Reduced stiffness of alveolar bone in the colobine mandible
Identifieur interne : 002E91 ( Istex/Corpus ); précédent : 002E90; suivant : 002E92Reduced stiffness of alveolar bone in the colobine mandible
Auteurs : David J. Daegling ; Michael C. Granatosky ; W. Scott Mcgraw ; Andrew J. RapoffSource :
- American Journal of Physical Anthropology [ 0002-9483 ] ; 2011-03.
English descriptors
- KwdEn :
- Alveolar, Alveolar basal colobus polykomos, Alveolar bone, Alveolar process, American journal, Anterior corpus, Anthropol, Baboon, Badius, Basal, Basal bone, Basal corpus, Biomech, Biomechanical, Bone, Bone stiffness, Bone tissue, Bootstrap, Bootstrap procedure, Buccal, Colobine, Colobines, Colobus, Colobus polykomos, Compliant, Compliant bone, Coronal, Coronal section, Coronal sections, Corpus, Cortical, Cortical bone, Craniofacial, Craniofacial skeleton, Daegling, Dechow, Directional dependence, Elastic modulus, Elastic properties, Fatigue life, Greater compliance, Human mandible, Hylander, Indentation, Lingual, Macaca, Macaca fascicularis, Macaque, Mandible, Mandibular, Mandibular bone, Mandibular bone stiffness, Mandibular corpus, Mandibular symphysis, Masticatory, Material properties, Material property variation, Microindentation, Midcorpus, Modulus, Modulus values, Occlusal forces, Other regions, Phys, Physical anthropology, Polykomos, Postcanine, Postcanine corpus, Primate, Primate species, Primates, Procolobus, Procolobus badius, Rapoff, Ravosa, Regional scale, Relative compliance, Resampled, Resampling, Resampling stats, Species differences, Stiffer, Stiffer bone, Stiffness, Stiffness differences, Superior symphysis, Symphyseal, Symphysis, Symphysis colobus polykomos, Transverse, Transverse sections, Variance, Vickers hardness, Wang.
- Teeft :
- Alveolar, Alveolar basal colobus polykomos, Alveolar bone, Alveolar process, American journal, Anterior corpus, Anthropol, Baboon, Badius, Basal, Basal bone, Basal corpus, Biomech, Biomechanical, Bone, Bone stiffness, Bone tissue, Bootstrap, Bootstrap procedure, Buccal, Colobine, Colobines, Colobus, Colobus polykomos, Compliant, Compliant bone, Coronal, Coronal section, Coronal sections, Corpus, Cortical, Cortical bone, Craniofacial, Craniofacial skeleton, Daegling, Dechow, Directional dependence, Elastic modulus, Elastic properties, Fatigue life, Greater compliance, Human mandible, Hylander, Indentation, Lingual, Macaca, Macaca fascicularis, Macaque, Mandible, Mandibular, Mandibular bone, Mandibular bone stiffness, Mandibular corpus, Mandibular symphysis, Masticatory, Material properties, Material property variation, Microindentation, Midcorpus, Modulus, Modulus values, Occlusal forces, Other regions, Phys, Physical anthropology, Polykomos, Postcanine, Postcanine corpus, Primate, Primate species, Primates, Procolobus, Procolobus badius, Rapoff, Ravosa, Regional scale, Relative compliance, Resampled, Resampling, Resampling stats, Species differences, Stiffer, Stiffer bone, Stiffness, Stiffness differences, Superior symphysis, Symphyseal, Symphysis, Symphysis colobus polykomos, Transverse, Transverse sections, Variance, Vickers hardness, Wang.
Abstract
Alveolar bone has several mechanical functions, including tooth support and accommodation of occlusal and other masticatory forces. Its unique functional‐mechanical environment is reflected by its structural characteristics, but whether alveolar bone is materially distinct from bone elsewhere in the primate facial skeleton is uncertain. This uncertainty is attributable not only to a limited amount of data but also to conflicting findings among these data. We evaluated elastic modulus variation in the mandibular corpus of eight adult specimens of the monkeys Procolobus badius and Colobus polykomos via microindentation to evaluate whether alveolar bone is more compliant than basal bone and to quantify patterns of variation between sexes and species. We sampled Vickers hardness from six serial transverse sections and one coronal section from both the alveolar process and the basal corpus. Hardness values were converted to elastic modulus via regressions specific for bone tissue. Analysis of variance reveals that a plurality of variation is found on a regional scale; i.e., alveolar bone is more compliant than adjacent basal bone. Species affiliation and sex are not significant sources of variation. These findings support a hypothesis that compliance of alveolar bone represents a material solution for avoiding large stress concentrations arising from occlusal loads. Other comparative data suggest important differences between colobine and cercopithecine mandibles in terms of bone stiffness, both overall and in terms of relative stiffness of alveolar and basal cortical bone. Am J Phys Anthropol, 2011. © 2010 Wiley‐Liss, Inc.
Url:
DOI: 10.1002/ajpa.21423
Links to Exploration step
ISTEX:5F9324BEF52EA3028E7800C662D547E39F9BF4CALe document en format XML
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Daegling</name><affiliation><mods:affiliation>Department of Anthropology, University of Florida, Gainesville, FL 32611‐7305</mods:affiliation></affiliation><affiliation><mods:affiliation>E-mail: daegling@ufl.edu</mods:affiliation></affiliation><affiliation><mods:affiliation>Correspondence address: Department of Anthropology, University of Florida, 1112 Turlington Hall, Gainesville, FL 32611‐7305</mods:affiliation></affiliation></author><author><name sortKey="Granatosky, Michael C" sort="Granatosky, Michael C" uniqKey="Granatosky M" first="Michael C." last="Granatosky">Michael C. Granatosky</name><affiliation><mods:affiliation>Department of Anthropology, University of Florida, Gainesville, FL 32611‐7305</mods:affiliation></affiliation></author><author><name sortKey="Mcgraw, W Scott" sort="Mcgraw, W Scott" uniqKey="Mcgraw W" first="W. Scott" last="Mcgraw">W. 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xml:lang="en"><term>Alveolar</term><term>Alveolar basal colobus polykomos</term><term>Alveolar bone</term><term>Alveolar process</term><term>American journal</term><term>Anterior corpus</term><term>Anthropol</term><term>Baboon</term><term>Badius</term><term>Basal</term><term>Basal bone</term><term>Basal corpus</term><term>Biomech</term><term>Biomechanical</term><term>Bone</term><term>Bone stiffness</term><term>Bone tissue</term><term>Bootstrap</term><term>Bootstrap procedure</term><term>Buccal</term><term>Colobine</term><term>Colobines</term><term>Colobus</term><term>Colobus polykomos</term><term>Compliant</term><term>Compliant bone</term><term>Coronal</term><term>Coronal section</term><term>Coronal sections</term><term>Corpus</term><term>Cortical</term><term>Cortical bone</term><term>Craniofacial</term><term>Craniofacial skeleton</term><term>Daegling</term><term>Dechow</term><term>Directional dependence</term><term>Elastic modulus</term><term>Elastic properties</term><term>Fatigue life</term><term>Greater compliance</term><term>Human mandible</term><term>Hylander</term><term>Indentation</term><term>Lingual</term><term>Macaca</term><term>Macaca fascicularis</term><term>Macaque</term><term>Mandible</term><term>Mandibular</term><term>Mandibular bone</term><term>Mandibular bone stiffness</term><term>Mandibular corpus</term><term>Mandibular symphysis</term><term>Masticatory</term><term>Material properties</term><term>Material property variation</term><term>Microindentation</term><term>Midcorpus</term><term>Modulus</term><term>Modulus values</term><term>Occlusal forces</term><term>Other regions</term><term>Phys</term><term>Physical anthropology</term><term>Polykomos</term><term>Postcanine</term><term>Postcanine corpus</term><term>Primate</term><term>Primate species</term><term>Primates</term><term>Procolobus</term><term>Procolobus badius</term><term>Rapoff</term><term>Ravosa</term><term>Regional scale</term><term>Relative compliance</term><term>Resampled</term><term>Resampling</term><term>Resampling stats</term><term>Species differences</term><term>Stiffer</term><term>Stiffer bone</term><term>Stiffness</term><term>Stiffness differences</term><term>Superior symphysis</term><term>Symphyseal</term><term>Symphysis</term><term>Symphysis colobus polykomos</term><term>Transverse</term><term>Transverse sections</term><term>Variance</term><term>Vickers hardness</term><term>Wang</term></keywords><keywords scheme="Teeft" xml:lang="en"><term>Alveolar</term><term>Alveolar basal colobus polykomos</term><term>Alveolar bone</term><term>Alveolar process</term><term>American journal</term><term>Anterior corpus</term><term>Anthropol</term><term>Baboon</term><term>Badius</term><term>Basal</term><term>Basal bone</term><term>Basal corpus</term><term>Biomech</term><term>Biomechanical</term><term>Bone</term><term>Bone stiffness</term><term>Bone tissue</term><term>Bootstrap</term><term>Bootstrap procedure</term><term>Buccal</term><term>Colobine</term><term>Colobines</term><term>Colobus</term><term>Colobus polykomos</term><term>Compliant</term><term>Compliant bone</term><term>Coronal</term><term>Coronal section</term><term>Coronal sections</term><term>Corpus</term><term>Cortical</term><term>Cortical bone</term><term>Craniofacial</term><term>Craniofacial skeleton</term><term>Daegling</term><term>Dechow</term><term>Directional dependence</term><term>Elastic modulus</term><term>Elastic properties</term><term>Fatigue life</term><term>Greater compliance</term><term>Human mandible</term><term>Hylander</term><term>Indentation</term><term>Lingual</term><term>Macaca</term><term>Macaca fascicularis</term><term>Macaque</term><term>Mandible</term><term>Mandibular</term><term>Mandibular bone</term><term>Mandibular bone stiffness</term><term>Mandibular corpus</term><term>Mandibular symphysis</term><term>Masticatory</term><term>Material properties</term><term>Material property 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hardness</term><term>Wang</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Alveolar bone has several mechanical functions, including tooth support and accommodation of occlusal and other masticatory forces. Its unique functional‐mechanical environment is reflected by its structural characteristics, but whether alveolar bone is materially distinct from bone elsewhere in the primate facial skeleton is uncertain. This uncertainty is attributable not only to a limited amount of data but also to conflicting findings among these data. We evaluated elastic modulus variation in the mandibular corpus of eight adult specimens of the monkeys Procolobus badius and Colobus polykomos via microindentation to evaluate whether alveolar bone is more compliant than basal bone and to quantify patterns of variation between sexes and species. We sampled Vickers hardness from six serial transverse sections and one coronal section from both the alveolar process and the basal corpus. Hardness values were converted to elastic modulus via regressions specific for bone tissue. Analysis of variance reveals that a plurality of variation is found on a regional scale; i.e., alveolar bone is more compliant than adjacent basal bone. Species affiliation and sex are not significant sources of variation. These findings support a hypothesis that compliance of alveolar bone represents a material solution for avoiding large stress concentrations arising from occlusal loads. Other comparative data suggest important differences between colobine and cercopithecine mandibles in terms of bone stiffness, both overall and in terms of relative stiffness of alveolar and basal cortical bone. Am J Phys Anthropol, 2011. © 2010 Wiley‐Liss, Inc.</div></front></TEI><istex><corpusName>wiley</corpusName><keywords><teeft><json:string>basal</json:string><json:string>modulus</json:string><json:string>alveolar bone</json:string><json:string>coronal</json:string><json:string>colobus</json:string><json:string>daegling</json:string><json:string>mandibular</json:string><json:string>procolobus</json:string><json:string>badius</json:string><json:string>polykomos</json:string><json:string>symphysis</json:string><json:string>indentation</json:string><json:string>mandible</json:string><json:string>stiffness</json:string><json:string>midcorpus</json:string><json:string>wang</json:string><json:string>hylander</json:string><json:string>dechow</json:string><json:string>alveolar process</json:string><json:string>lingual</json:string><json:string>buccal</json:string><json:string>colobus polykomos</json:string><json:string>transverse sections</json:string><json:string>compliant</json:string><json:string>colobine</json:string><json:string>microindentation</json:string><json:string>rapoff</json:string><json:string>procolobus badius</json:string><json:string>elastic modulus</json:string><json:string>symphyseal</json:string><json:string>coronal sections</json:string><json:string>basal bone</json:string><json:string>anthropol</json:string><json:string>phys</json:string><json:string>craniofacial</json:string><json:string>biomech</json:string><json:string>resampling</json:string><json:string>cortical bone</json:string><json:string>masticatory</json:string><json:string>baboon</json:string><json:string>basal corpus</json:string><json:string>ravosa</json:string><json:string>postcanine</json:string><json:string>colobines</json:string><json:string>bone stiffness</json:string><json:string>bootstrap</json:string><json:string>alveolar</json:string><json:string>mandibular bone</json:string><json:string>biomechanical</json:string><json:string>macaque</json:string><json:string>macaca</json:string><json:string>resampled</json:string><json:string>american journal</json:string><json:string>variance</json:string><json:string>primate</json:string><json:string>stiffer</json:string><json:string>stiffer bone</json:string><json:string>mandibular corpus</json:string><json:string>coronal section</json:string><json:string>postcanine corpus</json:string><json:string>physical anthropology</json:string><json:string>superior symphysis</json:string><json:string>modulus values</json:string><json:string>directional dependence</json:string><json:string>compliant bone</json:string><json:string>material properties</json:string><json:string>mandibular symphysis</json:string><json:string>greater compliance</json:string><json:string>elastic properties</json:string><json:string>bootstrap procedure</json:string><json:string>species differences</json:string><json:string>stiffness differences</json:string><json:string>material property variation</json:string><json:string>fatigue life</json:string><json:string>transverse</json:string><json:string>primates</json:string><json:string>alveolar basal colobus polykomos</json:string><json:string>craniofacial skeleton</json:string><json:string>other regions</json:string><json:string>human mandible</json:string><json:string>macaca fascicularis</json:string><json:string>relative compliance</json:string><json:string>mandibular bone stiffness</json:string><json:string>bone tissue</json:string><json:string>vickers hardness</json:string><json:string>anterior corpus</json:string><json:string>resampling stats</json:string><json:string>occlusal forces</json:string><json:string>symphysis colobus polykomos</json:string><json:string>primate species</json:string><json:string>regional scale</json:string><json:string>corpus</json:string><json:string>cortical</json:string><json:string>bone</json:string></teeft></keywords><author><json:item><name>David J. Daegling</name><affiliations><json:string>Department of Anthropology, University of Florida, Gainesville, FL 32611‐7305</json:string><json:string>E-mail: daegling@ufl.edu</json:string><json:string>Correspondence address: Department of Anthropology, University of Florida, 1112 Turlington Hall, Gainesville, FL 32611‐7305</json:string></affiliations></json:item><json:item><name>Michael C. Granatosky</name><affiliations><json:string>Department of Anthropology, University of Florida, Gainesville, FL 32611‐7305</json:string></affiliations></json:item><json:item><name>W. Scott McGraw</name><affiliations><json:string>Department of Anthropology, The Ohio State University, 4064 Smith Laboratory, Columbus, OH 43210</json:string></affiliations></json:item><json:item><name>Andrew J. Rapoff</name><affiliations><json:string>Department of Mechanical Engineering, Union College, Schenectady, NY 12308</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>biomechanics</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>mastication</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>stress</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>strain</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>primates</value></json:item></subject><articleId><json:string>AJPA21423</json:string></articleId><arkIstex>ark:/67375/WNG-B17XZBH0-C</arkIstex><language><json:string>eng</json:string></language><originalGenre><json:string>article</json:string></originalGenre><abstract>Alveolar bone has several mechanical functions, including tooth support and accommodation of occlusal and other masticatory forces. Its unique functional‐mechanical environment is reflected by its structural characteristics, but whether alveolar bone is materially distinct from bone elsewhere in the primate facial skeleton is uncertain. This uncertainty is attributable not only to a limited amount of data but also to conflicting findings among these data. We evaluated elastic modulus variation in the mandibular corpus of eight adult specimens of the monkeys Procolobus badius and Colobus polykomos via microindentation to evaluate whether alveolar bone is more compliant than basal bone and to quantify patterns of variation between sexes and species. We sampled Vickers hardness from six serial transverse sections and one coronal section from both the alveolar process and the basal corpus. Hardness values were converted to elastic modulus via regressions specific for bone tissue. Analysis of variance reveals that a plurality of variation is found on a regional scale; i.e., alveolar bone is more compliant than adjacent basal bone. Species affiliation and sex are not significant sources of variation. These findings support a hypothesis that compliance of alveolar bone represents a material solution for avoiding large stress concentrations arising from occlusal loads. Other comparative data suggest important differences between colobine and cercopithecine mandibles in terms of bone stiffness, both overall and in terms of relative stiffness of alveolar and basal cortical bone. Am J Phys Anthropol, 2011. © 2010 Wiley‐Liss, Inc.</abstract><qualityIndicators><score>9.88</score><pdfWordCount>7657</pdfWordCount><pdfCharCount>51306</pdfCharCount><pdfVersion>1.3</pdfVersion><pdfPageCount>11</pdfPageCount><pdfPageSize>612 x 810 pts</pdfPageSize><refBibsNative>true</refBibsNative><abstractWordCount>240</abstractWordCount><abstractCharCount>1646</abstractCharCount><keywordCount>5</keywordCount></qualityIndicators><title>Reduced stiffness of alveolar bone in the colobine mandible</title><pmid><json:string>21302268</json:string></pmid><genre><json:string>article</json:string></genre><host><title>American Journal of Physical Anthropology</title><language><json:string>unknown</json:string></language><doi><json:string>10.1002/(ISSN)1096-8644</json:string></doi><issn><json:string>0002-9483</json:string></issn><eissn><json:string>1096-8644</json:string></eissn><publisherId><json:string>AJPA</json:string></publisherId><volume>144</volume><issue>3</issue><pages><first>421</first><last>431</last><total>11</total></pages><genre><json:string>journal</json:string></genre><subject><json:item><value>Research Article</value></json:item></subject></host><namedEntities><unitex><date><json:string>2011</json:string></date><geogName></geogName><orgName><json:string>Upper Guinea Red Colobus, and Colobus</json:string><json:string>Ohio State University</json:string><json:string>Princeton University</json:string><json:string>Cambridge University</json:string><json:string>Smith Laboratory, Columbus, OH</json:string><json:string>LISS, INC</json:string><json:string>American Journal of Physical Anthropology Specimen TABLE</json:string><json:string>Indiana University</json:string><json:string>Wiley-Liss, Inc.</json:string><json:string>American Journal of Physical</json:string><json:string>Resampling Stats, Inc</json:string><json:string>University of Florida</json:string><json:string>American Journal of Physical Anthropology</json:string><json:string>Conservation International</json:string><json:string>Department of Anthropology, University of Florida, Gainesville, FL</json:string><json:string>Yerkes National Primate Research Centers</json:string></orgName><orgName_funder></orgName_funder><orgName_provider></orgName_provider><persName><json:string>Scott McGraw</json:string><json:string>Michael C. Granatosky</json:string><json:string>Indiana Conference</json:string><json:string>Fs</json:string><json:string>Tai Forest</json:string><json:string>Anderson Bitty</json:string><json:string>David J. Daegling</json:string><json:string>Andrew J. Rapoff</json:string><json:string>Anthropology</json:string><json:string>Nat Mater</json:string></persName><placeName><json:string>Abidjan</json:string><json:string>Ivory Coast</json:string><json:string>Richmond</json:string><json:string>York</json:string><json:string>Hof</json:string><json:string>Cambridge</json:string><json:string>Indianapolis</json:string><json:string>Elasticity</json:string></placeName><ref_url></ref_url><ref_bibl><json:string>Daegling et al., 2008</json:string><json:string>Wang et al. (2006)</json:string><json:string>Norman et al. 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Scott</forename><surname>McGraw</surname></persName><affiliation>Department of Anthropology, The Ohio State University, 4064 Smith Laboratory, Columbus, OH 43210<address><country key="US"></country></address></affiliation></author><author xml:id="author-0003"><persName><forename type="first">Andrew J.</forename><surname>Rapoff</surname></persName><affiliation>Department of Mechanical Engineering, Union College, Schenectady, NY 12308<address><country key="US"></country></address></affiliation></author><idno type="istex">5F9324BEF52EA3028E7800C662D547E39F9BF4CA</idno><idno type="ark">ark:/67375/WNG-B17XZBH0-C</idno><idno type="DOI">10.1002/ajpa.21423</idno><idno type="unit">AJPA21423</idno><idno type="toTypesetVersion">file:AJPA.AJPA21423.pdf</idno></analytic><monogr><title level="j" type="main">American Journal of Physical Anthropology</title><title level="j" type="alt">AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY</title><idno type="pISSN">0002-9483</idno><idno type="eISSN">1096-8644</idno><idno type="book-DOI">10.1002/(ISSN)1096-8644</idno><idno type="book-part-DOI">10.1002/ajpa.v144.3</idno><idno type="product">AJPA</idno><imprint><biblScope unit="vol">144</biblScope><biblScope unit="issue">3</biblScope><biblScope unit="page" from="421">421</biblScope><biblScope unit="page" to="431">431</biblScope><biblScope unit="page-count">11</biblScope><publisher>Wiley Subscription Services, Inc., A Wiley Company</publisher><pubPlace>Hoboken</pubPlace><date type="published" when="2011-03"></date></imprint></monogr></biblStruct></sourceDesc></fileDesc><profileDesc><abstract xml:lang="en" style="main"><head>Abstract</head><p>Alveolar bone has several mechanical functions, including tooth support and accommodation of occlusal and other masticatory forces. Its unique functional‐mechanical environment is reflected by its structural characteristics, but whether alveolar bone is materially distinct from bone elsewhere in the primate facial skeleton is uncertain. This uncertainty is attributable not only to a limited amount of data but also to conflicting findings among these data. We evaluated elastic modulus variation in the mandibular corpus of eight adult specimens of the monkeys <hi rend="italic">Procolobus badius</hi> and <hi rend="italic">Colobus polykomos</hi> via microindentation to evaluate whether alveolar bone is more compliant than basal bone and to quantify patterns of variation between sexes and species. We sampled Vickers hardness from six serial transverse sections and one coronal section from both the alveolar process and the basal corpus. Hardness values were converted to elastic modulus via regressions specific for bone tissue. Analysis of variance reveals that a plurality of variation is found on a regional scale; i.e., alveolar bone is more compliant than adjacent basal bone. Species affiliation and sex are not significant sources of variation. These findings support a hypothesis that compliance of alveolar bone represents a material solution for avoiding large stress concentrations arising from occlusal loads. Other comparative data suggest important differences between colobine and cercopithecine mandibles in terms of bone stiffness, both overall and in terms of relative stiffness of alveolar and basal cortical bone. 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Its unique functional‐mechanical environment is reflected by its structural characteristics, but whether alveolar bone is materially distinct from bone elsewhere in the primate facial skeleton is uncertain. This uncertainty is attributable not only to a limited amount of data but also to conflicting findings among these data. We evaluated elastic modulus variation in the mandibular corpus of eight adult specimens of the monkeys <i>Procolobus badius</i> and <i>Colobus polykomos</i> via microindentation to evaluate whether alveolar bone is more compliant than basal bone and to quantify patterns of variation between sexes and species. We sampled Vickers hardness from six serial transverse sections and one coronal section from both the alveolar process and the basal corpus. Hardness values were converted to elastic modulus via regressions specific for bone tissue. Analysis of variance reveals that a plurality of variation is found on a regional scale; i.e., alveolar bone is more compliant than adjacent basal bone. Species affiliation and sex are not significant sources of variation. These findings support a hypothesis that compliance of alveolar bone represents a material solution for avoiding large stress concentrations arising from occlusal loads. Other comparative data suggest important differences between colobine and cercopithecine mandibles in terms of bone stiffness, both overall and in terms of relative stiffness of alveolar and basal cortical bone. 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Its unique functional‐mechanical environment is reflected by its structural characteristics, but whether alveolar bone is materially distinct from bone elsewhere in the primate facial skeleton is uncertain. This uncertainty is attributable not only to a limited amount of data but also to conflicting findings among these data. We evaluated elastic modulus variation in the mandibular corpus of eight adult specimens of the monkeys Procolobus badius and Colobus polykomos via microindentation to evaluate whether alveolar bone is more compliant than basal bone and to quantify patterns of variation between sexes and species. We sampled Vickers hardness from six serial transverse sections and one coronal section from both the alveolar process and the basal corpus. Hardness values were converted to elastic modulus via regressions specific for bone tissue. Analysis of variance reveals that a plurality of variation is found on a regional scale; i.e., alveolar bone is more compliant than adjacent basal bone. Species affiliation and sex are not significant sources of variation. These findings support a hypothesis that compliance of alveolar bone represents a material solution for avoiding large stress concentrations arising from occlusal loads. Other comparative data suggest important differences between colobine and cercopithecine mandibles in terms of bone stiffness, both overall and in terms of relative stiffness of alveolar and basal cortical bone. 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