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@ARTICLE{Stockhausen:457014,
author = {Stockhausen, Kilian E. and Qwamizadeh, Mahan and Wölfel,
Eva M. and Hemmatian, Haniyeh and Fiedler, Imke A. K. and
Flenner, Silja and Longo, Elena and Amling, Michael and
Greving, Imke and Ritchie, Robert O. and Schmidt, Felix N.
and Busse, Björn},
title = {{C}ollagen {F}iber {O}rientation {I}s {C}oupled with
{S}pecific {N}ano-{C}ompositional {P}atterns in {D}ark and
{B}right {O}steons {M}odulating {T}heir {B}iomechanical
{P}roperties},
journal = {ACS nano},
volume = {15},
number = {1},
issn = {1936-086X},
address = {Washington, DC},
publisher = {Soc.},
reportid = {PUBDB-2021-01801},
pages = {455 - 467},
year = {2021},
abstract = {Bone continuously adapts to its mechanical environment by
structural reorganization to maintain mechanical strength.
As the adaptive capabilities of bone are portrayed in its
nano- and microstructure, the existence of dark and bright
osteons with contrasting preferential collagen fiber
orientation (longitudinal and oblique-angled, respectively)
points at a required tissue heterogeneity that contributes
to the excellent fracture resistance mechanisms in bone.
Dark and bright osteons provide an exceptional opportunity
to deepen our understanding of how nanoscale tissue
properties influence and guide fracture mechanisms at larger
length scales. To this end, a comprehensive structural,
compositional, and mechanical assessment is performed using
circularly polarized light microscopy, synchrotron
nanocomputed tomography, focused ion beam/scanning electron
microscopy, quantitative backscattered electron imaging,
Fourier transform infrared spectroscopy, and nanoindentation
testing. To predict how the mechanical behavior of osteons
is affected by shifts in collagen fiber orientation, finite
element models are generated. Fundamental disparities
between both osteon types are observed: dark osteons are
characterized by a higher degree of mineralization along
with a higher ratio of inorganic to organic matrix
components that lead to higher stiffness and the ability to
resist plastic deformation under compression. On the
contrary, bright osteons contain a higher fraction of
collagen and provide enhanced ductility and energy
dissipation due to lower stiffness and hardness.},
cin = {HZG / DOOR ; HAS-User},
ddc = {540},
cid = {I:(DE-H253)HZG-20120731 / I:(DE-H253)HAS-User-20120731},
pnm = {6G3 - PETRA III (DESY) (POF4-6G3)},
pid = {G:(DE-HGF)POF4-6G3},
experiment = {EXP:(DE-H253)P-P05-20150101},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:33404232},
UT = {WOS:000613942700028},
doi = {10.1021/acsnano.0c04786},
url = {https://bib-pubdb1.desy.de/record/457014},
}