Electrical Stimulation Techniques in Bone Tissue Engineering

Electrical stimulation (ES) has emerged as a powerful adjunct to traditional bone tissue engineering strategies, harnessing the intrinsic piezoelectric and bioelectric properties of bone to accelerate repair and regeneration. By delivering controlled electrical cues—either through direct current, pulsed electromagnetic fields or conductive biomaterials—researchers aim to influence cell behaviour, enhance osteogenic differentiation and improve vascularisation within defect sites. Conductive scaffolds composed of polymers, ceramics or composites act both as structural templates and as electrical conduits, enabling spatiotemporal modulation of electrochemical signals. At the cellular level, ES promotes mesenchymal stem cell proliferation, alignment and expression of osteogenic markers such as Runx2, alkaline phosphatase and osteocalcin. In vivo, coupling ES with engineered constructs has led to increased bone volume, mechanical strength and neovascular growth in critical‐sized defects. These advances underscore the global significance of ES in offering minimally invasive, cost‐effective therapies for non‐union fractures, osteoporosis and large‐bone reconstructions.

Research from Nature Portfolio

A seminal work demonstrated that combining electrical stimulation with cell–scaffold constructs significantly enhances bone repair in a rodent femoral defect model. Mesenchymal stem cells seeded onto biodegradable scaffolds and exposed to low‐intensity ES exhibited accelerated osteogenic differentiation in vitro, characterised by elevated osteocalcin deposition and matrix mineralisation. When applied in vivo over eight weeks, this approach yielded substantial improvements in bone regeneration, including higher bone density, increased vascular network formation and greater biomechanical strength compared to constructs without stimulation.

Electrical Stimulation Techniques in Bone Tissue Engineering publication trend

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

Technical terms

Electrical stimulation (ES): application of controlled electrical fields or currents to cells or tissues to modulate biological activity.

Scaffold: a three‐dimensional porous structure providing mechanical support and guiding cell attachment and tissue formation.

Osteogenesis: the biological process by which new bone is formed through osteoblast differentiation and matrix mineralisation.

Mesenchymal stem cells (MSCs): multipotent progenitor cells capable of differentiating into bone, cartilage and fat lineages.

Conductive materials: substances with intrinsic or induced electrical conductivity used in scaffolds to transmit stimulation to cells.

Electroactive biomaterials: engineered materials designed to mimic or respond to electrical signals, promoting cell recruitment and differentiation.

References

1. Electrical stimulation in bone tissue engineering treatments. European Journal of Trauma and Emergency Surgery (2020).
2. Conductive Scaffolds for Bone Tissue Engineering: Current State and Future Outlook. Journal of Functional Biomaterials (2021).
3. In vitro effect of direct current electrical stimulation on rat mesenchymal stem cells. PeerJ (2017).
4. Combining electrical stimulation and tissue engineering to treat large bone defects in a rat model. Scientific Reports (2018).
5. Electroactive Biomaterials for Facilitating Bone Defect Repair under Pathological Conditions. Advanced Science (2022).
6. In Vivo Investigation of Polymer-Ceramic PCL/HA and PCL/β-TCP 3D Composite Scaffolds and Electrical Stimulation for Bone Regeneration. Polymers (2021).
7. Pretreating mesenchymal stem cells with electrical stimulation causes sustained long-lasting pro-osteogenic effects. PeerJ (2018).