Which design features a quad bar to provide knee stability?

The design that features a quad bar to provide knee stability is the TT PTB SCSP Socket Design. The quad bar is an important element in this socket design, as it helps maintain the position of the prosthetic knee in relation to the residual limb. This structure effectively stabilizes the knee during ambulation, providing the patient with better control and confidence while walking.

Quad bars are particularly beneficial for individuals who may have significant knee instability or require additional support while using their prosthesis. The design ensures that forces are distributed appropriately and aids in maintaining the alignment of the knee joint, which is essential for effective gait mechanics.

In contrast, the other designs—such as the PTB Socket Design, TSB Socket Design, and Hydrostatic Design—do not incorporate a quad bar feature specifically aimed at enhancing knee stability. These designs may serve different functions or be tailored for varying levels of limb loss or patient needs, but they do not use the quad bar mechanism that is distinctive to the TT PTB SCSP Socket Design for knee support.