There are three large joints in one knee. Thus we can face 3 different osteoarthritis: femoro-tibial osteoarthritis, patellofemoral osteoarthritis and between the tibia and patella. Structures, ligaments, tendons, cartilage, menisci or defects, axis, mechanical, genetic, may be responsible for early osteoarthritis of the knee. We focus on your pain over time and the reasons for