ABSTRACT

Severe knee contractures are one of the most difficult problems causing gait disturbances (1). Extension contractures of the knee (ECK) cause swing-through dysfunction as well as dampen a small flexion moment in mid-stance (2). Flexion contractures of the knee (FCK) are more problematic because the center of gravity permanently falls posterior to the knee and the leg is functionally shortened. This shortens the stride length and fatigues the extensor mechanism, profoundly disrupting gait mechanics (2-5). Unlike isolated ankle or hip contractures, FCK cannot be well compensated by the other lower extremity joints or the lumbar spine.