Cup with cross-linked polymer layer
OwnerDerek James Wallace McMinninventor
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Abstract
This invention relates to a method of forming a polymer component and comprises blending polymer particles with antioxidant to form a mixture in which the antioxidant coats the polymer particles, irradiating the polymer particles to cross-link the polymer particles therein and forming the irradiated mixture into a consolidated component. The invention also relates to a method of forming an articular surface for a prosthesis and a prosthesis having a polymer articular bearing surface wherein at least one pre-determined portion of the bearing surface is provided with cross-linked polymer bonds.
Claims12
An acetabular cup prosthesis comprising an outer surface and an inner surface, wherein the center of the inner surface is displaced with respect to the center of the outer surface so as to allow for a cup thickness in a pre-determined wear zone that is thicker than that which would be provided if the centers of the inner surface and outer surface were aligned and wherein an inferior edge of the cup is closer to the center of the outer surface than a superior edge is to the center of the outer surface to compensate for the displacement of the inner surface.
Dependencies are inferred from the claim text.