Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Patent
1997-02-21
1999-09-21
Jones, Mary Beth
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
A61F 238
Patent
active
059547707
ABSTRACT:
An endoprosthetic knee joint has a femur portion, a tibia portion, and a coupling portion. The femur portion has a femur shaft having convexly curved condyle shells at a lower end, the shells having primary slide surfaces and two spaced apart side walls forming an intercondylar space. The tibia portion has a tibia shaft with a tibia plateau at an upper end, upon which are formed secondary slide surfaces. The tibia plateau has an axial recess. The coupling portion has a coupling pin rotatably housed in the recess, and a joint head at the upper end of the pin projects into the intercondylar space. The joint head has a bore extending transversely to the femur axis and is pivotally mounted by a coupling bolt which extends through the bore and is supported on the side walls of the condyle shells. A slide bush may be provided about the medial portion of the coupling bolt to enhance flexion/extension capability and varus/valgus movement. This knee joint provides higher resistance to breakage and enables varus/valgus compensation in the case of erroneous axial positionings.
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Horber Willi
Schmotzer Hans
Jones Mary Beth
Plus Endoprothetik AG
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