The menisci are cartilage structures shaped like a “C” that act as a cushion within the knee joint. The menisci are located between the thigh bone (femur) and the shin bone (tibia) and act as impact absorbers—one is on the outer edge of the knee (lateral meniscus) and the other on the inner edge (medial meniscus). The medial meniscus supports 50% of the force applied to the inner compartment, while the lateral meniscus absorbs about 80% of the load on the outer knee compartment.

The menisci play an important role in the knee because they provide joint stability, help protect the ligaments from the forces acting on them, and provide lubrication. Years ago, removing the menisci after a knee injury was common practice. This generally led to arthritis and other degenerative conditions, including knee deformities. Today, menisci are usually repaired after an injury because orthopedists have concluded that they play a fundamental role in the overall health of the knee.

Meniscus repair is also done arthroscopically, with a high patient recovery rate and return to pre-injury daily activities.