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Gait ankle-foot orthoses including an articulated ankle that are designed to make possible and/or improve the functional activities of the ankle joint and foot. These devices provide a controlled fore-and-aft range of movement of the combined ankle joint and foot. These orthoses typically consist of semi-rigid or rigid orthoses encircling the lower leg and foot with an articulated joint mechanism at the ankle joint. Articulated ankle orthoses facilitate the normal function of an otherwise partially or totally disabled ankle joint and/or foot. These devices are intended to alleviate pain and facilitating stance and swing in patients with weak ankle joints (e.g., as a sequel of poliomyelitis). Dedicated articulated ankle orthoses using double adjustable ankle joint orthoses (also known as double upright ankle-foot orthoses) are also available.
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