Bone Regeneration and Substitute Materials

Bone loss owing to trauma, disease or ageing presents a significant clinical challenge worldwide. Natural bone repair relies on a coordinated interplay between osteoconduction, osteoinduction and osteogenesis, but large defects often exceed intrinsic healing capacity. Synthetic and biological substitute materials aim to bridge this gap by providing a scaffold that supports cell attachment, promotes vascularisation and gradually resorbs to be replaced by new bone. Key design parameters include the composition of the substitute—often variants of calcium phosphates such as hydroxyapatite, β-tricalcium phosphate or carbonate apatite—their porosity, pore geometry and surface chemistry. Recent advances have focused on mimicking native bone mineral phases, controlling nanostructure to modulate osteoclast and osteoblast activity, and integrating antimicrobial or bioactive ions to enhance safety and efficacy. Innovations in scaffold fabrication, including honeycomb architectures and dissolution–precipitation protocols, have realised materials with tailored mechanical strength, resorption rates and biological responsiveness. Together these developments promise improved outcomes in orthopaedics, maxillofacial reconstruction and dental implantology, while advancing our fundamental understanding of bone regeneration processes.

Research from Nature Portfolio

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Bone Regeneration and Substitute Materials publication trend

The graph below shows the total number of articles in bone regeneration and substitute materials across all publications each year (not limited to Nature Index journals).

Technical terms

Osteoconductivity: The ability of a scaffold to support the attachment, proliferation and migration of bone-forming cells.

Osteoinduction: The process by which a material stimulates progenitor cells to differentiate into osteoblasts.

Carbonate apatite: A form of calcium phosphate closely matching natural bone mineral, containing carbonate ions within the apatite lattice.

Honeycomb architecture: A scaffold design featuring regularly arrayed, unidirectional pores that enhance mechanical strength and tissue penetration.

References

1. Silver phosphate-modified carbonate apatite honeycomb scaffolds for anti-infective and pigmentation-free bone tissue engineering. Materials Today Bio (2024).
2. Biological Properties and Medical Applications of Carbonate Apatite: A Systematic Review. Pharmaceutics (2024).
3. Effects of bone substitute architecture and surface properties on cell response, angiogenesis, and structure of new bone. Journal of Materials Chemistry B (2017).
4. Bone Substitute Fabrication Based on Dissolution-Precipitation Reactions. Materials (2010).
5. Effects of nanopores on the mechanical strength, osteoclastogenesis, and osteogenesis in honeycomb scaffolds. Journal of Materials Chemistry B (2020).
6. Honeycomb blocks composed of carbonate apatite, β-tricalcium phosphate, and hydroxyapatite for bone regeneration: effects of composition on biological responses. Materials Today Bio (2019).