The mechanical properties of the dentine and cement of the tusk of the narwhal Monodon monoceros compared with those of other mineralized tissues
Identifieur interne : 00B907 ( Main/Curation ); précédent : 00B906; suivant : 00B908The mechanical properties of the dentine and cement of the tusk of the narwhal Monodon monoceros compared with those of other mineralized tissues
Auteurs : K. Break [Royaume-Uni] ; J. D. Currey [Royaume-Uni] ; C. M. Pond [Royaume-Uni] ; M. A. Ramsay [Canada]Source :
- Archives of Oral Biology [ 0003-9969 ] ; 1990.
Descripteurs français
- Wicri :
- topic : Renne.
English descriptors
- KwdEn :
- Biological materials, Bowen, Calcium content, Cattle bone, Cattle cementum, Cattle dentine, Cattle femur, Cattle molar, Cattle teeth, Cementum, Cementurn, Compact bone, Currey, Dental tissues, Dentine, Fracture, Hardness, Human dentin, Human dentine, Long axis, Mechanical properties, Mineral content, Mineralization, Mineralized, Mineralized tissues, Modulus, Monodon monoceros, Narwhal, Narwhal cement, Narwhal cementum, Narwhal dentine, Narwhal tusk, Narwhal tusk tissues, Physical properties, Reindeer, Reindeer antler, Rodriguez, Strain rate, Strain rates, Tensile strength, Tusk, Ultimate strain, cementum, dentine, mechanical properties, narwhal tusk.
- Teeft :
- Biological materials, Bowen, Calcium content, Cattle bone, Cattle cementum, Cattle dentine, Cattle femur, Cattle molar, Cattle teeth, Cementum, Cementurn, Compact bone, Currey, Dental tissues, Dentine, Fracture, Hardness, Human dentin, Human dentine, Long axis, Mechanical properties, Mineral content, Mineralization, Mineralized, Mineralized tissues, Modulus, Monodon monoceros, Narwhal, Narwhal cement, Narwhal cementum, Narwhal dentine, Narwhal tusk, Narwhal tusk tissues, Physical properties, Reindeer, Reindeer antler, Rodriguez, Strain rate, Strain rates, Tensile strength, Tusk, Ultimate strain.
Abstract
Abstract: Values for Young's modulus of elasticity, ultimate and yield stresses, ultimate and yield strains, work under the stress-strain curve and work of fracture were obtained from tensile and bending tests on specimens of narwhal tusk dentine and cement, femoral bone from young and mature cattle, and reindeer antler. Compared with the cattle bone the narwhal tissues had low Young's moduli, low yield stresses, rather low ultimate stresses and high ultimate strains. In all these properties they were similar to reindeer antler. The calcium content and hardness of the narwhal tissues were compared with those of human and cattle dental tissues. The narwhal dentine was considerably softer and less mineralized than human and cattle dentine. Human cementum was softer and less mineralized than cattle cementum, and was like narwhal cementum. In general, the mechanical properties of the narwhal tusk tissues were as would be expected from their mineral content, except that the stiffness of the cementum was low. It is likely that narwhal dentine is not very similar to human and cattle dentine in its mechanical properties.
Url:
DOI: 10.1016/0003-9969(90)90027-8
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<wicri:cityArea>Department of Biology, University of York, York YO1 5DD</wicri:cityArea>
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<wicri:cityArea>Address correspondence to: Professor J. D. Currey, Department of Biology, University of York, York YO1 5DD</wicri:cityArea>
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<term>Bowen</term>
<term>Calcium content</term>
<term>Cattle bone</term>
<term>Cattle cementum</term>
<term>Cattle dentine</term>
<term>Cattle femur</term>
<term>Cattle molar</term>
<term>Cattle teeth</term>
<term>Cementum</term>
<term>Cementurn</term>
<term>Compact bone</term>
<term>Currey</term>
<term>Dental tissues</term>
<term>Dentine</term>
<term>Fracture</term>
<term>Hardness</term>
<term>Human dentin</term>
<term>Human dentine</term>
<term>Long axis</term>
<term>Mechanical properties</term>
<term>Mineral content</term>
<term>Mineralization</term>
<term>Mineralized</term>
<term>Mineralized tissues</term>
<term>Modulus</term>
<term>Monodon monoceros</term>
<term>Narwhal</term>
<term>Narwhal cement</term>
<term>Narwhal cementum</term>
<term>Narwhal dentine</term>
<term>Narwhal tusk</term>
<term>Narwhal tusk tissues</term>
<term>Physical properties</term>
<term>Reindeer</term>
<term>Reindeer antler</term>
<term>Rodriguez</term>
<term>Strain rate</term>
<term>Strain rates</term>
<term>Tensile strength</term>
<term>Tusk</term>
<term>Ultimate strain</term>
<term>cementum</term>
<term>dentine</term>
<term>mechanical properties</term>
<term>narwhal tusk</term>
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<term>Calcium content</term>
<term>Cattle bone</term>
<term>Cattle cementum</term>
<term>Cattle dentine</term>
<term>Cattle femur</term>
<term>Cattle molar</term>
<term>Cattle teeth</term>
<term>Cementum</term>
<term>Cementurn</term>
<term>Compact bone</term>
<term>Currey</term>
<term>Dental tissues</term>
<term>Dentine</term>
<term>Fracture</term>
<term>Hardness</term>
<term>Human dentin</term>
<term>Human dentine</term>
<term>Long axis</term>
<term>Mechanical properties</term>
<term>Mineral content</term>
<term>Mineralization</term>
<term>Mineralized</term>
<term>Mineralized tissues</term>
<term>Modulus</term>
<term>Monodon monoceros</term>
<term>Narwhal</term>
<term>Narwhal cement</term>
<term>Narwhal cementum</term>
<term>Narwhal dentine</term>
<term>Narwhal tusk</term>
<term>Narwhal tusk tissues</term>
<term>Physical properties</term>
<term>Reindeer</term>
<term>Reindeer antler</term>
<term>Rodriguez</term>
<term>Strain rate</term>
<term>Strain rates</term>
<term>Tensile strength</term>
<term>Tusk</term>
<term>Ultimate strain</term>
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<front><div type="abstract" xml:lang="en">Abstract: Values for Young's modulus of elasticity, ultimate and yield stresses, ultimate and yield strains, work under the stress-strain curve and work of fracture were obtained from tensile and bending tests on specimens of narwhal tusk dentine and cement, femoral bone from young and mature cattle, and reindeer antler. Compared with the cattle bone the narwhal tissues had low Young's moduli, low yield stresses, rather low ultimate stresses and high ultimate strains. In all these properties they were similar to reindeer antler. The calcium content and hardness of the narwhal tissues were compared with those of human and cattle dental tissues. The narwhal dentine was considerably softer and less mineralized than human and cattle dentine. Human cementum was softer and less mineralized than cattle cementum, and was like narwhal cementum. In general, the mechanical properties of the narwhal tusk tissues were as would be expected from their mineral content, except that the stiffness of the cementum was low. It is likely that narwhal dentine is not very similar to human and cattle dentine in its mechanical properties.</div>
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