Medial stabilized orthopaedic knee prosthesis

An orthopaedic knee prosthesis comprising:

• a femoral component having a lateral condyle and a medial condyle, wherein the medial condyle includes a femoral articular surface defined by a plurality of curved femoral surface sections that includes a first curved femoral surface section and a second curved femoral surface section posteriorly adjacent the first curved femoral surface section, wherein the first curved femoral surface section is defined by a continually decreasing radius of curvature and the second curved femoral surface section is defined by a constant radius of curvature greater than a posterior-most radii of curvature of the first curved femoral surface section;
• and
• a tibial insert having a lateral articular surface configured to articulate with the lateral condyle of the femoral component and a medial articular surface configured to articulate with the medial condyle of the femoral component, wherein the medial articular surface is asymmetrically shaped relative to the lateral articular surface and includes a medial dwell point that defines a distal-most point on the medial articular surface,
• wherein the medial condyle (i) contacts the medial dwell point at a first contact point on the first curved femoral surface section at a first degree of flexion, the first contact point being defined by the posterior-most radii of curvature of the first curved femoral surface section and (ii) contacts the medial dwell point at a second contact point on the second curved femoral surface section at a second degree of flexion greater than the first degree of flexion, the second contact point being defined by the constant radius of curvature of the second curved femoral surface section, and
• wherein an inferior-superior distance between the medial dwell point and an origin of the constant radius of curvature of the second curved femoral surface section at the second degree of flexion is greater than an inferior-superior distance between the medial dwell point and an origin of the posterior-most radii of curvature of the first curved femoral surface section at the first degree of flexion.

An orthopaedic knee prosthesis comprising:

• a femoral component having a lateral condyle and a medial condyle, wherein the medial condyle includes a femoral articular surface defined by a plurality of curved femoral surface sections that includes a first curved femoral surface section defined by a continually decreasing radius of curvature;
• and
• a tibial insert having a lateral articular surface configured to articulate with the lateral condyle of the femoral component and a medial articular surface configured to articulate with the medial condyle of the femoral component,
• wherein the lateral articular surface includes an arcuate articular path extending in an anterior-posterior direction, wherein the arcuate articular path when viewed in a cross-section plane has a curvature that includes a planar section and wherein the planar section defines a distal-most area of the lateral articular surface, and
• wherein the medial articular surface is asymmetrically shaped relative to the lateral articular surface and includes a medial dwell point that defines a distal-most point of the medial condyle surface, and wherein the medial dwell point is located on the medial condyle surface (i) between a first imaginary medial-lateral bisecting line of the tibial insert that includes an anterior-most end of the planar section of the sagittal curvature of the lateral articular surface and a second imaginary medial-lateral bisecting line of the tibial insert that includes a posterior-most end of the planar section of the sagittal curvature of the lateral articular surface and (ii) posterior to an anterior-posterior midpoint of the planar section of the sagittal curvature of the lateral articular surface.