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@ARTICLE{Zaouali:641241,
author = {Zaouali, Ameni and Gloaguen, David and Le Bourhis, Eric and
Dubos, Pierre-Antoine and Moya, Marie-José and
Schwartzkopf, Matthias and Snow, Tim and Schneider, Konrad
and Chang, Baobao and Jordana, Fabienne and Tessier, Solène
and Tournier, Pierre and Paré, Arnaud and Weiss, Pierre and
Geoffroy, Valérie and Girault, Baptiste},
title = {{R}estoration of hydroxyapatite particle thickness and
crystalline orientation does not lead to recovery of
tissue-scale mechanical properties in regenerating rat
calvarial bone defects},
journal = {Journal of the mechanical behavior of biomedical materials},
volume = {168},
issn = {1751-6161},
address = {Amsterdam [u.a.]},
publisher = {Elsevier},
reportid = {PUBDB-2025-04972},
pages = {106998},
year = {2025},
note = {Waiting for fulltext},
abstract = {Various cellular activities regulate bone healing, causing
structural changes and evolving mechanical characteristics
during the regeneration process. This pilot study aimed to
correlate the time- and space-resolved mechanical behavior
of regenerating and related biological processes. While the
mechanical properties of bone are known to be based on a
nanostructure organization, this study intends to highlight
the evolution of the strain distribution induced by the
reconstruction process, which is mainly driven by the
mineral part (i.e., hydroxyapatite) of the bone
architecture. Multiscale mechanical (tensile and
nanoindentation tests) and biological (X-ray microtomography
measurements and histological observations) characterization
methods were applied to 3 mm rat cranial defects, one of the
most reproducible animal models used to assess bone
regeneration, filled with bone grafts, the gold standard for
bone repair. The size and crystallographic orientation of
the hydroxyapatite particles as well as their lattice
(elastic) strain distribution under tensile loading were
investigated through in situ synchrotron wide-angle and
small-angle X-ray scattering measurements at various healing
stages. Analyses were completed to quantify the elastic
properties at the tissue-scale via nanoindentation
measurements. The resulting mappings of lattice strain, mean
particle thickness and crystallographic orientations
revealed how tissue evolves during bone repair. At the early
stages of the regeneration process, the microstructural
changes consisted of a restored hydroxyapatite platelet
shape and crystallographic orientation. At later stages, the
hydroxyapatite crystallographic orientation reached that of
native bone, and the mechanical function of the tissue in
the defect zone was restored at the mineral particle scale.
Nevertheless, even for the longest regeneration duration (20
weeks), mechanical properties at the tissue-scale remained
ineffective, highlighting the importance of multiscale
investigations to address this type of issue.},
cin = {DOOR ; HAS-User / FS-PETRA-D},
ddc = {570},
cid = {I:(DE-H253)HAS-User-20120731 /
I:(DE-H253)FS-PETRA-D-20210408},
pnm = {633 - Life Sciences – Building Blocks of Life: Structure
and Function (POF4-633) / 6G3 - PETRA III (DESY) (POF4-6G3)
/ FS-Proposal: I-20170353 EC (I-20170353-EC) / FS-Proposal:
I-20180931 EC (I-20180931-EC) / CALIPSOplus - Convenient
Access to Light Sources Open to Innovation, Science and to
the World (730872)},
pid = {G:(DE-HGF)POF4-633 / G:(DE-HGF)POF4-6G3 /
G:(DE-H253)I-20170353-EC / G:(DE-H253)I-20180931-EC /
G:(EU-Grant)730872},
experiment = {EXP:(DE-H253)P-P03-20150101},
typ = {PUB:(DE-HGF)16},
doi = {10.1016/j.jmbbm.2025.106998},
url = {https://bib-pubdb1.desy.de/record/641241},
}