Patent ID: 6117175
Filing Date: 2000-09-12
Classification: A61F

Abstract:
A replacement knee prosthesis assembly for replacing an earlier implanted prosthesis, the replacement prosthesis comprising:(a) a femoral implant comprising a bicondylian part comprising a pair of condyles disposed so as to define an intercondylian notch and a posteriorly extending hemispherical cavity central of the pair of condyles,(b) a tibial implant comprising a tibial base, at least one disc removably mounted to said tibial base, on which said pair of condyles is rotatably slidable, and which provides a first articulation, a catch mounted to said tibial base, the catch comprising an end portion, and which is provided with a spherical head accommodated within said central cavity of said pair of condyles so as to provide a second spherical articulation between said femoral implant and said tibial implant, and(c) said spherical head and said at least one disc being configured to be selectively attached with the assembly, and being selected from a set of heads and discs having appropriate height and thicknesses such that a proper ligamentary tension can be obtained for a patient.