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Updated: Jun 26, 2026
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Printing Thermoresponsive Reverse Molds for the Creation of Patterned Two-component Hydrogels for 3D Cell Culture
Published on: July 10, 2013
High-precision freeform DLP bioprinting by thermo-reversible gelation
Daobo Han1, Mingshan Zhang1, Junfang Xie1
1Key Laboratory of Weak-Light Nonlinear Photonics, Ministry of Education, School of Physics and TEDA Applied Physics, Nankai University, Tianjin, 300071, China.
Biomaterials
|June 24, 2026
Summary
This study introduces a novel 3D bioprinting technique using reversible gelation suspension stereolithography. This method enhances precision and geometric freedom for advanced tissue engineering applications.
Area of Science:
- Biotechnology
- Materials Science
- Tissue Engineering
Background:
- Light-based 3D bioprinting faces limitations in precision (radical diffusion, light scattering) and geometric freedom.
- Existing techniques struggle to create complex, suspended hydrogel structures for tissue regeneration.
Purpose of the Study:
- To develop an advanced 3D bioprinting method overcoming precision and geometric limitations.
- To demonstrate a novel technique for fabricating complex, cell-laden tissue constructs.
Main Methods:
- Developed reversible gelation suspension stereolithography combining DLP printing with temperature-controlled reversible gelation.
- Pre-gelling bioink before photocuring to minimize diffusion and scattering.
- Utilized in situ support for printing unrestricted geometries and multi-material constructs.
Main Results:
- Achieved high precision of 6.8 μm, significantly reducing diffusion and scattering effects.
- Successfully printed various structures with unrestricted geometries, including multi-material constructs.
- Fabricated cell-loaded hexagonal hepatic lobule and multi-scale branched vessels with high cell survival rates and functional performance.
Conclusions:
- The reversible gelation suspension stereolithography technique overcomes key limitations of light-based 3D bioprinting.
- Demonstrated superior biocompatibility and functional potential for diverse tissue engineering applications.
- Opens new possibilities for creating complex, patient-specific tissue constructs.
