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Published on: September 11, 2015
Use of a biomimetic strategy to engineer bone
C E Holy1, J A Fialkov, J E Davies
1Institute for Biomaterials and Biomedical Engineering, University of Toronto, 4 Taddle Creek Road, Toronto, Ontario, Canada M5S 3G9.
Journal of Biomedical Materials Research. Part A
|May 23, 2003
Summary
This study engineered bone tissue using novel biodegradable scaffolds and bone marrow cells. The technique successfully repaired bone defects in rabbits without growth factors, achieving functional bone formation.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Orthopedic Surgery
Background:
- Engineering three-dimensional (3D) bone tissue within biodegradable polymer scaffolds presents a significant challenge in regenerative medicine.
- Current methods often require supplementary growth factors, increasing complexity and cost.
Purpose of the Study:
- To develop a novel biodegradable scaffold with a trabecular-like geometry for 3D bone tissue engineering.
- To evaluate the efficacy of these scaffolds in promoting bone regeneration in a rabbit model without exogenous growth factors.
Main Methods:
- A novel processing technique was employed to create biodegradable scaffolds mimicking trabecular bone architecture.
- Scaffolds were seeded with bone marrow cells and assessed for tissue ingrowth in vitro.
- Preseeded scaffolds were implanted into non-healing rabbit segmental bone defects to evaluate in vivo bone formation and union.
Main Results:
- New bone tissue formation was observed throughout the scaffold volume, mirroring the scaffold's geometry, to a depth of 10 mm.
- Implanted scaffolds facilitated new functional bone formation and achieved bony union in rabbit bone defects within 8 weeks.
- This study represents the first successful 3D bone tissue engineering repair using autologous marrow cells without supplementary growth factors.
Conclusions:
- The novel scaffold morphology is crucial for successful 3D bone tissue engineering.
- This approach offers a promising, growth factor-free strategy for repairing large bone defects.
- The technique holds potential for advancing orthopedic regenerative medicine applications.
