Integrative Prähistorische und Naturwissenschaftliche Archäologie (IPNA Schünemann)
UniBasel Contributors:Hotz, Gerhard
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Wistar Institute of Anatomy
Note:Publication type according to Uni Basel Research Database: Journal article
Last Modified:22 Mar 2012 14:29
Deposited On:22 Mar 2012 14:06

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