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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
medicine
Brief communication: Contributions of enamel-dentine junction shape and enamel deposition to primate molar crown complexity
American Journal of Physical Anthropology, Volume 142, No. 1, Year 2010
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Description
Molar crown morphology varies among primates from relatively simple in some taxa to more complex in others, with such variability having both functional and taxonomic significance. In addition to the primary cusps, crown surface complexity derives from the presence of crests, cuspules, and crenulations. Developmentally, this complexity results from the deposition of an enamel cap over a basement membrane (the morphology of which is preserved as the enamel-dentine junction, or EDJ, in fully formed teeth). However, the relative contribution of the enamel cap and the EDJ to molar crown complexity is poorly characterized. In this study we examine the complexity of the EDJ and enamel surface of a broad sample of primate (including fossil hominin) lower molars through the application of microcomputed tomography and dental topographic analysis. Surface complexity of the EDJ and outer enamel surface (OES) is quantified by first mapping, and then summing, the total number of discrete surface orientation patches. We investigate the relative contribution of the EDJ and enamel cap to crown complexity by assessing the correlation in patch counts between the EDJ and OES within taxa and within individual teeth. We identify three patterns of EDJ/OES complexity which demonstrate that both crown patterning early in development and the subsequent deposition of the enamel cap contribute to overall crown complexity in primates. Am J Phys Anthropol 142:157-163, 2010. © 2010 Wiley-Liss, Inc.
Authors & Co-Authors
Skinner, Matthew M.
Germany, Leipzig
Max-planck-institut Für Evolutionäre Anthropologie
Evans, Alistair R.
Australia, Clayton
Monash University
Smith, Tanya M.
Germany, Leipzig
Max-planck-institut Für Evolutionäre Anthropologie
United States, Cambridge
Harvard University
Jernvall, Jukka
Finland, Helsinki
Institute of Biotechnology
United States, Stony Brook
Stony Brook University
Tafforeau, Paul
France, Grenoble
European Synchrotron Radiation Facility
Kupczik, Kornelius
Germany, Leipzig
Max-planck-institut Für Evolutionäre Anthropologie
Olejniczak, Anthony J.
Germany, Leipzig
Max-planck-institut Für Evolutionäre Anthropologie
Spain, Burgos
Centro Nacional de Investigación Sobre la Evolución Humana Cenieh
Rosas, Antonio
Spain, Madrid
Csic - Museo Nacional de Ciencias Naturales Mncn
Radovĉić, Jakov
Croatia, Zagreb
Hrvatski Prirodoslovni Muzej
Thackeray, John Francis
South Africa, Johannesburg
University of the Witwatersrand
Toussaint, Michel
Belgium, Namur
Service Public de Wallonie
Hublin, Jean Jacques
Germany, Leipzig
Max-planck-institut Für Evolutionäre Anthropologie
Statistics
Citations: 68
Authors: 12
Affiliations: 11
Identifiers
Doi:
10.1002/ajpa.21248
ISSN:
00029483
e-ISSN:
10968644
Research Areas
Health System And Policy