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Biomechanically Tunable Nano-Silica/P-HEMA Structural Hydrogels for Bone Scaffolding
Raffaella Aversa1, Relly Victoria Petrescu2, Florian Ion T Petrescu2
1Advanced Materials Lab, Department of Architecture and Industrial Design, Second University of Naples, Abazia di San Lorenzo, 81031 Aversa, Italy.
Bioengineering (Basel, Switzerland)
|April 30, 2021
Summary
Biomimetic hydrogels with 5% nanosilica loading exhibit mechanical properties similar to bone and cartilage. These tunable scaffolds show potential for bone tissue engineering applications.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Tissue Engineering
Background:
- Hydrophilic polymer-based hydrogels are crucial in tissue engineering.
- Understanding their physical and mechanical properties is essential for biomimetic applications.
Purpose of the Study:
- To investigate the physical and mechanical properties of PHEMA-nanosilica hybrid hydrogels.
- To evaluate their potential as biomimetic scaffolds for bone tissue engineering.
Main Methods:
- Synthesized PHEMA-nanosilica hybrid samples with varying nanosilica content (5-25%).
- Equilibrated samples in isotonic and hypotonic saline solutions at 37°C.
- Characterized mechanical properties, equilibrium absorption, and sorption kinetics.
- Applied Flory-Huggins interaction parameter to analyze sorption behavior.
Main Results:
- The 5% nanosilica hybrid showed mechanical properties comparable to cortical bone (dry) and articular cartilage (hydrated).
- Anomalous sorption modes and swelling rates were observed and related to osmotic pressures and bulk modulus.
- A lower difference between osmotic swelling pressures and bulk modulus correlated with higher swelling rates and uptakes.
Conclusions:
- Tuneable biomimetic scaffold biomaterials can be designed for bone tissue engineering.
- PHEMA-nanosilica hybrid hydrogels offer biocompatible and biomechanically active interfaces.
- These materials hold promise for developing advanced bone regeneration strategies.
