Importance

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Abstract

The invention is shown by a tibia platform comprising a metallic lower part and different bearing parts made of plastic which can be anchored to one another at a posterior position via an open hinge joint. The bearing part has a guide rib for guiding femur condyles which projects upwards by a height of at least 15 mm above the lowest point of the sliding surfaces. Large lateral forces such as occur in high guide ribs and in varus and valgus positions of the knee can be taken up because of a separate metallic pawls which engages at a horizontal projection of the lower part at a distance '1' away from the hinge joint. The pawl is displaceably journalled with respect to the bearing part and is permanently positionable by means of auxiliary means by an enforced movement into a latched position at the projection.

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First Claim