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US 4,908,033 AGranted
Hip joint acetabulum
AssigneeSulzer Brothers Limited
InventorsOtto Frey, Rudolf Koch
Life of this patent
Estimating the term…
Abstract
The hip joint acetabulum uses a synthetic ring for snap-fitting the acetabulum body within the outer bowl. The ring is slit to provide for the snap fit connection and is provided with an annular lug which projects into an annular groove within the outer bowl. Recesses are also provided to permit a tool to penetrate into the acetabulum to separate the lug from the remainder of the ring to permit ready detachment of the body from the bowl.
Claims17
A hip joint acetabulum comprising
- an outer bowl of non-deformable material having an inwardly directed annular groove;
- an acetabular body of non-deformable material disposed within said bowl, said body having a cavity for receiving a joint head of a femur prosthesis and an outwardly directed annular groove;
- a split ring of synthetic material disposed in said groove of said body and having an annular lug projecting radially outwardly from a minor circumferential periphery of said ring into said groove of said bowl to secure said body to said bowl, said lug being detachable from the remained of said ring to permit removal of said body from said bowl.
A hip joint acetabulum comprising
- an outer bowl of a metal selected from the group consisting of titanium and titanium alloy and having an inwardly directed annular groove;
- an acetabular body of non-deformable material disposed within said bowl, said body having a cavity for receiving a joint head of a femur prosthesis and an outwardly directed annular groove;
- and
- a split ring of synthetic material disposed in said groove of said body and having an annular lug projection radially outwardly from a minor circumferential periphery of said ring into said groove of said bowl to secure said body to said bowl, said lug being detachable from the remainder of said ring to permit removal of said body from said bowl.
1 more element
A hip joint acetabulum comprising
- an outer bowl of non-deformable material having an interior surface with an inwardly directed annular groove therein;
- an acetabular body of non-deformable material slidably disposed within said bowl on said surface, said body having a cavity for receiving a joint head of a femur prosthesis and an outwardly directed annular groove facing said interior surface and said groove of said bowl;
- and
- a split ring of synthetic material disposed in said groove of said body and slidably received on said surface of said bowl, said ring having an annular lug projecting radially outwardly from a minor circumferential periphery of said ring into said groove of said bowl to secure said body of said bowl, said lug being detachable from the remainder of said ring to permit removal of said body from said bowl.
1 more element
Dependencies are inferred from the claim text.