In Situ Mechanical Behavior of Regenerating Rat Calvaria Bones Under Tensile Load via Synchrotron Diffraction Characterization

摘要

The major challenge of Research in bone surgery is to develop strategies to repair large bone defects. Bone grafting technique is the gold standard to fill and heal these kind of defects. This work address the evolution of the mechanical properties as regard to bone regeneration microstructure. Managing such a time dependent (different regeneration step) and spatially resolved (strain field across natural/reconstructed bone interface) process is achieved through a quantitative analysis of the mechanical strain distribution supported by the mineral part of bone architecture (hydroxyapatite - Hap) and crystal microstructural features (size distribution, spatial pattern). SAXS/WAXS (Small- and Wide- Angle X-ray Scattering) experiments will highlight strain distribution respectively in the reconstructed bone's collagen fibrils and minerals, through mechanical state mapping over a surgically created defect under in situ tensile testing on samples harvested at different regeneration stages.