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Toward Smart Biomimetic Apatite-Based Bone Scaffolds with Spatially Controlled Ion Substitutions
Edoardo Cianflone1,2, Fabien Brouillet2, David Grossin1
1CIRIMAT, Université de Toulouse, CNRS, INP-ENSIACET, 31030 Toulouse, France.
Nanomaterials (Basel, Switzerland)
|February 11, 2023
Summary
Novel core-shell particles combine antibacterial silver ions and bone-regenerating copper ions. These "smart" particles, embedded in scaffolds, offer sequential release for enhanced bone tissue engineering and infection prevention.
Area of Science:
- Biomaterials Science
- Nanotechnology
- Biomedical Engineering
Background:
- Biomimetic apatites are reactive and allow ion substitutions to tailor in vivo responses.
- Sequential release of bioactive ions is crucial for addressing post-implantation events like infection and tissue regeneration.
Purpose of the Study:
- To develop novel micron-sized core-shell particles with spatially controlled bioactive ion release.
- To create multifunctional scaffolds for bone engineering with sequential antibacterial and regenerative properties.
Main Methods:
- Designed core-shell particles with an outer shell of silver ions (Ag+) and an inner core of copper ions (Cu2+).
- Embedded these particles in a polymeric matrix using freeze-casting to create 3D porous scaffolds.
- Evaluated cytocompatibility and antibacterial properties in vitro.
Main Results:
- Confirmed cytocompatibility of silver and copper co-substituted apatites.
- Demonstrated effective antibacterial properties conferred by silver ions.
- Successfully fabricated 3D porous scaffolds for bone engineering.
Conclusions:
- The developed core-shell particles offer a promising platform for sequential ion release in bone regeneration.
- This approach enables the creation of "smart" scaffolds with tailored properties for enhanced bone healing and infection control.
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