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Embedded 3D Printing of Cryogel-Based Scaffolds
Çiğdem Bilici1, Mine Altunbek2, Ferdows Afghah2
1Nanotechnology Research and Application Center, Sabanci University, Tuzla, Istanbul 34956, Turkiye.
ACS Biomaterials Science & Engineering
|July 18, 2023
Summary
This study introduces a novel embedded 3D printing method for creating complex, precise cryogel scaffolds using gelatin methacryloyl (GelMA) bioinks. This technique enables advanced tissue engineering applications by producing cytocompatible scaffolds with excellent shape recovery and cell proliferation.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- 3D Printing Technologies
Background:
- Cryogel scaffolds are crucial for tissue engineering due to their porous structure.
- Fabricating complex 3D cryogel scaffolds is challenging due to cryogenic synthesis conditions.
Purpose of the Study:
- To develop a novel embedded 3D printing technique for fabricating precise and complex cryogel-based scaffolds.
- To utilize a photo-cross-linkable gelatin methacryloyl (GelMA)-based bioink for scaffold fabrication.
Main Methods:
- An embedded printing technique using a photo-cross-linkable GelMA ink within a nanoclay support bath was employed.
- Alginate pre-cross-linking with Ca2+ stabilized structures during printing.
- Cryogelation and GelMA cross-linking were achieved at subzero temperatures under UV light.
Main Results:
- Successfully fabricated complex 3D cryogel scaffolds with integrated alginate hydrogels.
- Scaffolds demonstrated excellent shape recovery (up to 80% strain) and cytocompatibility.
- Human fibroblast cells showed good attachment, spread morphology, and high proliferation rates on the scaffolds.
Conclusions:
- The embedded 3D printing technique is effective for creating cytocompatible cryogel scaffolds with controlled morphology and mechanical properties.
- This method allows for tunable cryogel properties by adjusting GelMA concentration, enabling customized scaffold fabrication for tissue engineering.
