Patent ID: 6413261
Filing Date: 2002-07-02
Classification: A61B

Abstract:
A system for reconstruction of the natural twist between a natural knee and a region of the natural hip in an arrangement between an artificial knee joint and the region of the natural hip after partial resection of the natural condyles of the knee joint and bearing of a femur part of the artificial knee joint of a predetermined size on the resection surfaces of the femur bone, comprisinga nail jig (30) with an exactly cuboid-shaped bearing block (31), which has on its end face seen ventrally a leg projecting therefrom and configured for pointing toward the femur, the leg holding on its end a femur contact feeler in a form of a bolt standing perpendicular to the leg for ventrally lying support (C) on the femur (10), and which has on its end face seen dorsally, at least one striking plate (32) projecting therefrom and configured for pointing toward the femur for respective dorsal lying support (A, B) on both dorsal condyle rounds (39, 39â€²), wherein the bearing block (31) has drill hole pairs (33, 34) passing therethrough, whose arrangement represents the respective size of the femur part, and through which fixing nails are insertable, which secure the bearing block (31) in its position on the femur (10), and wherein the bearing block (31) can be pulled away from the femur while leaving behind the fixing nails, and a saw jig having an identical basic shape as the bearing block (31) of the nail jig (30) and having an identical arrangement of drill hole pairs in the bearing block (31), which can be set on the fixing nails, so that its end faces define resection planes, and further having a wedge with a wedge angle &agr;, which can be pushed between the lateral condyle round (39â€²) and the striking plate (32) for compensation of a wedge angle, by which the horizontal tibia section deviates from the knee gap axis.