Patent ID: 7922771

Claim:
A femoral component for attachment to a femur during total knee replacement surgery, the femur having an anatomic axis, the component comprising: condylar sections having posterior portions, anterior portions, and outer surfaces; and an interior surface adapted to interface with the femur; the interior surface of the component including a backdrafted surface on anterior surfaces of the posterior portions of the condylar sections, a bottom interior surface, an interior surface on the posterior side of the anterior portions, and surfaces connecting the interior surface on the posterior side of the anterior portions and the bottom interior surface; the bottom interior surface having a proximally extending element possessing at least one generally medially or laterally facing bone contacting surface; wherein the interior surface on the posterior side of the anterior portions has a planar surface which is configured to diverge proximally away from the anatomic axis of the femur, the interior, backdrafted surface is configured to converge proximally toward the anatomic axis of the femur, the surfaces connecting the interior surface on the posterior side of the anterior portions and the bottom interior surface including a curved surface when viewed in a medial to lateral direction, and a plane defined by the backdrafted surface converges with the plane defined by the interior surface on the posterior side of the anterior portions such that the planes converge proximally.