What are the three requirements for a free knee brace?

The three requirements for a free knee brace focus on achieving functional alignment and stability for the user. In the correct choice, the elements of near vertical hip-trunk alignment, absence of knee flexion contracture, and a foot that rests on the floor are critical.

Near vertical hip-trunk alignment is important because it promotes proper biomechanical function, stability, and reduces the risk of falls or injuries. Proper alignment helps optimize the transfer of forces through the kinetic chain during movement.

The absence of knee flexion contracture is another crucial requirement. A knee flexion contracture can limit the range of motion, impede normal gait, and increase stress on adjacent joints and structures. Ensuring that there is no contracture promotes active knee extension and overall function.

Lastly, having a foot that rests on the floor ensures adequate support and balance during ambulation. It provides a stable base of support, which is key in any device designed for mobility.

Overall, these three components collectively ensure that the knee brace functions effectively in supporting ambulation and maintaining proper alignment, which is essential for the wearer’s mobility and long-term health.