The tough yet elastic tissue capping the bone ends in the knee is called articular cartilage. Working in tandem with meniscal cartilage, articular cartilage acts as a shock absorber for the knee, allowing the joint to withstand the day-to-day pressures of walking, running, sitting and standing.
This type of cartilage covers the ends of all the bones at the joint. This cartilage enables a smooth movement and acts as a protective substance to prevent the bones from rubbing against each other. This substance is so efficient that a healthy joint is more slippery than ice sliding on ice.
Like meniscal cartilage, articular cartilage can become damaged through the trauma of injury or as a result of the wear and tear that occurs over a lifetime.