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Fabrication of poly(alpha-hydroxy acid) foam scaffolds using multiple solvent systems
Yunhua Hu1, David W Grainger, Shelley R Winn
1Bone Tissue Engineering Center, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
Journal of Biomedical Materials Research
|January 5, 2002
Summary
Researchers developed highly porous poly(alpha-hydroxy acid) foam scaffolds using phase separation and sublimation. These biocompatible scaffolds support osteoprecursor cell growth and differentiation, showing promise for bone tissue engineering.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Polymer Chemistry
Background:
- Developing effective scaffolds is crucial for regenerative medicine.
- Poly(alpha-hydroxy acids) offer tunable degradation properties for biomedical applications.
Purpose of the Study:
- To fabricate and characterize highly porous and interconnected poly(alpha-hydroxy acid) foam scaffolds.
- To evaluate the cytocompatibility and osteogenic potential of these scaffolds.
Main Methods:
- Utilized a phase separation multisolvent system followed by sublimation.
- Optimized fabrication parameters including solvent composition and polymer molecular weight.
- Characterized scaffold microstructure using scanning electron microscopy and mercury intrusion porosimetry.
Main Results:
- Achieved polymer foams with >90% porosity and pore sizes of 100-350 micrometers.
- Demonstrated interconnected open-pore structures.
- Confirmed scaffold non-toxicity and ability to support osteoprecursor cell attachment, proliferation, and differentiation.
Conclusions:
- Successfully fabricated biocompatible poly(alpha-hydroxy acid) foam scaffolds with desirable microstructural properties.
- These scaffolds support osteogenic differentiation, indicating potential for bone regeneration applications.