Abstract
Regenerative reconstruction of critical-size long bone segmental defects (LBSD) arising from high-energy traumas or tumor resections presents a formidable clinical challenge and imposes tremendous burdens to the healthcare systems worldwide. Standard treatment modalities like autologous cancellous bone grafting and allogenic cortical bone grafting are inadequate for LBSD due to limited supplies and suboptimal in vivo resorption of the former and poor fixation/tissue integration of the latter, respectively. These limitations have inspired the design of new synthetic bone grafts that integrate osteoinductivity and osteoconductivity with desired handling characteristics and controlled biodegradability. This chapter first outlines periosteal surface engineering strategies aimed at improving the in vivo performance of structural allografts, then reviews recent advances in synthetic bone grafts composed of demineralized bone matrices, titanium mesh cages, bioceramics, natural polymers, or synthetic polymers and composites. The discussions are centered around their applications for the regenerative repair of critical-size LBSD, contrasting their functional regeneration outcomes (e.g. restoration of mechanical integrity, quantification of new bone formation), whenever possible, with those achieved by clinical standards or to health controls.
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Abbreviations
- 3D printing:
-
Three-dimensional printing
- ACS:
-
Absorbable collagen sponge
- ADSC:
-
Adipose-derived stem cell
- BMP:
-
Bone morphogenetic protein
- BMSC:
-
Bone marrow-derived stromal cell
- CAD:
-
Computer-assisted design
- CaP:
-
Calcium phosphate
- CT:
-
Computer tomography
- DBM:
-
Demineralized bone matrix
- ECM:
-
Extracellular matrix
- FDA:
-
Food and Drug Administration
- FGF23:
-
Fibroblast growth factor 23
- HA:
-
Hyaluronic acid
- hAFSC:
-
Human amniotic fluid-derived stem cell
- HAp:
-
Hydroxyapatite
- HDB:
-
Heterogeneous deproteinized bone
- Ihh:
-
Indian hedgehog
- LBSD:
-
Long bone segmental defect
- MSC:
-
Mesenchymal stem cell
- mSSC:
-
Mouse skeletal stem cell
- OVX:
-
Ovariectomy
- PCL:
-
Polycaprolactone
- PEG:
-
Poly(ethylene glycol)
- PEGDA:
-
Poly(ethylene glycol) diacrylate
- PELGA:
-
Poly(lactic-co-glycolic acid)-b-poly(ethylene glycol)-b-poly(lactic-co-glycolic acid)
- PGA:
-
Poly(glycolic acid)
- PLGA:
-
Poly(lactic-co-glycolic acid)
- PLA:
-
Poly(lactic acid)
- PLA-DX-PEG:
-
Poly d,l-lactic acid-p-dioxanone-polyethylene glycol block copolymer
- PVA:
-
Poly(vinyl alcohol)
- rAAV:
-
Recombinant adeno-associated virus
- RANKL:
-
Receptor activator of nuclear factor κB ligand
- rhBMP-2:
-
Recombinant human bone morphogenetic protein-2
- rhBMP-2/7:
-
Recombinant human bone morphogenetic protein-2/7 heterodimer
- rt:
-
Room temperature
- TCP:
-
Tricalcium phosphate
- TEP:
-
Tissue-engineered periosteum
- VEGF:
-
Vascular endothelial growth factor
- WSF:
-
Wistar skin fibroblast
- β-TCP:
-
β-Tricalcium phosphate
- μ-CT:
-
Micro-computed tomography
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Acknowledgements
This work is supported by an Alex Lemonade Stand Foundation Innovation Grant and a BRIDGE Award from the University of Massachusetts Medical School.
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Xu, X., Song, J. (2022). Bone Grafting in the Regenerative Reconstruction of Critical-Size Long Bone Segmental Defects. In: Guastaldi, F.P., Mahadik, B. (eds) Bone Tissue Engineering. Springer, Cham. https://doi.org/10.1007/978-3-030-92014-2_8
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