One piece snap fit acetabular cup
A joint prosthesis comprising an acetabular cup comprising at least a first and a second load carrying member, the first load carrying member being substantially more shock absorbing and resilient that the second load carrying member.
1 . A hip joint prosthesis comprising: an artificial acetabular device for securely engaging an artificial femur; the device comprising at least one resilient element formed of a compatible plastic, in a generally cup-shaped configuration defining an articulating surface for articulating engagement with a femoral head; and a mounting surface for mounting engagement with a machined natural acetabulum, said mounting surface comprising a mounting surface portion configured for snap fit engagement with a correspondingly machined natural acetabulum surface portion defined by said machined natural acetabulum.
2 . A hip joint prosthesis comprising: an artificial acetabular device for securely engaging an artificial femur; the device comprising at least one resilient element formed of a compatible plastic, in a generally cup-shaped configuration defining an articulating surface for articulating engagement with a femoral head and a mounting surface for mounting engagement with a machined natural acetabulum, said mounting surface comprising a mounting surface portion configured for snap fit engagement with a correspondingly machined natural acetabulum surface portion defined by said machined natural acetabulum wherein said articulating surface and said mounting surface of rotation lie generally parallel to each other.
3 . A hip joint prosthesis a comprising an artificial acetabular device for securely engaging an artificial femur; the device comprising at least one resilient element formed of a compatible plastic, in a generally cup-shaped configuration defining an articulating surface for articulating engagement with a femoral head and a mounting surface for mounting engagement with a machined natural acetabulum, said mounting surface comprising a mounting surface portion configured for snap fit engagement with a correspondingly machined natural acetabulum surface portion defined by said machined natural acetabulum; said mounting surface portion comprising at least one protrusion.
4 . A hip joint prosthesis comprising an artificial acetabular device for securely engaging an artificial femur; the device comprising at least one resilient element formed of a compatible plastic, in a generally cup-shaped configuration defining an articulating surface for articulating engagement with a femoral head and a mounting surface for mounting engagement with a machined natural acetabulum, said mounting surface comprising a mounting surface portion configured for snap fit engagement with a correspondingly machined natural acetabulum surface portion defined by said machined natural acetabulum; said at least one protrusion comprising a generally peripherally extending protrusion.
5 . A hip joint prosthesis comprising an artificial acetabular device for securely engaging an artificial femur; the device comprising at least one resilient element formed of a compatible plastic, in a generally cup-shaped configuration defining an articulating surface for articulating engagement with a femoral head and a mounting surface for mounting engagement with a machined natural acetabulum; said mounting surface comprising a mounting surface portion configured for snap fit engagement with a correspondingly machined natural acetabulum surface portion defined by said machined natural acetabulum; said mounting surface portion defining an undercut.
6 . A hip joint prosthesis comprising: an artificial acetabular device for securely engaging an artificial femur; the device comprising at least one, resilient element formed of a compatible plastic, in a generally cup-shaped configuration defining an articulating surface for articulating engagement with a femoral head; and a mounting surface for mounting engagement with a machined natural acetabulum, said mounting surface comprising a mounting surface having an outer ridge portion configured for snap fit engagement with a correspondingly machined natural acetabulum surface portion defined by said machined natural acetabulum.
7 . A hip joint prosthesis comprising: an artificial acetabular device for securely engaging an artificial femur; the device comprising at least one resilient element formed of a compatible plastic, in a generally cup-shaped configuration defining an articulating surface for articulating engagement with a femoral head and a mounting surface for mounting engagement with a machined natural acetabulum, said mounting surface comprising a mounting surface having an outer ridge portion configured for snap fit engagement with a correspondingly machined natural acetabulum surface portion defined by said machined natural acetabulum wherein said articulating surface and said mounting surface of rotation lie generally parallel to each other.
8 . A hip joint prosthesis comprising an artificial acetabular device for securely engaging an artificial femur; the device comprising at least one resilient element formed of a compatible plastic, in a generally cup-shaped configuration defining an articulating surface for articulating engagement with a femoral head and a mounting surface for mounting engagement with a machined natural acetabulum; said mounting surface comprising a mounting surface having an outer ridge portion configured for snap fit engagement with a correspondingly machined natural acetabulum surface portion defined by said machined natural acetabulum; said mounting surface portion comprising at least one protrusion.
9 . A hip joint prosthesis comprising an artificial acetabular device for securely engaging an artificial femur; the device comprising at least one, resilient element formed of a compatible plastic, in a generally cup-shaped configuration defining an articulating surface for articulating engagement with a femoral head and a mounting surface for mounting engagement with a machined natural acetabulum, said mounting surface comprising a mounting surface having an outer ridge portion configured for snap fit engagement with a correspondingly machined natural acetabulum surface portion defined by said machined natural acetabulum; said at least one protrusion comprising a generally peripherally extending protrusion.
10 . A hip joint prosthesis comprising an artificial acetabular device for securely engaging an artificial femur; the device comprising at least one resilient element formed of a compatible plastic, in a generally cup-shaped configuration defining an articulating surface for articulating engagement with a femoral head and a mounting surface for mounting engagement with a machined natural acetabulum; said mounting surface comprising a mounting surface having an outer ridge portion configured for snap fit engagement with a correspondingly machined natural acetabulum surface portion defined by said machined natural acetabulum; said mounting surface portion defining an undercut.
11 . A hip joint prosthesis comprising: an artificial acetabular device for securely engaging an artificial femur; the device comprising at least one resilient element formed of a compatible polyurethane, in a generally cup-shaped configuration defining an articulating surface for articulating engagement with a femoral head; and a mounting surface for mounting engagement with a machined natural acetabulum, said mounting surface comprising a mounting surface portion configured for snap fit engagement with a correspondingly machined natural acetabulum surface portion defined by said machined natural acetabulum.
12 . A hip joint prosthesis comprising: an artificial acetabular device for securely engaging an artificial femur; the device comprising at least one element formed of a compatible polyurethane, in a generally cup-shaped configuration defining an articulating surface for articulating engagement with a femoral head and a mounting surface for mounting engagement with a machined natural acetabulum, said mounting surface comprising a mounting surface portion configured for snap fit engagement with a correspondingly machined natural acetabulum surface portion defined by said machined natural acetabulum wherein said articulating surface and said mounting surface of rotation lie generally parallel to each other.
13 . A hip joint prosthesis comprising an artificial acetabular device for securely engaging an artificial femur; the device comprising at least one, resilient element formed of a compatible polyurethane, in a generally cup-shaped configuration defining an articulating surface for articulating engagement with a femoral head and a mounting surface for mounting engagement with a machined natural acetabulum; said mounting surface comprising a mounting surface portion configured for snap fit engagement with a correspondingly machined natural acetabulum surface portion defined by said machined natural acetabulum; said at least one protrusion comprising a generally peripherally extending protrusion.
14 . A hip joint prosthesis comprising an artificial acetabular device for securely engaging an artificial femur; the device comprising at least one, resilient element formed of a compatible polyurethane, in a generally cup-shaped configuration defining an articulating surface for articulating engagement with a femoral head and a mounting surface for mounting engagement with a machined natural acetabulum; said mounting surface comprising a mounting surface portion configured for snap fit engagement with a correspondingly machined natural acetabulum surface portion defined by said machined natural acetabulum; said at least one protrusion defining an undercut.
15 . A hip joint prosthesis comprising: an artificial acetabular device for securely engaging an artificial femur; the device comprising at least one resilient element formed of a compatible polyurethane, in a generally cup-shaped configuration defining an articulating surface for articulating engagement with a femoral head; and a mounting surface for mounting engagement with a machined natural acetabulum, said mounting surface comprising a mounting surface having an outer ridge portion configured for snap fit engagement with a correspondingly machined natural acetabulum surface portion defined by said machined natural acetabulum.
16 . A hip joint prosthesis comprising: an artificial acetabular device for securely engaging an artificial femur; the device comprising at least one resilient element formed of a compatible polyurethane, in a generally cup-shaped configuration defining an articulating surface for articulating engagement with a femoral head and a mounting surface for mounting engagement with a machined natural acetabulum said mounting surface comprising a mounting surface having an outer ridge portion configured for snap fit engagement with a correspondingly machined natural acetabulum surface portion defined by said machined natural acetabulum wherein said articulating surface and said mounting surface of rotation lie generally parallel to each other.
17 . A hip joint prosthesis comprising an artificial acetabular device for securely engaging an artificial femur; the device comprising at least one resilient element formed of a compatible polyurethane, in a generally cup-shaped configuration defining an articulating surface for articulating engagement with a femoral head and a mounting surface for mounting engagement with a machined natural acetabulum; said mounting surface comprising a mounting surface having an outer ridge portion configured for snap fit engagement with a correspondingly machined natural acetabulum surface portion defined by said machined natural acetabulum; said mounting surface portion comprising at least one protrusion.
18 . A hip joint prosthesis comprising an artificial acetabular device for securely engaging an artificial femur, the device comprising at least one resilient element formed of a compatible polyurethane, in a generally cup-shaped configuration defining an articulating surface for articulating engagement with a femoral head and a mounting surface for mounting engagement with a machined natural acetabulum, said mounting surface comprising a mounting surface having an outer ridge portion configured for snap fit engagement with a correspondingly machined natural acetabulum surface portion defined by said machined natural acetabulum; said at least one protrusion comprising a generally peripherally extending protrusion.
19 . A hip joint prosthesis an artificial acetabular device for securely engaging an artificial femur; the device comprising at least one resilient element formed of a compatible polyurethane, in a generally cup-shaped configuration defining an articulating surface for articulating engagement with a femoral head and a mounting surface for mounting engagement with a machined natural acetabulum; said mounting surface comprising a mounting surface having an outer ridge portion configured for snap fit engagement with a correspondingly machined natural acetabulum surface portion defined by said machined natural acetabulum; said mounting surface portion defining an undercut.
20 . A hip joint prosthesis comprising an artificial acetabular assembly for tightly engaging and articulating an artificial femur replacement portion, the assembly comprising:
(i) a resilient element formed of a compatible plastic, in a generally cup-shaped configuration defining a mounting surface portion for mounting engagement with a machined natural acetabulum; said mounting surface comprising a mounting surface portion configured for snap fit engagement with a correspondingly machined natural acetabulum surface portion defined by said machined natural acetabulum; and
(ii) a rigid generally parallel cup-shaped element securely interlocking with said resilient element having an opposite surface portion for articulating engagement with a femoral head; said element being selected from the group consisting of metal, composite material cartilage like material, polyurethane, and DYNEEMA.