Cartilage is a flexible, rubbery connective tissue that covers the ends of bones, giving cushion and creating alow-friction environment at the joint surface. It also protects the joint against weight-bearing stress. Aging, lifetime walking, vigorous sports and overweight can result in cartilage damage. This wear and tear can ultimately lead to cartilage loss in the joints, this condition is known as osteoarthritis. Osteoarthritis can cause severe pain, inflammation and some extent of disability. This type of cartilage damage typically happens in the knee, but it can also occur in other joints in the elbow, wrist, ankle, shoulder and hip.