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Composite Scaffolds of Interfacial Polyelectrolyte Fibers for Temporally Controlled Release of Biomolecules
Published on: August 19, 2015
Crosslinked poly(epsilon-caprolactone/D,L-lactide)/bioactive glass composite scaffolds for bone tissue engineering
V V Meretoja1, A O Helminen, J J Korventausta
1Department of Prosthetic Dentistry and Biomaterials Science, Institute of Dentistry, University of Turku, Lemminkäisenkatu 2, FI-20520 Turku, Finland. ville.meretoja@utu.fi
Journal of Biomedical Materials Research. Part A
|January 5, 2006
Summary
This study developed elastic polymer and bioactive glass composite scaffolds for bone tissue engineering. Caprolactone-rich scaffolds maintained integrity, while composites enhanced osteoblast response, showing promise for bone regeneration.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Polymer Chemistry
Background:
- Bone tissue engineering requires advanced scaffolds that mimic native bone properties.
- Elastic polymers offer potential for load-bearing bone defect repair.
- Bioactive glass incorporation can enhance cellular interactions and bone formation.
Purpose of the Study:
- To design and characterize elastic polymer and composite scaffolds for bone regeneration.
- To evaluate the mechanical, degradation, and in vitro biological performance of these scaffolds.
- To investigate the influence of copolymer composition and bioactive glass addition on scaffold properties.
Main Methods:
- Preparation of crosslinked copolymer matrices (poly(epsilon-caprolactone)/poly(D,L-lactide)) with varying compositions.
- Fabrication of composite scaffolds incorporating particulate bioactive glass.
- Characterization of mechanical properties (compressive modulus) and water absorption.
- In vitro evaluation in simulated body fluid and osteoblast cell cultures.
Main Results:
- Scaffold porosity ranged from 45 to 85 vol % with compressive moduli from 190 to 900 kPa.
- Lactide-rich scaffolds showed high water absorption and mechanical property loss; caprolactone-rich scaffolds maintained integrity.
- Composite scaffolds with bioactive glass exhibited improved osteoblast adhesion and mineralization compared to polymer-only scaffolds.
Conclusions:
- Poly(epsilon-caprolactone)-rich scaffolds demonstrate superior mechanical stability and controlled degradation for bone tissue engineering.
- Incorporation of bioactive glass into scaffolds enhances cellular response, promoting osteoblast activity.
- Further optimization of scaffold architecture and culture conditions is needed for improved cell infiltration and bone regeneration.
