Imperial College London

Professor Molly Stevens FREng

Faculty of EngineeringDepartment of Materials

Prof of Biomedical Materials&Regenerative Medicine
 
 
 
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Contact

 

+44 (0)20 7594 6804m.stevens

 
 
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Location

 

208Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Autefage:2019:10.1016/j.biomaterials.2019.03.035,
author = {Autefage, H and Allen, F and Tang, HM and Kallepitis, C and Gentleman, E and Reznikov, N and Nitiputri, K and Nommeots-Nomm, A and Young, G and Lee, PD and Pierce, BF and Wagermaier, W and Fratzl, P and Goodship, A and Jones, JR and Blunn, G and Stevens, M},
doi = {10.1016/j.biomaterials.2019.03.035},
journal = {Biomaterials},
pages = {152--162},
title = {Multiscale analyses reveal native-like lamellar bone repair and near perfect bone-contact with porous strontium-loaded bioactive glass},
url = {http://dx.doi.org/10.1016/j.biomaterials.2019.03.035},
volume = {209},
year = {2019}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - The efficient healing of critical-sized bone defects using synthetic biomaterial-based strategies is promising but remains challenging as it requires the development of biomaterials that combine a 3D porous architecture and a robust biological activity. Bioactive glasses (BGs) are attractive candidates as they stimulate a biological response that favors osteogenesis and vascularization, but amorphous 3D porous BGs are difficult to produce because conventional compositions crystallize during processing. Here, we rationally designed a porous, strontium-releasing, bioactive glass-based scaffold (pSrBG) whose composition was tailored to deliver strontium and whose properties were optimized to retain an amorphous phase, induce tissue infiltration and encourage bone formation. The hypothesis was that it would allow the repair of a critical-sized defect in an ovine model with newly-formed bone exhibiting physiological matrix composition and structural architecture. Histological and histomorphometric analyses combined with indentation testing showed pSrBG encouraged near perfect bone-to-material contact and the formation of well-organized lamellar bone. Analysis of bone quality by a combination of Raman spectral imaging, small-angle X-ray scattering, X-ray fluorescence and focused ion beam-scanning electron microscopy demonstrated that the repaired tissue was akin to that of normal, healthy bone, and incorporated small amounts of strontium in the newly formed bone mineral. These data show the potential of pSrBG to induce an efficient repair of critical-sized bone defects and establish the importance of thorough multi-scale characterization in assessing biomaterial outcomes in large animal models.
AU - Autefage,H
AU - Allen,F
AU - Tang,HM
AU - Kallepitis,C
AU - Gentleman,E
AU - Reznikov,N
AU - Nitiputri,K
AU - Nommeots-Nomm,A
AU - Young,G
AU - Lee,PD
AU - Pierce,BF
AU - Wagermaier,W
AU - Fratzl,P
AU - Goodship,A
AU - Jones,JR
AU - Blunn,G
AU - Stevens,M
DO - 10.1016/j.biomaterials.2019.03.035
EP - 162
PY - 2019///
SN - 0142-9612
SP - 152
TI - Multiscale analyses reveal native-like lamellar bone repair and near perfect bone-contact with porous strontium-loaded bioactive glass
T2 - Biomaterials
UR - http://dx.doi.org/10.1016/j.biomaterials.2019.03.035
UR - http://hdl.handle.net/10044/1/69687
VL - 209
ER -