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Three-dimensional printed polycaprolactone-microcrystalline cellulose scaffolds.

Maria Elena Alemán-Domínguez1, Elena Giusto2, Zaida Ortega1

  • 1Departamento de Ingeniería de Procesos, Universidad de Las Palmas de Gran Canaria, Edificio de Fabricación Integrada, Parque científico-tecnológico de la ULPGC, Las Palmas, Spain.

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Summary

Microcrystalline cellulose (MCC) additive in polycaprolactone (PCL) scaffolds enhances mechanical and cell proliferation properties for bone tissue engineering. The optimal ratio PCL:MCC 98:2 shows significant improvements, making it promising for further research.

Keywords:
biocompatibility/hard tissuebone marrowbone remodelingporoustissue engineering

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Materials Science

Background:

  • Polycaprolactone (PCL) is a promising biodegradable polymer for bone tissue engineering scaffolds.
  • Enhancing the mechanical and biological properties of PCL scaffolds is crucial for their clinical application.
  • Microcrystalline cellulose (MCC) is explored as a potential additive to improve PCL properties.

Purpose of the Study:

  • To investigate the effect of incorporating microcrystalline cellulose (MCC) into polycaprolactone (PCL) matrices.
  • To evaluate the mechanical, thermal, and biological properties of 3D printed PCL:MCC composite scaffolds.
  • To determine the optimal PCL:MCC ratio for bone tissue engineering applications.

Main Methods:

  • Composite scaffolds were fabricated using fused deposition modeling (FDM) 3D printing.
  • MCC was incorporated into PCL at concentrations of 0, 2, 5, and 10% (w/w).
  • Thermogravimetric analysis (TGA), mechanical testing (compression and flexural), and cell proliferation assays (sheep bone marrow cells) were performed.

Main Results:

  • Scaffolds with 2% and 5% MCC exhibited enhanced flexural and compression elastic modulus compared to pure PCL.
  • Scaffolds containing 10% MCC did not show a reinforcement effect.
  • Cell proliferation assays demonstrated significantly better cell growth (p < 0.05) on scaffolds with 2% MCC over 8 days.

Conclusions:

  • The addition of 2% MCC to PCL significantly improves the mechanical properties and cellular response of 3D printed scaffolds.
  • The PCL:MCC 98:2 composite scaffolds show excellent potential for bone tissue engineering applications.
  • Further evaluation of these optimized scaffolds is warranted for future development in regenerative medicine.