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Water-based polyurethane 3D printed scaffolds with controlled release function for customized cartilage tissue

Kun-Che Hung1, Ching-Shiow Tseng2, Lien-Guo Dai3

  • 1Institute of Polymer Science and Engineering, National Taiwan University, Taipei, Taiwan, ROC.

Biomaterials
|January 18, 2016
PubMed
Summary
This summary is machine-generated.

This study introduces novel 3D printing scaffolds using water-based materials for cartilage tissue engineering. These scaffolds enable controlled release of bioactive factors, promoting cartilage repair and potentially preventing hypertrophy.

Keywords:
3D printingCartilage regenerationCustomized tissue engineeringMSCScaffold

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Regenerative Medicine

Background:

  • Conventional 3D printing methods struggle to incorporate bioactive ingredients due to harsh processing conditions (heat, solvents, crosslinkers) that degrade bioactivity.
  • Developing advanced 3D printing materials is crucial for creating functional scaffolds in tissue engineering applications, particularly for cartilage repair.

Purpose of the Study:

  • To develop water-based 3D printing materials with controlled bioactivity for customized cartilage tissue engineering.
  • To investigate the potential of these novel scaffolds in promoting chondrogenesis and cartilage regeneration.

Main Methods:

  • A water-based printing ink was formulated using synthetic biodegradable polyurethane (PU) elastic nanoparticles, hyaluronan, and bioactive ingredients (TGFβ3 or Y27632).
  • Compliant scaffolds were fabricated using low-temperature 3D printing.
  • Mesenchymal stem cells (MSCs) were cultured on the scaffolds, and their self-aggregation, chondrogenic differentiation, and matrix production were assessed.
  • In vivo studies involved rabbit knee implantation to evaluate cartilage regeneration potential.

Main Results:

  • The developed 3D printing ink successfully created compliant scaffolds at low temperatures.
  • The scaffolds facilitated MSC self-aggregation and induced chondrogenic differentiation through timely release of bioactive ingredients.
  • The growth factor-free design showed potential in preventing cartilage hypertrophy.
  • Rabbit knee implantation demonstrated the efficacy of the scaffolds in cartilage regeneration.

Conclusions:

  • Novel water-based 3D printing composite scaffolds with controlled bioactivity were successfully developed for customized cartilage tissue engineering.
  • These scaffolds effectively promote MSC chondrogenic differentiation and cartilage matrix production, offering a promising approach for cartilage repair.
  • The controlled release mechanism and potential to avoid hypertrophy highlight the therapeutic potential in regenerative medicine.