Cartilage Repair and Regeneration Techniques

Cartilage damage resulting from trauma, degenerative disease or congenital defects presents a substantial clinical challenge due to the tissue’s avascular nature and limited capacity for intrinsic healing. Traditional strategies for cartilage repair include bone marrow stimulation techniques such as microfracture, which induce subchondral bleeding to recruit mesenchymal stem cells. Cell-based approaches have advanced considerably, with two-stage autologous chondrocyte implantation (ACI) and its scaffold-enhanced variant, matrix-induced autologous chondrocyte implantation (MACI), demonstrating durable hyaline-like tissue formation in focal defects. More recent interest has focused on single-stage procedures such as minced cartilage implantation (MCI), in which healthy cartilage fragments are applied directly to defects, and one-step cell-free scaffold systems that combine biomimetic matrices with growth-factor release. Tissue engineering strategies aim to recapitulate zonal architecture through the use of biocompatible scaffolds, controlled delivery of chondrogenic factors and the incorporation of progenitor or stem cells, including mesenchymal stromal cells and induced pluripotent stem cell (iPSC)-derived chondrocytes. Adjunctive therapies, notably platelet-derived concentrates and bioactive molecules such as fibroblast growth factor and transforming growth factor-β, seek to enhance cell viability, matrix synthesis and integration. Collectively, these innovations strive to bridge the gap between basic science and clinical application by improving tissue quality, reducing operative complexity and extending the spectrum of treatable lesions from small defects to osteoarthritic degeneration.

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Cartilage Repair and Regeneration Techniques publication trend

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

Technical terms

Chondrocyte: The specialised cell responsible for producing and maintaining cartilage extracellular matrix, including collagen and proteoglycans.

Autologous: Derived from the same individual, minimising the risk of immune rejection in transplantation procedures.

Allogeneic: Sourced from a donor of the same species, offering the potential for off-the-shelf therapeutic materials that may require immunomodulation.

Induced pluripotent stem cell (iPSC): Somatic cells reprogrammed to a pluripotent state, capable of differentiating into chondrocytes for regenerative applications.

Minced cartilage implantation (MCI): A one-step technique in which small fragments of autologous cartilage are applied to a defect, often within a carrier matrix, to promote in situ regeneration.

Platelet-rich plasma (PRP): A concentrate of autologous platelets in plasma, rich in growth factors that can enhance cell proliferation and matrix synthesis in repair sites.

References

1. Regeneration of joint surface defects by transplantation of allogeneic cartilage: application of iPS cell-derived cartilage and immunogenicity. Inflammation and Regeneration (2023).
2. Comparison of Minced Cartilage Implantation with Autologous Chondrocyte Transplantation in an In Vitro Inflammation Model. Cells (2024).
3. The Influence of Arthroscopic Shaver Mincing and Platelet-Rich Plasma on Chondrocytes of Intraoperatively Harvested Human Cartilage. The American Journal of Sports Medicine (2023).