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Engineered 3D-Printable Nanohydroxyapatite Biocomposites with Cold Plasma-Tailored Surface Features to Boost

Rosalind Sin Man Chan1, Sang Jin Lee1, Fang Wang2

  • 1Division of Applied Oral Sciences and Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR 999077, China.

ACS Applied Materials & Interfaces
|April 14, 2025
PubMed
Summary

Researchers developed advanced nanohydroxyapatite (nHAP) biocomposites for bone regeneration. These versatile materials offer enhanced mechanical strength, improved surface properties, and 3D printability for next-generation medical implants.

Keywords:
3D printingbone reconstructioncold plasmaimplantnanohydroxyapatiteorthopedicresin composite

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Polymer Science

Background:

  • Medical implants require advanced biomaterials for enhanced clinical performance.
  • Synthetic bone graft substitutes, particularly polymer-based options, are under development.
  • Limitations exist in traditional implants, driving innovation in material design.

Purpose of the Study:

  • To develop versatile nanohydroxyapatite (nHAP) biocomposites for bone substitutes.
  • To create materials compatible with resin composite systems and 3D printing.
  • To overcome limitations associated with conventional medical implants.

Main Methods:

  • Incorporation of nHAP and strontium-doped SiO2 glass particles into a photocurable methacrylate monomer system.
  • Application of cold atmospheric plasma irradiation for surface modification.
  • Evaluation of mechanical strength, surface hydrophilicity, in vitro osteogenic activity, and in vivo bone integration.

Main Results:

  • The developed biocomposite exhibits strong mechanical properties.
  • Cold plasma treatment enhanced surface hydrophilicity and exposed nanofillers.
  • Demonstrated in vitro osteogenic activity and in vivo bone integration.
  • Successful 3D printing of a gyroid lattice structure confirmed printability.

Conclusions:

  • The nHAP-biocomposite shows promising biomechanical and biological properties.
  • This material has potential for revolutionizing dental, maxillofacial, and orthopedic implant applications.
  • The study highlights the versatility and efficacy of the developed biomaterial for bone reconstruction.