EP0032828A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Tibial prosthesis component and total prosthesis devices employing such components
Assignee: Stryker Ireland Ltd
•
Filing: 1981-01-16
•
Granted: —
•
Expires: 2001-01-16
Abstract
Abstract A tibial prosthesis component to replace a tibial condylar surface of a natural knee joint, said component comprising a main portion adapted for connection to the tibia and a bearing portion made from a plastics material the upper surface of which is adapted to co-operate with a femoral condylar surface of the natural joint or a prosthetic component replacing it, said bearing portion being deformable to provide a releasable snap fit connection to said main portion.
Inventors
- 👤 Anders Lindstrand
- 👤 Gunnar Jonsson
- 👤 Anders Stenstrom
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 10:41
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/38; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30182; A61F2002/30187; A61F2002/3895; A61F2230/00; A61F2230/0002; A61F2230/0028; A61F2230/0034
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
76 words
A tibial prosthesis component to replace a tibial condylar surface of a natural knee joint, said component comprising a main portion adapted for connection to the tibia and a bearing portion made from a plastics material the upper surface of which is adapted to co-operate with a femoral condylar surface of the natural joint or a prosthetic component replacing it, said bearing portion being deformable to provide a releasable snap fit connection to said main portion.
Claim 2
Dependent Claim
76 words
A tibial prosthesis component to replace a tibial condylar surface of a natural knee joint, said component comprising a main portion adapted for connection to the tibia and a bearing portion made from a plastics material the upper surface of which is adapted to co-operate with a femoral condylar surface of the natural joint or a prosthetic component replacing it, said bearing portion being deformable to provide a releasable snap fit connection to said main portion.
Claim 3
Dependent Claim
37 words
A tibial prosthesis component as claimed in claim 1 in which said main portion includes a support tray part of which is provided with inwardly projecting lugs beneath which part of said bearing portion can be located.
Claim 4
Dependent Claim
23 words
A tibial prosthesis component as claimed in claim 2 in which said bearing portion has spaced apart lips which locate beneath said lugs.
Claim 5
Dependent Claim
44 words
A tibial prosthesis component as claimed in claim 2 or claim 3 in which said support tray has a raised rim on which said inwardly projecting lugs are provided, a lower part of said bearing portion locating on said support tray within said rim.
Claim 6
Dependent Claim
24 words
A tibial prosthesis component as claimed in claim 4 in which said support tray and said bearing portion are substantially D-shaped in plan view.
Claim 7
Dependent Claim
32 words
A tibial prosthesis component as claimed in claim 5 in which said lugs are located at the spaced apart corners adjacent the ends of the curved peripheral portion of the support tray.
Claim 8
Dependent Claim
35 words
A tibial prosthesis component as claimed in any one of the preceding claims 2 to 6 in which said bearing portion has an upper part located above said lugs when in position on said support.
Claim 9
Dependent Claim
34 words
A tibial prosthesis component as claimed in claim 7 when dependent on claims 3 to 6 in which said bearing portion has a groove in its side walls beneath which the lips are formed.
Claim 10
Dependent Claim
25 words
A tibial prosthesis component as claimed in any one of the preceding claims in which said main portion is provided with a downwardly projecting spigot.
Claim 11
Dependent Claim
24 words
A tibial prosthesis component as claimed in claim 9 in which said main portion is also provided with a second downwardly projecting location spigot:
Claim 12
Dependent Claim
31 words
A tibial prosthesis component as claimed in any one of the preceding claims in which the lower surface of said main portion is provided with a patterned texture to assist location.
Claim 13
Dependent Claim
24 words
A tibial prosthesis component as claimed in any one of the preceding claims in which the upper surface of the bearing portion is dished.
Claim 14
Dependent Claim
53 words
A.total prosthesis device.comprising a tibial prosthesis component as claimed in any one of the preceding claims and a femural prosthesis component adapted for connection to a femur to replace a femural condyle, said femural.component having a curved bearing surface for co-operation with the upper surface of said bearing portion of the tibial component.
Claim 15
Dependent Claim
36 words
A total prosthesis device as claimed in claim 13 in which a second tibial prosthesis component and a second femural component are provided to replace both tibial condyles and both femural condyles of the natural joint.
Claim 16
Dependent Claim
16 words
A total prosthesis device as claimed in claim 14 in which the femural components are inter-connected.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.