| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Kerschnitzki, M.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2018Correlations between nanostructure and micromechanical properties of healing bonecitations
- 2013Architecture of the osteocyte network correlates with bone material qualitycitations
- 2013Intrafibrillar plasticity through mineral/collagen sliding is the dominant mechanism for the extreme toughness of antler bonecitations
- 2012X-ray vector radiography for bone micro-architecture diagnosticscitations
- 2012Synchrotron 3D SAXS analysis of bone nanostructurecitations
- 2012Keynote: Multi-mode imaging of bone and fracture callus
- 2012Accelerated Growth Plate Mineralization and Foreshortened Proximal Limb Bones in Fetuin-A Knockout Micecitations
- 2011Poorly Ordered Bone as an Endogenous Scaffold for the Deposition of Highly Oriented Lamellar Tissue in Rapidly Growing Ovine Bonecitations
- 2011The organization of the osteocyte network mirrors the extracellular matrix orientation in bonecitations
- 2010Mechanisms of Bone Deformation and Fracturecitations
- 2009Nanoscale deformation mechanisms in bonecitations
- 2009Digital image correlation shows localized deformation bands in inelastic loading of fibrolamellar bonecitations
- 2007Evidence for an elementary process in bone plasticity with an activation enthalpy of 1 eVcitations
Places of action
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article
Poorly Ordered Bone as an Endogenous Scaffold for the Deposition of Highly Oriented Lamellar Tissue in Rapidly Growing Ovine Bone
Abstract
The mechanical properties of bone are known to depend on its structure at all length scales. In large animals, such as sheep, cortical bone grows very quickly and it is known that this occurs in 2 stages whereby a poorly ordered (mostly woven) bone structure is initially deposited and later augmented and partially replaced by parallel fibered and lamellar bone with much improved mechanical properties, often called primary osteons. Most interestingly, a similar sequence of events has also recently been observed during callus formation in a sheep osteotomy model. This has prompted the idea that fast intramembranous bone formation requires an intermediate step where bone with a lower degree of collagen orientation is deposited first as a substrate for osteoblasts to coordinate the synthesis of lamellar tissue. Since some osteoblasts become embedded in the mineralizing collagen matrix which they synthesize, the resulting osteocyte network is a direct image of the location of osteoblasts during bone formation. Using 3-dimensional imaging of osteocyte networks as well as tissue characterization by polarized light microscopy and backscattered electron imaging, we revisit the structure of growing plexiform (fibrolamellar) bone and callus in sheep. We show that bone deposited initially is based on osteocytes without spatial correlation and encased in poorly ordered matrix. Bone deposited on top of this has lamellar collagen orientation as well as a layered arrangement of osteocytes, both parallel to the surfaces of the initial tissue. This supports the hypothesis that the initial bone constitutes an endogenous scaffold for the subsequent deposition of parallel fibered and lamellar bone.