What is the range of socket flexion recommended for a SACH foot in TT prosthetics?

The recommended range of socket flexion for a SACH (Solid Ankle Cushion Heel) foot in transtibial (TT) prosthetics is typically between 5 to 7 degrees. This slight flexion is essential for optimizing the alignment and function of the prosthetic limb. It allows for better mechanical advantage during gait, promoting a more natural walking pattern.

Socket flexion helps to align the knee joint correctly in relation to the foot, facilitating a smoother transition from heel strike to toe-off and contributing to shock absorption as the individual walks. Additionally, this range supports optimal loading of the residual limb during the stance phase of gait, which is crucial for comfort and stability.

In contrast, greater socket flexion might lead to increased strain on the residual limb, potentially resulting in discomfort and impaired gait mechanics. Thus, adhering to the recommended 5 to 7 degrees ensures that prosthetic function is maximized while maintaining the user's comfort and efficacy in movement.