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The medial condyle of the oxidized zirconium femoral component was found to support a maximum fatigue load of 1000 lbs which is equal to 6.67 times bodyweight. The maximum knee joint forces generated occur when rising from a chair without the use of arm support. This force was found tobe approximately 5 times body weight. However, it should be noted that when a person rises from a chair the force is shared by both condyles of the knees. The load in this experiment was applied solely to themedial condyle. It is therefore estimated that the oxidized zirconium femoral component should be able towithstand over 13 times bodyweight.