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Fabrication of Size-Controlled and Emulsion-Free Chitosan-Genipin Microgels for Tissue Engineering Applications

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Chitosan/bioactive glass nanoparticles composites for biomedical applications.

Gisela M Luz¹, João F Mano

¹3B's Research Group-Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, 4806-909 Taipas, Guimarães, Portugal.

Biomedical Materials (Bristol, England)

|September 14, 2012

Summary

Chitosan-based nanocomposite films incorporating bioactive glass nanoparticles show promise for bone tissue regeneration. These advanced biomaterials enhance cellular response, indicating potential for orthopedic and maxillo-facial applications.

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Area of Science:

Biomaterials Science
Regenerative Medicine
Nanotechnology

Background:

Guided tissue regeneration requires advanced biomaterials.
Chitosan and bioactive glass nanoparticles (BG-NPs) are promising components for tissue engineering scaffolds.

Purpose of the Study:

To develop and evaluate chitosan/BG-NPs nanocomposite films for guided tissue regeneration.
To investigate the effect of different BG-NP formulations on material properties and biological response.

Main Methods:

Fabrication of nanocomposite films with varying BG-NP compositions (SiO2:CaO:P2O5 and SiO2:CaO:P2O5:MgO).
Characterization of zeta potential and hydrophilicity.
In vitro assessment of bioactivity using simulated body fluid (SBF) immersion, SEM, and EDX.
Evaluation of cell behavior (SaOs-2 osteoblastic-like cells) including SEM, cytotoxicity, DNA quantification, and alkaline phosphatase activity.

Main Results:

The BG-NPs formulation containing magnesium exhibited lower zeta potential and resulted in more hydrophilic composite films.
In vitro bioactivity was confirmed through SBF immersion.
Chitosan nanocomposites demonstrated enhanced biological response, including positive cellular behavior and proliferation.

Conclusions:

The developed chitosan/BG-NPs nanocomposite films possess favorable properties for bone regeneration.
These materials show significant potential for applications in orthopedic and maxillo-facial reconstructive surgery.