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New methodology to reconstruct in 2-D the cuspal enamel of modern human lower molars

Modesto-Mata, M; García-Campos, C; Martín-Francés, L; Martínez de Pinillos, M; García-González, R; Quintino, Y; Canals, A; ... Bermúdez de Castro, JM; + view all (2017) New methodology to reconstruct in 2-D the cuspal enamel of modern human lower molars. American Journal of Physical Anthropology , 163 (4) pp. 824-834. 10.1002/ajpa.23243. Green open access

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Abstract

OBJECTIVES: In the last years different methodologies have been developed to reconstruct worn teeth. In this article, we propose a new 2-D methodology to reconstruct the worn enamel of lower molars. Our main goals are to reconstruct molars with a high level of accuracy when measuring relevant histological variables and to validate the methodology calculating the errors associated with the measurements. METHODS: This methodology is based on polynomial regression equations, and has been validated using two different dental variables: cuspal enamel thickness and crown height of the protoconid. In order to perform the validation process, simulated worn modern human molars were employed. The associated errors of the measurements were also estimated applying methodologies previously proposed by other authors. RESULTS: The mean percentage error estimated in reconstructed molars for these two variables in comparison with their own real values is -2.17% for the cuspal enamel thickness of the protoconid and -3.18% for the crown height of the protoconid. This error significantly improves the results of other methodologies, both in the interobserver error and in the accuracy of the measurements. CONCLUSIONS: The new methodology based on polynomial regressions can be confidently applied to the reconstruction of cuspal enamel of lower molars, as it improves the accuracy of the measurements and reduces the interobserver error. The present study shows that it is important to validate all methodologies in order to know the associated errors. This new methodology can be easily exportable to other modern human populations, the human fossil record and forensic sciences.

Type: Article
Title: New methodology to reconstruct in 2-D the cuspal enamel of modern human lower molars
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1002/ajpa.23243
Publisher version: http://doi.org/10.1002/ajpa.23243
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: crown height, cuspal enamel thickness, molar reconstruction, polynomial regression
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 > UCL SLASH
UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of SandHS > Dept of Anthropology
URI: https://discovery.ucl.ac.uk/id/eprint/1556950
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