Set for creating an offset-resurfacing hip-joint implant
A set is provided for creating an offset-resurfacing hip-joint implant. The set includes a 1 to 1.5 mm thick metallic acetabulum shell ( 1 ) for insertion into the natural acetabulum, from which only cartilage has been removed, a metallic head cap ( 2 ) for placement on the natural hip-joint head, from which only cartilage has been removed, and an inlay ( 3 ) for insertion into the acetabulum shell ( 1 ) as a sliding partner for the head cap ( 2 ). The inlay has a material thickness of 2 to 5 mm. The head cap ( 2 ) has a wall thickness which increases constantly from a thickness of 2 mm to 6 mm viewed in cross section in the region of the base edge ( 6 ) of the head cap, so that an eccentricity is produced in its outer shape.
1. A set for creating an offset-resurfacing hip-joint implant, the set comprising a 1 to 1.5 mm thick metallic acetabulum shell ( 1 ) shaped for insertion into a natural acetabulum, from which acetabulum only cartilage has been removed, a metallic hip-joint head cap ( 2 ) shaped for placement on a natural hip-joint head, from which head only cartilage has been removed, wherein the head cap ( 2 ) has a wall which increases constantly from a thickness of 2 mm to 6 mm viewed in cross section in a region of a base edge ( 6 ) of the head cap, such that an eccentricity is produced in an outer shape of the head cap, and an inlay ( 3 ) shaped for insertion into the acetabulum shell ( 1 ) as a sliding partner for the head cap ( 2 ), the inlay having a material thickness of 2 to 5 mm.
2. The set according to claim 1 , further comprising a guiding peg ( 10 ) connected to the head cap proximally and in an exact center in a pole region of the head cap ( 2 ).
3. The set according to claim 1 , further comprising at least two anti-rotation elements ( 8 ) projecting into an interior of the head cap ( 2 ).
4. The set according to claim 3 , wherein the anti-rotation elements ( 8 ) have a pin-shaped construction.
5. The set according to claim 2 , further comprising at least two anti-rotation elements ( 8 ) projecting into an interior of the head cap ( 2 ).
6. The set according to claim 5 , wherein the anti-rotation elements ( 8 ) have a pin-shaped construction.