Patent ID: 8377141
Filing Date: 2013-02-19
Classification: A61B,A61F

Abstract:
1. A knee prosthesis and a trial component therefore comprising: a first femoral component, constituting the knee prosthesis, comprising a first femoral flange from which extend first lateral and medial condyles with a first intercondylar groove therebetween, the first condyles defining respective co-planar interior flat surfaces aligned at opposite sides of said first intercondylar groove to engage, in use, with respective flat lowermost surfaces of a resected femur, a part of the first femoral component extending to a free end of the first femoral component having a flat internal surface angled in a medio-lateral direction and relative to a plane which is normal to said flat surfaces and to the length of said first intercondylar groove; and a second femoral component, constituting the trial component, comprising a second femoral flange from which extend second lateral and medial condyles with a second intercondylar groove therebetween, the second condyles defining respective co-planar interior flat surfaces aligned at opposite sides of said second intercondylar groove, the interior of the second femoral component being formed as five discrete flat sections such that the trial component can be applied to a resected femur and adjustment made for medio-lateral positioning of the trial component and the fifth section at a free end of the second femoral component having an angled slot therein to allow, in use, cutting of the anterior femur to form a flat cut which is angled in a medio-lateral direction and relative to a plane which is normal to said flat surfaces of the second condyles and to the length of the second intercondylar groove, to match said angled flat internal surface of the first femoral component, when the trial component is in a desired medio-lateral position since there will be no scope for altering the desired medio-lateral position once the angled flat cut is made.