An orthopedic device is provided having a femoral stem with a proximal end, a distal end, and an intermediate portion extending between the proximal end and the distal end. The intermediate portion tapers from a first cross-sectional geometry near the proximal end to a second cross-sectional geometry near the distal end. A surface region of the femoral stem has a coefficient of friction less than 0.3 with respect to a bone cement. The surface region can include a treated metal region integral with the stem, or a friction reducing coating or sheath that coats or covers a portion of the stem. A collar can be provided near the proximal end of the stem that has a greater diameter than the first diameter of the stem.