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Updated: Jul 25, 2025
Author Spotlight: Enhancing Bone Regeneration with Vascularized Artificial Cartilage Integration
Published on: July 14, 2023
Injectable antibacterial Ag-HA/ GelMA hydrogel for bone tissue engineering.
Jiapu Wang1,2, Xuefeng Wang1, Ziwei Liang1,2
1Department of Biomedical Engineering, Research Center for Nano-Biomaterials and Regenerative Medicine, College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, China.
This study developed an injectable hydrogel incorporating hydroxyapatite (HA) and silver (Ag) for bone repair. The material shows excellent mechanical properties, biocompatibility, and antibacterial activity, offering a promising minimally invasive bone regeneration strategy.
Area of Science:
- Biomaterials Science
- Orthopedic Engineering
- Tissue Engineering
Background:
- Bone defects from trauma/disease pose significant health challenges.
- Current implants require removal surgery, risking infection and prolonged recovery.
- Hydrogels offer bionic, injectable scaffolds for bone tissue engineering.
Purpose of the Study:
- To develop a multifunctional injectable hydrogel for bone repair.
- To mimic natural bone's organic-inorganic structure.
- To achieve bone regeneration with antibacterial properties for minimally invasive therapy.
Main Methods:
- Photocrosslinked Gelatin Methacryloyl (GelMA) hydrogel.
- Incorporation of hydroxyapatite (HA) microspheres.
- Introduction of silver (Ag) for antibacterial properties.
Main Results:
- HA/GelMA hydrogels showed enhanced adhesion, bending resistance, stability, and mechanical properties.
- Ag-HA/GelMA hydrogels exhibited significant antibacterial activity against *Staphylococcus aureus* and *Escherichia coli*.
- Cell experiments confirmed cytocompatibility and low toxicity of Ag-HA/GelMA to MC3T3 cells.
Conclusions:
- The developed photothermal injectable antibacterial hydrogel is a promising biomaterial for bone repair.
- This material offers a potential minimally invasive clinical strategy for bone regeneration.
- The study highlights a novel approach for creating advanced bone tissue engineering scaffolds.
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