A micro-scale surface-structured PCL scaffold fabricated by a 3D plotter and a chemical blowing agent

Area of Science:

• Biomaterials Engineering
• Tissue Engineering
• Surface Science

Background:

• Polymeric scaffolds are crucial for studying cell responses in tissue engineering.
• Rapid prototyping creates scaffolds with smooth surfaces, hindering initial cell attachment.
• Cellular behavior is highly sensitive to the scaffold's surface properties.

Purpose of the Study:

• To engineer a surface-modified 3D polymeric scaffold with enhanced cell attachment capabilities.
• To investigate the impact of nano- and micro-pores on scaffold properties and cell interaction.
• To improve upon limitations of traditional rapid-prototyping scaffold fabrication.

Main Methods:

• Utilized a 3D plotting method combined with a chemical blowing agent.
• Fabricated surface-modified 3D polymeric scaffolds with controlled nano- and micro-porosity.
• Evaluated scaffold properties (compressive modulus, hydrophilicity) and cell adhesion (chondrocytes).

Main Results:

• The chemically-blown 3D scaffolds exhibited improved compressive modulus and hydrophilicity.
• Surface-modified scaffolds demonstrated significantly enhanced initial cell adhesion.
• Chondrocytes showed better interaction with the surface-modified scaffolds compared to normal scaffolds.

Conclusions:

• Surface modification via chemical blowing creates effective nano- and micro-pores on 3D polymeric scaffolds.
• This approach enhances critical properties like hydrophilicity and compressive modulus.
• The improved scaffold design promotes better cellular interaction, particularly for chondrocytes, advancing tissue engineering applications.