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Knee Replacement

1-The knee is a complex joint where the lower end of thigh bone (femur) and the upper end of the leg bone (tibia) are connected. The weight of the body is transmitted from the femur to the tibia. The “cartilage” (cushioning tissue) is attached to the surfaces of the femur and the tibia where they come in contact. Cartilage provides smooth cushioning and allows easy movement with lubricating fluid called as synovial fluid. Thus the bones do not touch during the movement; the cartilage covering the bone does, and forms a cushion between the bones. Why does the Knee pain? Due to constant use, the cartilage between the femur and the tibia wears out, the bones in the knee joint begin to rub against each other. This results in pain. In the beginning patients experience pain when they squat and exert their weight upon their knees. Gradually, even simple activities like walking and standing cause pain. Arthritis The commonest form of arthritis is osteoarthritis which is nothing but wear and tear of the articular cartilage and the bones. The second common of arthritis is rheumatoid arthritis. Most patients will have multiple joint affection, morning stiffness and welling. Gradually they develop multiple deformities mainly knees, small joints of the hands and hips. Leg Alignment Arthritis may lead to disfigurement of the knee joint. The two bones femur and tibia may not be in a line. This may lead to deformity which further increase pain and increase the risk of injury to the knee joint.