Constrained prosthetic knee with rotating bearing

A prosthetic femoral component, comprising:

• a femoral component body;
• a hinge post rotatably connected to said femoral component body;
• and
• a bearing box connected to said femoral component body, said bearing box interposed between said hinge post and said femoral component body, said bearing box including a hyperextension stop, said hinge post including a hyperextension stop surface, said hyperextension stop contacting said hyperextension stop surface to prevent further hyperextension of the prosthetic femoral component body beyond a predetermined point of hyperextension.

A prosthetic knee, comprising:

• a femoral component;
• a tibial component;
• a meniscal component positioned between said femoral component and said tibial component, said femoral component including a condylar bearing surface, said meniscal component including a cooperative bearing surface facing said condylar bearing surface of said femoral component for contacting said condylar bearing surface, said femoral component rotatably connected to said tibial component;
• a hinge pin having a longitudinal hinge pin axis;
• a hinge post rotatably connected to said femoral component which includes said hinge pin passing through a hinge pin aperture in said hinge post for rotatably, hingedly connecting said hinge post to said femoral component so that rotation of said hinge post relative to said femoral component is defined about the longitudinal hinge pin axis, said meniscal component including an a hinge post aperture with a longitudinal hinge post aperture axis that is non-intersecting with said longitudinal hinge pin axis, said hinge post positioned within said hinge post aperture;
• and
• a locking clip, said meniscal component including a locking clip aperture, said hinge post including a locking clip groove, said locking clip traversing said locking clip aperture and engaging said locking clip groove to retain said hinge post within said hinge post aperture.

A prosthetic knee, comprising:

• a femoral component;
• a tibial component;
• a meniscal component positioned between said femoral component and said tibial component, said femoral component including a condylar bearing surface, said meniscal component including a cooperative bearing surface facing said condylar bearing surface of said femoral component, said femoral component rotatably connected to said tibial component;
• a hinge post extension, said hinge post extension rotatably connected to said femoral component, said hinge post extension including an annular groove;
• and
• a tibial bushing including an annular locking protrusion and a retaining flange, said tibial component having a tibial bushing expansion groove, said retaining flange positioned in said tibial bushing expansion groove, said annular locking protrusion engaged in said annular groove.

A prosthetic knee, comprising:

• a femoral component having a hinge post rotatably connected thereto about a rotational axis;
• a tibial component;
• a meniscal component positioned between said femoral component and said tibial component, said femoral component including a condylar bearing surface, said meniscal component including a cooperative bearing surface facing said condylar bearing surface of said femoral component for contacting said condylar bearing surface, said meniscal component including an a hinge post aperture having a longitudinal axis that is non-intersecting with said rotational axis, whereby said hinge post is positioned within said hinge post aperture when the prosthetic knee is operably assembled;
• and
• a locking clip, said meniscal component including a locking clip aperture, said hinge post including a locking clip groove, said locking clip traversing said locking clip aperture and engaging said locking clip groove to retain said hinge post within said hinge post aperture.