Graphene-Based Scaffolds for Bone Tissue Engineering

Graphene-based scaffolds harness the exceptional mechanical strength, large specific surface area and rich surface chemistry of graphene and its derivatives to emulate the hierarchical structure of bone extracellular matrix (ECM). By integrating graphene oxide or reduced graphene oxide into polymers, ceramics and hydrogels, researchers have engineered three-dimensional frameworks that provide robust mechanical support while facilitating cell adhesion, proliferation and differentiation. These composites leverage the electrical conductivity and osteoinductive potential of graphene to enhance signalling pathways crucial for osteogenesis and angiogenesis. Advanced fabrication techniques—including electrospinning, freeze-drying, self-assembly and three-dimensional printing—enable precise control over pore size, interconnectivity and nanoscale features, tailoring scaffolds for mandibular, periodontal and critical-size defect repair. Practical applications span from dental regeneration to load-bearing implant coatings, addressing the global demand for effective and scalable solutions in bone reconstruction.

Research from Nature Portfolio

Recent studies have demonstrated the use of graphene oxide to reinforce interfacial bonding and bioactivity in composite scaffolds. In one approach, graphene oxide was introduced as an interface phase between a polyetheretherketone matrix and hydroxyapatite particles, leading to a marked increase in compressive strength and modulus alongside the spontaneous formation of bone-like apatite. This scaffold supported osteoblast adhesion, proliferation and in vivo bone formation without exogenous growth factors. In a complementary development, three-dimensional chitosan scaffolds enriched with graphene oxide exhibited synergistic enhancement of alkaline phosphatase activity, upregulation of key osteogenic markers such as Runx2 and osteopontin, and successful regeneration of critical-size calvarial defects in a murine model.

Research from all publishers

A burgeoning area of innovation employs graphene oxide quantum dots within hydrogel-encapsulated cell constructs. Zero-dimensional graphene oxide quantum dots incorporated into gelatin methacryloyl (GelMA) hydrogels were shown to regulate mitochondrial dynamics in human periodontal ligament stem cells, promoting fusion over fission, enhancing osteogenic differentiation and effecting mandibular bone defect repair in vivo. Parallel efforts in hydrogel-integrated graphene superstructures have produced conductive, mechanically resilient three-dimensional networks that mimic ECM hydration and tethering cues. These constructs support the adhesion, proliferation and lineage commitment of MC3T3-E1 pre-osteoblasts and other cell types via improved protein adsorption and electrical stimulation. Furthermore, the assembly of a 3D-printed polycaprolactone framework with multilayer mineralised graphene oxide–collagen–hydroxyapatite microscaffolds has enabled hierarchical macro-micro-nano architecture, yielding favourable cell infiltration, osteogenic differentiation in vitro and effective mandibular bone regeneration in vivo.

Graphene-Based Scaffolds for Bone Tissue Engineering publication trend

The graph below shows the total number of articles in graphene-based scaffolds for bone tissue engineering across all publications each year (not limited to Nature Index journals).

Technical terms

Graphene oxide (GO): Oxidised derivative of graphene bearing oxygen-containing functional groups, enhancing hydrophilicity and facilitating chemical conjugation.

Hydrogel: Three-dimensional network of hydrophilic polymers capable of retaining large volumes of water, providing a biomimetic environment for cells.

Extracellular matrix (ECM): Complex assembly of proteins and polysaccharides surrounding cells, offering structural support and biochemical signals.

Osteogenic differentiation: Process by which progenitor cells acquire the phenotype and function of osteoblasts, leading to new bone formation.

Hydroxyapatite (HAp): Calcium phosphate mineral resembling bone mineral, widely used for its osteoconductivity and bioactivity in scaffolds.

Chitosan: Biopolymer derived from chitin, known for biocompatibility, biodegradability and ease of scaffold fabrication.

References

1. Graphene oxide as an interface phase between polyetheretherketone and hydroxyapatite for tissue engineering scaffolds. Scientific Reports (2017).
2. Chitosan-Graphene Oxide 3D scaffolds as Promising Tools for Bone Regeneration in Critical-Size Mouse Calvarial Defects. Scientific Reports (2017).
3. Human periodontal ligament stem cell sheets activated by graphene oxide quantum dots repair periodontal bone defects by promoting mitochondrial dynamics dependent osteogenic differentiation. Journal of Nanobiotechnology (2024).
4. Hydrogel-integrated graphene superstructures for tissue engineering: From periodontal to neural regeneration. Carbon (2024).
5. 3D-printed PCL framework assembling ECM-inspired multi-layer mineralized GO-Col-HAp microscaffold for in situ mandibular bone regeneration. Journal of Translational Medicine (2024).