A unicondylar joint surface replacement femoral element 10 comprising a metal base member 12 and a polymer joint member 14. The metal base member includes a body portion 20 and a retaining member 24 that extends from the body portion and is configured to be secured within the femoral condyle. The polymeric joint member includes an articulating surface 34 coupled to the body portion of the metal base member and configured to articulate directly to the flat surface 74 of the metal tibial element 70.金属ベース部材１２と重合体関節部材１４とを含む単顆関節面置換用大腿骨要素１０。金属ベース部材は、本体部２０と、本体部から延び大腿骨顆内に固定されるように構成された保持部材２４とを含む。重合体関節部材は金属ベース部材の本体部に結合され、金属脛骨要素７０の平坦な表面７４に直接的に関節接合するように構成された関節面３４を含む。
