Elastic modulus variation in mandibular bone

A microindentation study of Macaca fascicularis

Dados Bibliográficos

ID8311802
AutoresAndrew J Rapoff (0000-0002-4776-1910, Union College, autor correspondente), Renaud G Rinaldi (0000-0001-7066-891X, Massachusetts Institute of Technology), Jennifer L Hotzman (University of Florida), David J Daegling (0000-0002-0108-8986, University of Florida)
Ano2008
Volume135
Fascículo1
Páginas100-109
Data de publicação2008-01-01
Peer ReviewedSim
Open AccessSim
TipoARTICLE
PeriódicoAmerican Journal of Physical Anthropology (JOURNAL)
Identificadores do periódicoISSN: 0002-9483 • E-ISSN: 1096-8644
EditoraWiley (PUBLISHER • GB)
DOI10.1002/ajpa.20714
PMID18058791
OpenAlexW2078291642
IdiomaEN
Citações recebidas12
Referências citadas33

We characterized the heterogeneous anisotropic elastic properties of mandibular bone in an adult female specimen of Macaca fascicularis using the technique of microindentation. This approach used an indenter of known mass and geometry to sample bone hardness at a spatial resolution in the order of 100 μm. Hardness values were converted to elastic modulus using empirically derived regression. We determined properties in alveolar, midcorpus, and basal regions of coronal and transverse sections taken from multiple locations along the corpus and ramus. Within sections, we determined properties from endosteal, midcortical, and periosteal regions. We found regional variations in bone structure, including bands of orthotropic circumferential lamellar bone at the endosteal and periosteal corpus base, angular region, and ramus. Transversely isotropic osteonal bone characterizes the midcortices of alveolar and basal regions, with many resorption spaces in alveolar regions restricting sampling opportunities. Regional variations in elasticity include relatively compliant bone in the anterior corpus and ramus. Basal cortical bone is stiffer longitudinally than transversely or superoinferiorly, while the evidence for directional dependence in alveolar bone is equivocal. Alveolar bone appears to be relatively compliant with respect to bone found in midcorpus or basal regions. Considerable variation exists in structure and material properties on a highly localized scale, more so than is discernible through conventional approaches for determining material property variation. Am J Phys Anthropol, 2008. © 2007 Wiley‐Liss, Inc

Anisotropy · Biology · Composite material · Cortical bone · Dental alveolus · Elastic modulus · Elasticity (physics) · Finite element method · Optics · Orthotropic material · Physics · Transverse isotropy · Anatomy · Dentistry · Evolution and Paleontology Studies · Materials Science · Medicine · Morphological variations and asymmetry · Paleontology and Evolutionary Biology