<p>The prosthesis (20) has two legs (21, 22) pivoted relative to each other, where the prosthesis is designed in U-shape and made from elastic material. The legs are arranged in a pivotable manner by a hinge. The legs are pivotably mounted by bolts (25). The legs exhibit toothed wheel sections into which a spreading element (26) is engaged by other toothed wheel portion in a pivotable manner. The legs are pivoted by spring elements made of memory alloy. A lever element is mounted at one of the legs in a pivotable manner.</p>
