What is the landmark for locating the knee center when casting for a KAFO?

When casting for a KAFO (Knee-Ankle-Foot Orthosis), the correct landmark for locating the knee center is the midpoint between the medial and lateral femoral epicondyles, often referenced in formal descriptions as the midpoint between the MPT (medial patellar tendon) and the adductor tubercle. This location is critical because it provides an accurate representation of the knee center in relation to the functional biomechanics of the joint, ensuring optimal alignment and function of the orthosis.

This midpoint is essential; it accounts for both the anatomical variability between individuals and the need for proper range of motion relative to the patient's biomechanics. Proper alignment here supports effective movement patterns and helps to optimize the gait cycle for the user.

Other landmarks mentioned, such as the distal femur or the lateral condyle of the tibia, do not provide the same level of functional understanding of the knee joint's mechanics and can lead to misalignments in the prosthetic fitting process. The medial malleolus is relevant in the context of foot position but does not pertain to knee joint alignment. Thus, identifying the correct midpoint plays a significant role in the overall effectiveness and comfort of the KAFO.