High performance knee prostheses

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 interior surface of the component having a proximally extending element with at least one medial or lateral facing 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, 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.

A femoral component for attachment to a resected 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 resected 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;
• 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,
• a profile of the surfaces connecting the interior surface on the posterior side of the anterior portions and the bottom interior surface is one of a curved profile, a curvilinear profile, or a linear profile 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.

A femoral component for attachment to a femur of a leg during total knee replacement surgery, the leg having a mechanical 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 mechanical axis of the leg,
• the interior, backdrafted surface is configured to converge proximally toward the mechanical axis of the leg,
• 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.

A femoral component for attachment to a femur of a leg during total knee replacement surgery, the leg having a mechanical 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 interior surface having a proximally extending element with medial and lateral facing surfaces;
• 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 mechanical axis of the leg,
• the interior, backdrafted surface is configured to converge proximally toward the mechanical axis of the leg;
• 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.

A femoral component for attachment to a resected femur of a leg during total knee replacement surgery, the leg having a mechanical axis, the component comprising:

• condylar sections having posterior portions, anterior portions, and outer surfaces;
• and
• an interior surface adapted to interface with the resected 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;
• 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 mechanical axis of the leg,
• the interior, backdrafted surface is configured to converge proximally toward the mechanical axis of the leg,
• a profile of the surfaces connecting the interior surface on the posterior side of the anterior portions and the bottom interior surface is one of a curved profile, a curvilinear profile, or a linear profile 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.

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 bone cuts in 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;
• a plurality of fin-like structures formed as an integral part of the implant each with at least one generally planar bone contacting surface extending in both an anterior to posterior direction and a distal to proximal direction and at least one of the fin-like structures having a medial facing surface and at least one of the fin-like structures having a lateral facing surface;
• and 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,
• 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, and
• the femoral component is configured to capture a distal extremity of the femur that is resected so that an anterior cut and a posterior cut are not parallel, such that the distal extremity of the femur is physically greater in anterior-posterior dimension than portions more proximal.

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 bone cuts in 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 interior surface of the component having a proximally extending element with at least one medial or lateral facing surface, wherein the proximally extending element includes a plurality of fin-like structures formed as an integral part of the implant each with at least one generally planar bone contacting surface extending in both an anterior to posterior direction and a distal to proximal direction and at least one of the fin-like structures having a medial facing surface and at least one of the fin-like structures having a lateral facing surface, and 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,
• 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, and
• the femoral component is configured to capture a distal extremity of the femur that is resected so that an anterior cut and a posterior cut are not parallel, such that the distal extremity of the femur is physically greater in anterior-posterior dimension than portions more proximal.

A femoral component for attachment to a femur during total knee replacement surgery, the femur having a mechanical axis, the component comprising:

• condylar sections having posterior portions, anterior portions, and outer surfaces;
• and
• an interior surface adapted to interface with bone cuts in 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;
• a plurality of fin-like structures formed as an integral part of the implant each with at least one generally planar bone contacting surface extending in both an anterior to posterior direction and a distal to proximal direction and at least one of the fin-like structures having a medial facing surface and at least one of the fin-like structures having a lateral facing surface, and 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 mechanical axis of the femur,
• the interior, backdrafted surface is configured to converge proximally toward the mechanical 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,
• 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, and
• the femoral component is configured to capture a distal extremity of the femur that is resected so that an anterior cut and a posterior cut are not parallel, such that the distal extremity of the femur is physically greater in anterior-posterior dimension than portions more proximal.

A femoral component for attachment to a femur during total knee replacement surgery, the femur having a mechanical axis, the component comprising:

• condylar sections having posterior portions, anterior portions, and outer surfaces;
• and
• an interior surface adapted to interface with bone cuts in 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 interior surface of the component having a proximally extending element with at least one medial or lateral facing surface, wherein the proximally extending element includes a plurality of fin-like structures formed as an integral part of the implant each with at least one generally planar bone contacting surface extending in both an anterior to posterior direction and a distal to proximal direction and at least one of the fin-like structures having a medial facing surface and at least one of the fin-like structures having a lateral facing surface, and 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 mechanical axis of the femur,
• the interior, backdrafted surface is configured to converge proximally toward the mechanical axis of the femur,
• 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, and
• the femoral component is configured to capture a distal extremity of the femur that is resected so that an anterior cut and a posterior cut are not parallel, such that the distal extremity of the femur is physically greater in anterior-posterior dimension than portions more proximal.

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 is configured to diverge proximally away from the anatomic axis of the femur and at least a portion of the interior surface on the posterior side of the anterior portions has a linear profile when viewed in a generally mediolateral direction,
• 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 a plane defined by the interior surface on the posterior side of the anterior portions such that the planes converge proximally.

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 interior surface of the component having a proximally extending element with at least one medial or lateral facing surface;
• wherein the interior surface on the posterior side of the anterior portions is configured to diverge proximally away from the anatomic axis of the femur and at least a portion of the interior surface on the posterior side of the anterior portions has a linear profile when viewed in a generally mediolateral direction,
• the interior, backdrafted surface is configured to converge proximally toward the anatomic axis of the femur, and
• a plane defined by the backdrafted surface converges with a plane defined by the interior surface on the posterior side of the anterior portions such that the planes converge proximally.

A femoral component for attachment to a resected 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 resected 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;
• wherein the interior surface on the posterior side of the anterior portions is configured to diverge proximally away from the anatomic axis of the femur and at least a portion of the interior surface on the posterior side of the anterior portions has a linear profile when viewed in a generally mediolateral direction,
• the interior, backdrafted surface is configured to converge proximally toward the anatomic axis of the femur,
• a profile of the surfaces connecting the interior surface on the posterior side of the anterior portions and the bottom interior surface is one of a curved profile, a curvilinear profile, or a linear profile when viewed in a medial to lateral direction, and
• a plane defined by the backdrafted surface converges with a plane defined by the interior surface on the posterior side of the anterior portions such that the planes converge proximally.

A femoral component for attachment to a femur of a leg during total knee replacement surgery, the leg having a mechanical 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 is configured to diverge proximally away from the mechanical axis of the femur and at least a portion of the interior surface on the posterior side of the anterior portions has a linear profile when viewed in a generally mediolateral direction,
• the interior, backdrafted surface is configured to converge proximally toward the mechanical axis of the leg,
• 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 a plane defined by the interior surface on the posterior side of the anterior portions such that the planes converge proximally.

A femoral component for attachment to a femur of a leg during total knee replacement surgery, the leg having a mechanical 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 interior surface having a proximally extending element with medial and lateral facing surfaces;
• wherein the interior surface on the posterior side of the anterior portions is configured to diverge proximally away from the mechanical axis of the femur and at least a portion of the interior surface on the posterior side of the anterior portions has a linear profile when viewed in a generally mediolateral direction,
• the interior, backdrafted surface is configured to converge proximally toward the mechanical axis of the leg;
• and
• a plane defined by the backdrafted surface converges with a plane defined by the interior surface on the posterior side of the anterior portions such that the planes converge proximally.

A femoral component for attachment to a resected femur of a leg during total knee replacement surgery, the leg having a mechanical axis, the component comprising:

• condylar sections having posterior portions, anterior portions, and outer surfaces;
• and
• an interior surface adapted to interface with the resected 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;
• wherein the interior surface on the posterior side of the anterior portions is configured to diverge proximally away from the mechanical axis of the femur and at least a portion of the interior surface on the posterior side of the anterior portions has a linear profile when viewed in a generally mediolateral direction,
• the interior, backdrafted surface is configured to converge proximally toward the mechanical axis of the leg,
• a profile of the surfaces connecting the interior surface on the posterior side of the anterior portions and the bottom interior surface is one of a curved profile, a curvilinear profile, or a linear profile when viewed in a medial to lateral direction, and
• a plane defined by the backdrafted surface converges with a plane defined by the interior surface on the posterior side of the anterior portions such that the planes converge proximally.

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 bone cuts in 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;
• a plurality of fin-like structures formed as an integral part of the implant each with at least one generally planar bone contacting surface extending in both an anterior to posterior direction and a distal to proximal direction and at least one of the fin-like structures having a medial facing surface and at least one of the fin-like structures having a lateral facing surface;
• and wherein:
• wherein the interior surface on the posterior side of the anterior portions is configured to diverge proximally away from the anatomic axis of the femur and at least a portion of the interior surface on the posterior side of the anterior portions has a linear profile when viewed in a generally mediolateral direction,
• 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,
• a plane defined by the backdrafted surface converges with a plane defined by the interior surface on the posterior side of the anterior portions such that the planes converge proximally, and
• the femoral component is configured to capture a distal extremity of the femur that is resected so that an anterior cut and a posterior cut are not parallel, such that the distal extremity of the femur is physically greater in anterior-posterior dimension than portions more proximal.

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 bone cuts in 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 interior surface of the component having a proximally extending element with at least one medial or lateral facing surface, wherein the proximally extending element includes a plurality of fin-like structures formed as an integral part of the implant each with at least one generally planar bone contacting surface extending in both an anterior to posterior direction and a distal to proximal direction and at least one of the fin-like structures having a medial facing surface and at least one of the fin-like structures having a lateral facing surface, and wherein:
• wherein the interior surface on the posterior side of the anterior portions is configured to diverge proximally away from the anatomic axis of the femur and at least a portion of the interior surface on the posterior side of the anterior portions has a linear profile when viewed in a generally mediolateral direction,
• the interior, backdrafted surface is configured to converge proximally toward the anatomic axis of the femur,
• a plane defined by the backdrafted surface converges with a plane defined by the interior surface on the posterior side of the anterior portions such that the planes converge proximally, and
• the femoral component is configured to capture a distal extremity of the femur that is resected so that an anterior cut and a posterior cut are not parallel, such that the distal extremity of the femur is physically greater in anterior-posterior dimension than portions more proximal.

A femoral component for attachment to a femur during total knee replacement surgery, the femur having a mechanical axis, the component comprising:

• condylar sections having posterior portions, anterior portions, and outer surfaces;
• and
• an interior surface adapted to interface with bone cuts in 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;
• a plurality of fin-like structures formed as an integral part of the implant each with at least one generally planar bone contacting surface extending in both an anterior to posterior direction and a distal to proximal direction and at least one of the fin-like structures having a medial facing surface and at least one of the fin-like structures having a lateral facing surface, and wherein:
• wherein the interior surface on the posterior side of the anterior portions is configured to diverge proximally away from the mechanical axis of the femur and at least a portion of the interior surface on the posterior side of the anterior portions has a linear profile when viewed in a generally mediolateral direction,
• the interior, backdrafted surface is configured to converge proximally toward the mechanical 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,
• a plane defined by the backdrafted surface converges with a plane defined by the interior surface on the posterior side of the anterior portions such that the planes converge proximally, and
• the femoral component is configured to capture a distal extremity of the femur that is resected so that an anterior cut and a posterior cut are not parallel, such that the distal extremity of the femur is physically greater in anterior-posterior dimension than portions more proximal.

A femoral component for attachment to a femur during total knee replacement surgery, the femur having a mechanical axis, the component comprising:

• condylar sections having posterior portions, anterior portions, and outer surfaces;
• and
• an interior surface adapted to interface with bone cuts in 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 interior surface of the component having a proximally extending element with at least one medial or lateral facing surface, wherein the proximally extending element includes a plurality of fin-like structures formed as an integral part of the implant each with at least one generally planar bone contacting surface extending in both an anterior to posterior direction and a distal to proximal direction and at least one of the fin-like structures having a medial facing surface and at least one of the fin-like structures having a lateral facing surface, and wherein:
• wherein the interior surface on the posterior side of the anterior portions is configured to diverge proximally away from the mechanical axis of the femur and at least a portion of the interior surface on the posterior side of the anterior portions has a linear profile when viewed in a generally mediolateral direction,
• the interior, backdrafted surface is configured to converge proximally toward the mechanical axis of the femur,
• a plane defined by the backdrafted surface converges with a plane defined by the interior surface on the posterior side of the anterior portions such that the planes converge proximally, and
• the femoral component is configured to capture a distal extremity of the femur that is resected so that an anterior cut and a posterior cut are not parallel, such that the distal extremity of the femur is physically greater in anterior-posterior dimension than portions more proximal.