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A three-phase, fully resorbable, polyester/calcium phosphate scaffold for bone tissue engineering: Evolution of
D Lickorish1, L Guan, J E Davies
1Bone Interface Group, Institute of Biomaterials and Biomedical Engineering, Room 407 Rosebrugh Building, 164 College Street, University of Toronto, Toronto, Ont., Canada M5S3G9. d.lickorish@utoronto.ca
Biomaterials
|December 15, 2006
Summary
This study introduces a new bone tissue engineering scaffold with a calcium phosphate mineral layer. This advanced biomaterial enhances cell integration and reduces adverse tissue reactions for improved bone regeneration.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Orthopedic Research
Background:
- Bone tissue engineering relies on porous scaffolds for cell support and ingrowth.
- Polymeric scaffolds often elicit adverse host responses like fibrous encapsulation.
- Existing scaffolds require optimization for enhanced in vivo performance.
Purpose of the Study:
- To evaluate a novel macroporous polymeric/calcium phosphate composite biomaterial with a surface mineral layer.
- To assess the in vivo performance of this third-generation scaffold in a rodent femoral defect model.
- To determine if the mineral layer mitigates foreign body responses and improves scaffold integration.
Main Methods:
- Development of a macroporous polymeric/calcium phosphate composite scaffold with interconnected porosity.
- Application of a surface calcium phosphate (CaP) mineral layer to the composite scaffold.
- In vivo evaluation of the modified scaffold in a rodent femoral defect model.
Main Results:
- The surface CaP mineral layer successfully eliminated fibrous tissue encapsulation and foreign body giant cell response.
- The scaffold maintained its macroporous, biodegradable, and interconnected characteristics.
- The modified scaffold demonstrated enhanced in vitro and in vivo performance compared to previous generations.
Conclusions:
- Surface modification with a CaP mineral layer significantly improves the biocompatibility of macroporous scaffolds.
- This third-generation scaffold offers a promising biomaterial for bone tissue engineering applications.
- The enhanced design facilitates host cell integration and promotes effective bone regeneration.
