Artificial joint cup
AssigneeJossi Holding AG
InventorsArmin Jossi, Andreas Meyenhofer, Martin Schmidt
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Abstract
An artificial joint cup, in particular a hip joint cup, for implanting in a cavity in a bone. The joint cup is, in particular, substantially in the form of a spherical dome cup, having a convex outer surface and a concave inner surface. In addition, the joint cup comprises an outer diameter and an inner diameter. The ratio of the difference between the outer diameter and the inner diameter, in relation to the outer diameter, is in a range of between 0.5 and 0.07, preferably between 0.3 and 0.075, particularly preferably between 0.2 and 0.1. The joint cup is manufactured from a ceramic material, and the convex outer surface has a micro-structuring.
Claims14
An artificial joint cup for implanting in a cavity in a bone having a convex outer surface and a concave inner surface, having an outer diameter and an inner diameter,
- wherein a ratio of a difference between the outer diameter and the inner diameter, in relation to the outer diameter, lies in a range of between 0.2 and 0.1,
- the joint cup is made of a ceramic material selected from the group consisting of titanium carbide ceramic, titanium oxycarbide ceramic, titanium nitride ceramic, titanium carbonitride ceramic, titanium aluminum nitride ceramic, titanium aluminum carbonitride ceramic, titanium zirconium nitride ceramic and silicon nitride ceramic, and
- the convex outer surface of the ceramic material has a macro-structuring comprising:
- a multiplicity of structure elements being delimited by depressions measuring form 0.3 mm to 3 mm, or
- a pore structure with a multiplicity of cavities that measure from 0.03 mm to 3 mm.
Dependencies are inferred from the claim text.