What alignment adjustment should be made when flexing an above-knee socket to accommodate a flexion contracture?

When addressing a flexion contracture in an above-knee socket, moving the prosthetic knee posterior is the appropriate alignment adjustment. Flexion contractures can limit the patient's ability to fully extend their knee, so positioning the knee joint posteriorly in the socket allows for better alignment and function. This adjustment compensates for the inability to fully extend, improving stability and facilitating a more natural gait.

By shifting the knee joint posteriorly, the alignment creates a more comfortable position for the residual limb, allowing the individual to maintain better balance and reduce strain on the musculature surrounding the joint. This positioning takes into account the altered biomechanics caused by the flexion contracture, helping to enhance the overall efficacy of the prosthetic.

Other alignment adjustments, such as moving the knee anterior or shortening the socket length, may not effectively compensate for the flexion contracture and can even exacerbate gait inefficiencies or cause discomfort. Additionally, heel height adjustments primarily affect the foot position relative to the ground and do not directly address the needs created by a knee flexion contracture.