Orthotics and Prosthetics Combined Written Boards 2026 – 400 Free Practice Questions to Pass the Exam

A possible cause for knee buckling in a transfemoral (TF) amputee is when the socket is misplaced anteriorly. When the socket is positioned too far forward, it can lead to improper alignment of the prosthetic knee in relation to the body’s center of mass. This misalignment can create a situation where the knee is more prone to flexion, especially during weight-bearing activities, leading to instability and resultant buckling.

Proper alignment of the socket is crucial for maintaining the natural biomechanics of the amputee’s gait. An anteriorly positioned socket may cause excessive pressure on the knee joint during weight shifts, failing to provide adequate stability. This misalignment can not only contribute to difficulty in ambulation but also increase the risk of falls and other related injuries due to compromised control of the prosthesis.

The other options, while they may relate to different factors in a TF amputee's gait or balance, do not directly influence the knee buckling experienced primarily due to anterior socket placement. Therefore, the correct understanding emphasizes the significance of proper socket alignment in achieving optimal function and stability in a transfemoral prosthesis.