Gallium-Containing Bioactive Materials for Bone Applications
Summary
Gallium-containing bioactive materials have emerged as a multifunctional class of implants and scaffolds designed to support bone repair while combating infection and excessive resorption. By incorporating gallium ions into ceramics, glasses or polymer composites, researchers can harness gallium’s unique ability to inhibit osteoclast activity, disrupt bacterial iron metabolism and stimulate osteoblastic differentiation. Key strategies include substituting gallium for calcium in hydroxyapatite lattices, embedding gallium oxide nanodots on implant surfaces and creating composite granules that release gallium in a controlled manner. These approaches seek to balance therapeutic efficacy with biocompatibility by tailoring ion-release profiles and material microstructure. Advances in synthesis methods—ranging from wet-chemical precipitation to block-copolymer-templated surface patterning—have enabled precise control over gallium content, particle morphology and porosity. The global significance lies in offering antibiotic-free antimicrobial action and enhanced bone integration, addressing rising antibiotic resistance and the need for improved outcomes in orthopaedic and dental interventions.
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Gallium-Containing Bioactive Materials for Bone Applications publication trend
The graph below shows the total number of articles in gallium-containing bioactive materials for bone applications across all publications each year (not limited to Nature Index journals).
Technical terms
Bioactive material: A material that interacts with living tissue to elicit specific biological responses, such as bone bonding or tissue regeneration.
Hydroxyapatite: A calcium phosphate ceramic chemically similar to the mineral component of bone, widely used as a bone graft substitute.
Osteointegration: The process by which a biomaterial becomes firmly anchored to bone through the formation of new bone tissue at the interface.
Osteoclast: A specialised cell responsible for bone resorption, breaking down bone mineral and matrix.
Mesenchymal stem cell: A multipotent progenitor cell capable of differentiating into osteoblasts, chondrocytes or adipocytes.
Doping: The intentional incorporation of trace elements into a material’s structure to modify its physical, chemical or biological properties.
References
- Nano sized gallium oxide surface features for enhanced antimicrobial and osteo-integrative responses. Colloids and Surfaces B Biointerfaces (2023).
- Gallium-Doped Hydroxyapatite: Shape Transformation and Osteogenesis Activity. Molecules (2023).
- Gallium containing bioactive materials: A review of anticancer, antibacterial, and osteogenic properties. Bioactive Materials (2022).
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