Patent ID: 7955394
Filing Date: 2011-06-07
Classification: A61F

Abstract:
1. An artificial knee joint comprising: a femoral component configured to be fixed onto a distal portion of a femur; a tibial tray configured to be fixed onto a proximal portion of a tibia; and an insert plate fixed onto a top surface of the tibial tray to receive the femoral component sliding thereon, the femoral component including first and second curved femoral articular surfaces and a cam having a spheroidal or substantially cylindrical shape disposed on the rear end of the femoral articular surface and protruding from the femoral articular surface, the insert plate including first and second tibial articular surfaces that contact the first and second femoral articular surfaces, respectively, and a cam-receiving slide surface that contacts the cam, wherein the artificial knee joint has a first sliding state in which the femoral articular surface slides on the tibial articular surface when the knee is extended, a main contacting surface shifts from the first sliding state to a second sliding state in which the cam slides on the cam-receiving slide surface when the knee is bent at an angle between 90 to 160 degrees, and a resection surface of the femoral component and a rear end of the insert plate are offset in the second sliding state when the knee is bent deeply with a bending angle of 180 degrees.