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Ceramic Omnidirectional Bioprinting in Cell-Laden Suspensions for the Generation of Bone Analogs
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Hierarchical mesoporous bioactive glass/alginate composite scaffolds fabricated by three-dimensional plotting for
Yongxiang Luo1, Chengtie Wu, Anja Lode
1Centre for Translational Bone, Joint and Soft Tissue Research, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, Fetscherstrasse 74, Dresden, Germany.
Biofabrication
|December 12, 2012
Summary
Researchers created advanced 3D-printed scaffolds using mesoporous bioactive glass (MBG) and alginate. These hierarchical scaffolds offer improved bone regeneration and drug delivery capabilities.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Drug Delivery Systems
Background:
- Developing bioactive scaffolds with controlled architecture for bone tissue engineering and drug delivery remains a significant challenge.
- Hierarchical scaffolds integrating multiple pore sizes are crucial for mimicking native bone structure and function.
Purpose of the Study:
- To fabricate and characterize novel 3D-plotted composite scaffolds using mesoporous bioactive glass (MBG) and alginate.
- To evaluate the impact of MBG incorporation on the physicochemical, biological, and drug delivery properties of alginate scaffolds for bone regeneration.
Main Methods:
- Fabrication of hierarchical scaffolds via 3D plotting of MBG/alginate pastes.
- Characterization of scaffold microstructure, composition, mechanical strength, and apatite mineralization using electron microscopy and spectrometry.
- Assessment of cell attachment, proliferation, and alkaline phosphatase activity of human bone marrow-derived mesenchymal stem cells.
- Evaluation of sustained drug release profiles using dexamethasone as a model drug.
Main Results:
- The MBG/alginate pastes exhibited excellent processability for 3D plotting, yielding stable scaffolds with controllable macropores.
- Incorporation of MBG significantly enhanced mechanical properties, apatite mineralization, and cytocompatibility of the alginate scaffolds.
- Scaffolds demonstrated sustained release of dexamethasone, with release kinetics influenced by MBG content.
- The composite scaffolds possessed well-ordered nano-channels, micropores, and controllable macropores.
Conclusions:
- 3D-plotted MBG-incorporated alginate scaffolds represent a promising platform for bone tissue engineering.
- These scaffolds offer tunable properties for enhanced bone regeneration and controlled drug delivery.
- The combination of MBG and alginate provides a versatile material for developing advanced biomedical devices.
