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Updated: Oct 13, 2025

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Multifunctional 3D-Printed Magnetic Polycaprolactone/Hydroxyapatite Scaffolds for Bone Tissue Engineering.

Mauro Petretta1,2, Alessandro Gambardella3, Giovanna Desando2

  • 1REGENHU Ltd., Z.I. Le Vivier 22, 1690 Villaz-St-Pierre, Switzerland.

Polymers
|November 13, 2021
PubMed
Summary

This study developed novel polycaprolactone (PCL)-based scaffolds with hydroxyapatite (HAp) and superparamagnetic iron oxide nanoparticles (SPION) for bone tissue engineering. The PCL-HAp-1% SPION scaffolds demonstrated excellent cell compatibility and osteogenic potential, paving the way for advanced bone regeneration therapies.

Keywords:
3D additive manufacturingnanocompositespolycaprolactone/hydroxyapatite scaffoldssuperparamagnetic nanoparticlestissue engineering

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Nanotechnology

Background:

  • Developing advanced 3D scaffolds is crucial for bone tissue engineering to achieve high healing efficiency.
  • Polycaprolactone (PCL)-based scaffolds offer a promising base, but require functionalization for enhanced cellular interaction and guided regeneration.

Purpose of the Study:

  • To engineer multifunctional and resistant 3D scaffolds using PCL, hydroxyapatite (HAp), and superparamagnetic iron oxide nanoparticles (SPION).
  • To evaluate the efficacy of magnetically assisted cell seeding and the osteogenic potential of these novel scaffolds for bone regeneration.

Main Methods:

  • Fabrication of PCL-HAp-SPION scaffolds with varying SPION concentrations using 3D-printing technology.
  • Characterization of scaffold topography and material distribution using Atomic Force and Magnetic Force Microscopy (AFM-MFM).
  • Assessment of cell (Mesenchymal Stromal Cells - MSCs) adhesion, proliferation, and osteogenic differentiation on the scaffolds, with magnetic assistance.

Main Results:

  • AFM-MFM confirmed homogenous distribution of HAp and SPION on the scaffold surfaces.
  • Magnetically assisted cell seeding was most efficient at 1% SPION concentration, yielding good cell entrapment and adhesion.
  • MSCs cultured on PCL-HAp-1% SPION scaffolds exhibited good proliferation and intrinsic osteogenic potential without signs of toxicity.

Conclusions:

  • The developed PCL-HAp-1% SPION scaffolds possess inherent osteogenic potential and demonstrate excellent biocompatibility.
  • The magnetic guidance of cells enhances seeding efficiency, supporting their suitability for bone tissue engineering applications.
  • These findings support further in vitro and in vivo studies for validating these advanced scaffolds in bone regeneration.