A forceful twist or sudden stop can cause the end of the femur to grind into the top of the tibia pinching and potentially tearing the cartilage of the meniscus. This injury can also occur with a deep squatting or kneeling, especially when lifting a heavy weight. Meniscus tear injuries often occur during athletic activities, especially in contact sports like football and hockey. Motions that require pivoting and sudden stops, such as tennis and basketball, can also cause meniscus damage.
The risk of developing a torn meniscus increases with age because cartilage begins to gradually wear and lose its resilience. Increasing body weight also puts more stress on the meniscus. Routine daily activities like walking and climbing stairs increase the potential for wear, degeneration, and tearing.
Because some of the fibers of the cartilage are interconnected with those of the ligaments that surround the knee, meniscus injuries may be associated with tears of the collateral and cruciate ligaments, depending upon the mechanism of injury.
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