Micro-structured polymer scaffolds fabricated by direct laser writing for tissue engineering

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Laser Fabrication

Background:

• Developing advanced materials and fabrication techniques is crucial for creating functional tissue engineering scaffolds.
• Current methods face limitations in achieving high resolution and biocompatibility simultaneously.

Purpose of the Study:

• To investigate direct laser writing of polymeric materials for creating 3D scaffolds for tissue engineering.
• To evaluate the biocompatibility of fabricated scaffolds using in vitro and in vivo models.

Main Methods:

• Utilized a femtosecond Yb:KGW laser for non-linear lithography via multi-photon polymerization.
• Fabricated porous 3D scaffolds from hybrid organic-inorganic sol-gel and ORMOCER® photoresins.
• Assessed scaffold biocompatibility using rabbit muscle-derived stem cells and laboratory rats.

Main Results:

• Achieved submicron resolution structuring of polymeric materials.
• Fabricated millimeter-sized 3D scaffolds with internal pores ranging from 10 to 100 μm.
• Demonstrated promising biocompatibility of the fabricated scaffolds in both in vitro and in vivo tests.

Conclusions:

• Direct laser writing is a viable technique for fabricating high-resolution polymeric scaffolds for tissue engineering.
• The investigated materials and fabrication method are suitable for developing advanced tissue engineering solutions.
• This interdisciplinary approach offers a promising pathway for regenerative medicine applications.