HTO (High Tibial Osteotomy) (Knee Preserving Surgery) (Original Knee Preserving) Articular cartilage is the smooth, white tissue that covers the ends of bones where they come together to form joints. Healthy cartilage in our joints makes it easier to move. It allows the bones to glide over each other with very little friction. In knee joint, there are two compartments & is covered with cartilage. Usually there is equal load on both knee compartments on weight bearing in healthy knee joint. In osteoarthritis of knee joint, only one compartment is bearing weight instead of equal load on both the compartment due to varus or valgus deformity. After decades of year’s cartilage in load bearing compartment get damage & gradually cartilage destroys. In knee restoration surgery, osteotomy of upper tibia is done in such a way that load bearing force is diverted on normal unaffected healthy compartment of knee joint. So pain during weight is completely relieved.