US 5,314,483 A · Meniscus platform for an artificial knee joint

Abstract

With the invention is shown an artificial knee joint, in which the rear cruciate ligament and the collateral ligaments are assumed as being retained. A metal platform is attached to the tibia and perpendicular to the tibia axis has a plane surface, on which three slide members are slidably disposed so as to guide the metal platform relative to the femur condyles made of metal within the limits of the degree of freedom remaining to them under the tension of the ligaments. A central slide member forms an eminentia rotatable around a pin, which guides the femur condyles directly or indirectly with respect to rotation around the tibia axis and which along its median line, which extends in the sagittal direction in the non-rotated central position, forms a direct or indirect longitudinal guiding device for the femur condyles, while the flexion movement is guided at doubly curved femur condyles by the two outer slide members.

Claims6

Dependent claims

A non-constrainde artificial knee joint comprising:

a platform having a planar surface and an attachment member, the attachment member being adapted to be attached to a tibia having a tibia axis so that the planar surface is perpendicular to the tibia axis when the platform is attached to the tibia;
first and second femur condyles adapted to be connected to a femur;
a central slide member including means for rotatably coupling the central slide member to the platform for rotation about the tibia axis, the central slide member also having a median line extending in a sagittal direction when the central slide member is in a non-rotated central position;
and
and second outer slide members positioned on and free to slide relative to the planar surface in at least a direction of the median line, the central slide member being positioned between the first and second outer slide members, and the first and second outer slide members being positioned against the first and second femur condyles, respectively.

2 more elements

Dependencies are inferred from the claim text.

Meniscus platform for an artificial knee joint

Life of this patent

Meniscus platform for an artificial knee joint

Life of this patent

Abstract

Claims6