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The Power Knee is a powered bionic knee prosthesis designed for use by individuals with above-knee amputation. This bionic knee replaces concentric muscle activity of the quadriceps to bend and straighten the knee. Working as an integrated extension of its user, it synchronizes motion with that of the sound leg. When walking on level ground, the user is gently propelled forward, allowing greater distances to be covered without tiring, while pelvic rotation is enhanced for a more natural gait. On stairs and inclines the knee actively lifts the user up the next step, producing a more secure and natural ascent, foot over foot. The prosthesis lifts the user when standing from a seated position. On level ground and changing terrain, the prosthesis actively lifts the heel off the ground, producing sufficient toe clearance during swing to prevent stumbling and improves user safety.
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