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Patient-Specific Bone Particles Bioprinting for Bone Tissue Engineering.

Greeshma Ratheesh1, Cedryck Vaquette2, Yin Xiao1,3

  • 1Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, 4000, Australia.

Advanced Healthcare Materials
|November 9, 2020
PubMed
Summary
This summary is machine-generated.

This study introduces a novel bioink using methacrylated gelatin (GelMA) and bone particles (BPs) for enhanced bone regeneration. The developed bioink supports cell viability and osteogenic marker expression in bioprinted constructs.

Keywords:
GelMAbioinksbioprintingbone particles

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Regenerative Medicine

Background:

  • Current bioinks often lack biofunctionality despite good printability and cell viability.
  • Bone regeneration strategies require advanced biomaterials that support cellular activity and tissue formation.

Purpose of the Study:

  • To develop and characterize a biofunctionalized methacrylated gelatin (GelMA)-based bioink incorporating bone particles (BPs) for bone regeneration.
  • To evaluate the printability, rheological properties, and cell behavior within the bioprinted constructs.

Main Methods:

  • Incorporation of BPs (0-500 µm) into GelMA hydrogels at varying concentrations (5-15% w/v).
  • Systematic investigation of bioink printability, rheological properties (shear thinning, gel strength), and scaffold metabolic activity.
  • Assessment of cell migration, colonization, and osteogenic marker expression within the bioprinted scaffolds.

Main Results:

  • Optimal printability and high gel strength were achieved with 10-12.5% GelMA and 15% w/v BP loading (0-500 µm).
  • Bioink properties and scaffold metabolic activity were influenced by GelMA concentration and BP size.
  • Cells within BPs migrated, colonized the scaffold, and expressed osteogenic markers, indicating retained cellular function.

Conclusions:

  • A GelMA-based bioink functionalized with viable BPs demonstrates feasibility for bioprinting bone constructs.
  • The developed bioink shows potential for personalized bone regeneration therapies with possible chairside clinical translation.