Bioactive Material Applications in Bone Tissue Engineering

Bioactive material applications in bone tissue engineering aim to restore structural and functional integrity of damaged skeletal tissue by employing materials that actively engage with the biological environment. Central to this approach are bioceramics such as hydroxyapatite and tricalcium phosphate, bioactive glasses and composite platforms that mimic the mineral phase of bone, offering osteoconductive frameworks and, in some cases, intrinsic osteoinductive properties. Advanced fabrication methods—ranging from 3D printing and sol–gel processing to natural polymer templating—enable precise control of porosity, surface chemistry and mechanical performance. Incorporation of therapeutic ions or growth factors can modulate cellular proliferation, osteoblast differentiation and angiogenesis, while antibacterial dopants address infection risks. Such bioactive constructs are designed to degrade in synchrony with new tissue formation, reducing the need for secondary surgeries. Collectively, these strategies are driving a paradigm shift in the treatment of large bone defects and non-union fractures, with significant translational potential for clinical orthopaedics, craniofacial reconstruction and dental implants.

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Research from all publishers

Recent investigations have demonstrated enhanced performance of calcium phosphate scaffolds through compositional and structural optimisation. A 3D-printed hydroxyapatite-whisker scaffold coated with biphasic calcium phosphate achieved highly interconnected porosity and superior mechanical strength, while heat treatment induced conversion to calcium-deficient phases that bolster bioactivity and osteoinductivity. Innovations in antibacterial functionality have been realised via silver-doped hydroxyapatite, which exhibits potent inhibition of multidrug-resistant bacteria in orthopaedic contexts by integrating Ag⁺ ions into the hydroxyapatite lattice without compromising cytocompatibility. Further, comprehensive reviews of calcium phosphate-based biomaterials have elucidated the relationship between ion release profiles, scaffold morphology and osteogenic response, highlighting nanostructured phases and hierarchical architectures for drug or gene delivery and sustained osteoinduction in the repair of complex bone defects.

Bioactive Material Applications in Bone Tissue Engineering publication trend

The graph below shows the total number of articles in bioactive material applications in bone tissue engineering across all publications each year (not limited to Nature Index journals).

Technical terms

Bioactive material: A substance that interacts with biological tissues to stimulate specific cellular responses and promote integration. Osteoconductivity: The ability of a material to support the attachment and growth of new bone along its surface. Osteoinductivity: The capacity of a material to induce differentiation of progenitor cells into osteoblasts, initiating bone formation. Scaffold: A three-dimensional structure designed to provide mechanical support and guide tissue regeneration. Calcium phosphate: A family of bioceramics, including hydroxyapatite and tricalcium phosphate, with chemical similarity to bone mineral and tunable resorption rates.

References

1. Preparation and characterization of 3D printed hydroxyapatite-whisker-strengthened hydroxyapatite scaffold coated with biphasic calcium phosphate. Chinese Journal of Mechanical Engineering Additive Manufacturing Frontiers (2023).
2. Antibacterial activity of silver doped hydroxyapatite toward multidrug-resistant clinical isolates of Acinetobacter baumannii. Journal of Hazardous Materials (2023).
3. Sol–gel based materials for biomedical applications. Progress in Materials Science (2016).
4. Bioceramic hydroxyapatite-based scaffold with a porous structure using honeycomb as a natural polymeric Porogen for bone tissue engineering. Biomaterials Research (2021).