Why removing your meniscus is a ticking clock for your joints

Science · Published 25 October 2026 Swipe more like this →

In short: For decades, surgeons routinely removed the meniscus to treat sports injuries. We now know this shortcut leads to a slow-motion disaster: the progressive decay of articular cartilage. Understanding the meniscus is no longer just about fixing a tear; it is about preserving the mechanical integrity of the entire knee.

The meniscus is a vital anatomical structure within the knee joint, serving as a critical biomechanical buffer. Its primary function is to prevent the deterioration and degeneration of articular cartilage, effectively acting as a shield against the onset and development of osteoarthritis. Because it distributes mechanical loads, its health is directly tied to the longevity of the joint. Historically, the medical approach to meniscal injury was aggressive. Six decades ago, complete meniscectomy was the standard treatment for sports-related injuries. However, research revealed that removing this tissue caused rapid cartilage decay. This discovery shifted the clinical paradigm toward preservation. In 1982, partial meniscectomy was suggested as a less invasive alternative, and by 1989, the first published account of a meniscus transplant appeared.

Today, the prevailing trend is to maintain the tissue intact whenever possible. Modern surgery faces a significant hurdle: the meniscus is divided into vascularized and avascular regions. Current repair techniques are generally only effective in the peripheral vascularized area. Lesions in the inner avascular region are much harder to heal because they operate under high mechanical demand without a blood supply. While partial meniscectomy remains a common treatment for these inner tears, it often leads to progressive osteoarthritis. This has sparked a surge in bioengineering research, exploring tissue engineering, scaffolds, and stem cell differentiation to restore the meniscus functionally and anatomically. Researchers are investigating various chemical stimuli like TGF-β1 and C-ABC to promote tissue growth. They also explore mechanical factors such as hydrostatic pressure and direct compression. Additionally, scientists are evaluating different cell sources including autologous, allogeneic, and xenogeneic options.

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