Brief communication: Contributions of enamel‐dentine junction shape and enamel deposition to primate molar crown complexity
Identifieur interne : 007329 ( Main/Exploration ); précédent : 007328; suivant : 007330Brief communication: Contributions of enamel‐dentine junction shape and enamel deposition to primate molar crown complexity
Auteurs : Matthew M. Skinner [Allemagne] ; Alistair Evans [Australie] ; Tanya Smith [Allemagne, États-Unis] ; Jukka Jernvall [Finlande, États-Unis] ; Paul Tafforeau [France] ; Kornelius Kupczik [Allemagne] ; Anthony J. Olejniczak [Allemagne, Espagne] ; Antonio Rosas [Espagne] ; Jakov Radov I [Croatie] ; J. Francis Thackeray [Afrique du Sud] ; Michel Toussaint [Belgique] ; Jean-Jacques Hublin [Allemagne]Source :
- American Journal of Physical Anthropology [ 0002-9483 ] ; 2010-05.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Homme.
English descriptors
- KwdEn :
- Accessory cusps, Additional features, American journal, Australopithecus africanus, Basement membrane, Central africa, Chiropotes, Chiropotes exhibits, Chiropotes molars, Crenulated enamel, Crenulations, Crown complexity, Crown patterning, Cusp, Dental crown, Dentin, Dentinoenamel junction, Deposition, Developmental origin, Digital elevation model, Enamel, Enamel deposition, Enamel surface, European synchrotron radiation facility, Evolutionary anthropology, Fossil, Fossil hominins, Further study, Homo, Homo neanderthalensis, Human, Human evolution, Individual teeth, Inner enamel epithelium, Interspecific comparison, Jernvall, Kernel size, Kraus, Lower molars, Modern humans, Molar, Molar crown complexity, Molar pattern, Morphological features, Morphology, Museum collections, National museum, Natural history, Occlusal, Occlusal basin, Occlusal surface, Outer enamel surface, Overall complexity, Overall crown complexity, Paranthropus robustus, Patch, Patch count, Patch counts, Patch patch count, Patterning, Physical anthropology, Planck institute, Pongo, Pongo molars, Predominant role, Previous studies, Primary cusps, Primate, Primate taxa, Primates, Relative contribution, Royal museum, Sample size, Second pattern, Skinner, Small sample, Study taxa, Subsequent deposition, Surface complexity, Surface models, Surfer manipulator software, Synchrotron tomography, Taxon, Tomography, Tooth crown morphology, Tooth enamel, Topography, Unique pattern, Whisker plots.
- Teeft :
- Accessory cusps, Additional features, American journal, Australopithecus africanus, Basement membrane, Central africa, Chiropotes, Chiropotes exhibits, Chiropotes molars, Crenulated enamel, Crenulations, Crown complexity, Crown patterning, Cusp, Dentinoenamel junction, Deposition, Developmental origin, Digital elevation model, Enamel, Enamel deposition, Enamel surface, European synchrotron radiation facility, Evolutionary anthropology, Fossil hominins, Further study, Homo, Homo neanderthalensis, Human evolution, Individual teeth, Inner enamel epithelium, Jernvall, Kernel size, Kraus, Lower molars, Modern humans, Molar, Molar crown complexity, Molar pattern, Morphological features, Morphology, Museum collections, National museum, Natural history, Occlusal, Occlusal basin, Occlusal surface, Outer enamel surface, Overall complexity, Overall crown complexity, Paranthropus robustus, Patch, Patch count, Patch counts, Patch patch count, Patterning, Physical anthropology, Planck institute, Pongo, Pongo molars, Predominant role, Previous studies, Primary cusps, Primate, Primate taxa, Primates, Relative contribution, Royal museum, Sample size, Second pattern, Skinner, Small sample, Study taxa, Subsequent deposition, Surface complexity, Surface models, Surfer manipulator software, Synchrotron tomography, Taxon, Tooth crown morphology, Unique pattern, Whisker plots.
Abstract
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 micro‐computed 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, 2010. © 2010 Wiley‐Liss, Inc.
Url:
DOI: 10.1002/ajpa.21248
Affiliations:
- Afrique du Sud, Allemagne, Australie, Belgique, Croatie, Espagne, Finlande, France, États-Unis
- Auvergne-Rhône-Alpes, District de Leipzig, Gauteng, Massachusetts, Rhône-Alpes, Saxe (Land), Uusimaa, État de New York
- Grenoble, Helsinki, Johannesbourg, Leipzig
- Université d'Helsinki, Université du Witwatersrand
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Le document en format XML
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Olejniczak</name><affiliation wicri:level="3"><country xml:lang="fr">Allemagne</country><wicri:regionArea>Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Leipzig, 04103</wicri:regionArea><placeName><region type="land" nuts="1">Saxe (Land)</region><region type="district" nuts="2">District de Leipzig</region><settlement type="city">Leipzig</settlement></placeName></affiliation><affiliation wicri:level="1"><country xml:lang="fr">Espagne</country><wicri:regionArea>Centro Nacional de Investigación sobre la Evolución Humana (CENIEH), Paseo Sierra de Atapuerca, s/n, Burgos, 09002</wicri:regionArea><wicri:noRegion>09002</wicri:noRegion></affiliation></author><author><name sortKey="Rosas, Antonio" sort="Rosas, Antonio" uniqKey="Rosas A" first="Antonio" last="Rosas">Antonio Rosas</name><affiliation wicri:level="1"><country xml:lang="fr">Espagne</country><wicri:regionArea>Paleoanthropology Group, Department of Paleobiology, Museo Nacional de Ciencias Naturales (CSIC), Madrid, 28006</wicri:regionArea><wicri:noRegion>28006</wicri:noRegion></affiliation></author><author><name sortKey="Radov I, Jakov" sort="Radov I, Jakov" uniqKey="Radov I J" first="Jakov" last="Radov I">Jakov Radov I</name><affiliation wicri:level="1"><country xml:lang="fr">Croatie</country><wicri:regionArea>Head Curator of Geology Paleontology Department of the Croatian Natural History Museum, Zagreb, 10000</wicri:regionArea><wicri:noRegion>10000</wicri:noRegion></affiliation></author><author><name sortKey="Thackeray, J Francis" sort="Thackeray, J Francis" uniqKey="Thackeray J" first="J. Francis" last="Thackeray">J. Francis Thackeray</name><affiliation wicri:level="4"><country xml:lang="fr">Afrique du Sud</country><wicri:regionArea>Institute for Human Evolution, University of the Witwatersrand, Johannesburg, 2050</wicri:regionArea><orgName type="university">Université du Witwatersrand</orgName><placeName><settlement type="city">Johannesbourg</settlement><region type="region" nuts="2">Gauteng</region></placeName></affiliation></author><author><name sortKey="Toussaint, Michel" sort="Toussaint, Michel" uniqKey="Toussaint M" first="Michel" last="Toussaint">Michel Toussaint</name><affiliation wicri:level="1"><country xml:lang="fr">Belgique</country><wicri:regionArea>Direction de l'Archéologie Service Public de Wallonie, Namur, 5100</wicri:regionArea><wicri:noRegion>5100</wicri:noRegion></affiliation></author><author><name sortKey="Hublin, Jean Acques" sort="Hublin, Jean Acques" uniqKey="Hublin J" first="Jean-Jacques" last="Hublin">Jean-Jacques Hublin</name><affiliation wicri:level="3"><country xml:lang="fr">Allemagne</country><wicri:regionArea>Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Leipzig, 04103</wicri:regionArea><placeName><region type="land" nuts="1">Saxe (Land)</region><region type="district" nuts="2">District de Leipzig</region><settlement type="city">Leipzig</settlement></placeName></affiliation></author></analytic><monogr></monogr><series><title level="j" type="main">American Journal of Physical Anthropology</title><title level="j" type="alt">AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY</title><idno type="ISSN">0002-9483</idno><idno type="eISSN">1096-8644</idno><imprint><biblScope unit="vol">142</biblScope><biblScope unit="issue">1</biblScope><biblScope unit="page" from="157">157</biblScope><biblScope unit="page" to="163">163</biblScope><biblScope unit="page-count">7</biblScope><publisher>Wiley Subscription Services, Inc., A Wiley Company</publisher><pubPlace>Hoboken</pubPlace><date type="published" when="2010-05">2010-05</date></imprint><idno type="ISSN">0002-9483</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0002-9483</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Accessory cusps</term><term>Additional features</term><term>American journal</term><term>Australopithecus africanus</term><term>Basement membrane</term><term>Central africa</term><term>Chiropotes</term><term>Chiropotes exhibits</term><term>Chiropotes molars</term><term>Crenulated enamel</term><term>Crenulations</term><term>Crown complexity</term><term>Crown patterning</term><term>Cusp</term><term>Dental crown</term><term>Dentin</term><term>Dentinoenamel junction</term><term>Deposition</term><term>Developmental origin</term><term>Digital elevation model</term><term>Enamel</term><term>Enamel deposition</term><term>Enamel surface</term><term>European synchrotron radiation facility</term><term>Evolutionary anthropology</term><term>Fossil</term><term>Fossil hominins</term><term>Further study</term><term>Homo</term><term>Homo neanderthalensis</term><term>Human</term><term>Human evolution</term><term>Individual teeth</term><term>Inner enamel epithelium</term><term>Interspecific comparison</term><term>Jernvall</term><term>Kernel size</term><term>Kraus</term><term>Lower molars</term><term>Modern humans</term><term>Molar</term><term>Molar crown complexity</term><term>Molar pattern</term><term>Morphological features</term><term>Morphology</term><term>Museum collections</term><term>National museum</term><term>Natural history</term><term>Occlusal</term><term>Occlusal basin</term><term>Occlusal surface</term><term>Outer enamel surface</term><term>Overall complexity</term><term>Overall crown complexity</term><term>Paranthropus robustus</term><term>Patch</term><term>Patch count</term><term>Patch counts</term><term>Patch patch count</term><term>Patterning</term><term>Physical anthropology</term><term>Planck institute</term><term>Pongo</term><term>Pongo molars</term><term>Predominant role</term><term>Previous studies</term><term>Primary cusps</term><term>Primate</term><term>Primate taxa</term><term>Primates</term><term>Relative contribution</term><term>Royal museum</term><term>Sample size</term><term>Second pattern</term><term>Skinner</term><term>Small sample</term><term>Study taxa</term><term>Subsequent deposition</term><term>Surface complexity</term><term>Surface models</term><term>Surfer manipulator software</term><term>Synchrotron tomography</term><term>Taxon</term><term>Tomography</term><term>Tooth crown morphology</term><term>Tooth enamel</term><term>Topography</term><term>Unique pattern</term><term>Whisker plots</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Comparaison interspécifique</term><term>Couronne dentaire</term><term>Dentine</term><term>Email dentaire</term><term>Fossile</term><term>Homme</term><term>Morphologie</term><term>Primates</term><term>Tomographie</term><term>Topographie</term></keywords><keywords scheme="Teeft" xml:lang="en"><term>Accessory cusps</term><term>Additional features</term><term>American journal</term><term>Australopithecus africanus</term><term>Basement membrane</term><term>Central africa</term><term>Chiropotes</term><term>Chiropotes exhibits</term><term>Chiropotes molars</term><term>Crenulated enamel</term><term>Crenulations</term><term>Crown complexity</term><term>Crown patterning</term><term>Cusp</term><term>Dentinoenamel junction</term><term>Deposition</term><term>Developmental origin</term><term>Digital elevation model</term><term>Enamel</term><term>Enamel deposition</term><term>Enamel surface</term><term>European synchrotron radiation facility</term><term>Evolutionary anthropology</term><term>Fossil hominins</term><term>Further study</term><term>Homo</term><term>Homo neanderthalensis</term><term>Human evolution</term><term>Individual teeth</term><term>Inner enamel epithelium</term><term>Jernvall</term><term>Kernel size</term><term>Kraus</term><term>Lower molars</term><term>Modern humans</term><term>Molar</term><term>Molar crown complexity</term><term>Molar pattern</term><term>Morphological features</term><term>Morphology</term><term>Museum collections</term><term>National museum</term><term>Natural history</term><term>Occlusal</term><term>Occlusal basin</term><term>Occlusal surface</term><term>Outer enamel surface</term><term>Overall complexity</term><term>Overall crown complexity</term><term>Paranthropus robustus</term><term>Patch</term><term>Patch count</term><term>Patch counts</term><term>Patch patch count</term><term>Patterning</term><term>Physical anthropology</term><term>Planck institute</term><term>Pongo</term><term>Pongo molars</term><term>Predominant role</term><term>Previous studies</term><term>Primary cusps</term><term>Primate</term><term>Primate taxa</term><term>Primates</term><term>Relative contribution</term><term>Royal museum</term><term>Sample size</term><term>Second pattern</term><term>Skinner</term><term>Small sample</term><term>Study taxa</term><term>Subsequent deposition</term><term>Surface complexity</term><term>Surface models</term><term>Surfer manipulator software</term><term>Synchrotron tomography</term><term>Taxon</term><term>Tooth crown morphology</term><term>Unique pattern</term><term>Whisker plots</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Homme</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">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 micro‐computed 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, 2010. © 2010 Wiley‐Liss, Inc.</div></front></TEI><affiliations><list><country><li>Afrique du Sud</li><li>Allemagne</li><li>Australie</li><li>Belgique</li><li>Croatie</li><li>Espagne</li><li>Finlande</li><li>France</li><li>États-Unis</li></country><region><li>Auvergne-Rhône-Alpes</li><li>District de Leipzig</li><li>Gauteng</li><li>Massachusetts</li><li>Rhône-Alpes</li><li>Saxe (Land)</li><li>Uusimaa</li><li>État de New York</li></region><settlement><li>Grenoble</li><li>Helsinki</li><li>Johannesbourg</li><li>Leipzig</li></settlement><orgName><li>Université d'Helsinki</li><li>Université du Witwatersrand</li></orgName></list><tree><country name="Allemagne"><region name="Saxe (Land)"><name sortKey="Skinner, Matthew M" sort="Skinner, Matthew M" uniqKey="Skinner M" first="Matthew M." last="Skinner">Matthew M. Skinner</name></region><name sortKey="Hublin, Jean Acques" sort="Hublin, Jean Acques" uniqKey="Hublin J" first="Jean-Jacques" last="Hublin">Jean-Jacques Hublin</name><name sortKey="Kupczik, Kornelius" sort="Kupczik, Kornelius" uniqKey="Kupczik K" first="Kornelius" last="Kupczik">Kornelius Kupczik</name><name sortKey="Olejniczak, Anthony J" sort="Olejniczak, Anthony J" uniqKey="Olejniczak A" first="Anthony J." last="Olejniczak">Anthony J. Olejniczak</name><name sortKey="Skinner, Matthew M" sort="Skinner, Matthew M" uniqKey="Skinner M" first="Matthew M." last="Skinner">Matthew M. Skinner</name><name sortKey="Skinner, Matthew M" sort="Skinner, Matthew M" uniqKey="Skinner M" first="Matthew M." last="Skinner">Matthew M. Skinner</name><name sortKey="Smith, Tanya" sort="Smith, Tanya" uniqKey="Smith T" first="Tanya" last="Smith">Tanya Smith</name></country><country name="Australie"><noRegion><name sortKey="Evans, Alistair" sort="Evans, Alistair" uniqKey="Evans A" first="Alistair" last="Evans">Alistair Evans</name></noRegion></country><country name="États-Unis"><region name="Massachusetts"><name sortKey="Smith, Tanya" sort="Smith, Tanya" uniqKey="Smith T" first="Tanya" last="Smith">Tanya Smith</name></region><name sortKey="Jernvall, Jukka" sort="Jernvall, Jukka" uniqKey="Jernvall J" first="Jukka" last="Jernvall">Jukka Jernvall</name></country><country name="Finlande"><region name="Uusimaa"><name sortKey="Jernvall, Jukka" sort="Jernvall, Jukka" uniqKey="Jernvall J" first="Jukka" last="Jernvall">Jukka Jernvall</name></region></country><country name="France"><region name="Auvergne-Rhône-Alpes"><name sortKey="Tafforeau, Paul" sort="Tafforeau, Paul" uniqKey="Tafforeau P" first="Paul" last="Tafforeau">Paul Tafforeau</name></region></country><country name="Espagne"><noRegion><name sortKey="Olejniczak, Anthony J" sort="Olejniczak, Anthony J" uniqKey="Olejniczak A" first="Anthony J." last="Olejniczak">Anthony J. Olejniczak</name></noRegion><name sortKey="Rosas, Antonio" sort="Rosas, Antonio" uniqKey="Rosas A" first="Antonio" last="Rosas">Antonio Rosas</name></country><country name="Croatie"><noRegion><name sortKey="Radov I, Jakov" sort="Radov I, Jakov" uniqKey="Radov I J" first="Jakov" last="Radov I">Jakov Radov I</name></noRegion></country><country name="Afrique du Sud"><region name="Gauteng"><name sortKey="Thackeray, J Francis" sort="Thackeray, J Francis" uniqKey="Thackeray J" first="J. Francis" last="Thackeray">J. Francis Thackeray</name></region></country><country name="Belgique"><noRegion><name sortKey="Toussaint, Michel" sort="Toussaint, Michel" uniqKey="Toussaint M" first="Michel" last="Toussaint">Michel Toussaint</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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