EP0145339A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Acetabular prosthesis
Assignee: Vitek Inc
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Filing: 1984-11-16
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Granted: —
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Expires: 2004-11-16
Abstract
Abstract An improved acetabular prosthesis (14) is disclosed for use with a femoral head prosthesis. The acetabular prosthesis comprises a rigid cup-shaped member (28) insertable as a friction fit in the acetabulum and providing on its inside a hemispherical socket for the reception of the ball (16) of a femoral head prosthesis (12) and coated on its external surface with a layer (32) of deformable, biocompatible material which upon insertion of the prosthesis moulds itself into conformity with the surface contour of the acetabulum. Interiorly the prosthesis is provided with a wear resistant lining (30).
Inventors
- 👤 Charles Albert Homsy
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 13:04
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/50; A61L27/56; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; A61F2/30907; A61F2/32; A61L27/28; A61L27/34; A61F2002/3233; A61F2/34; A61F2002/348; A61F2002/3493
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
95 words
An acetabular prosthesis comprising a substantially he: " i-spherical, cup-shaped insert (14) insertable as a friction fit in the acetabulum and providing a substantially hemi-spherical socket opening adapted to receive the ball (16) of a femoral head prosthesis (12), characterised in that the insert comprises a rigid, cup-shaped member (28, 28a, 28b) defining on its inside said hemispherical socket and coated on its outer surface with a layer (32, 32a, 32b) of deformable, biocompatible material which, upon insertion of the insert into the acetabulum moulds itself to conform with the surface contour of the acetabulum.
Claim 2
Dependent Claim
95 words
An acetabular prosthesis comprising a substantially he: " i-spherical, cup-shaped insert (14) insertable as a friction fit in the acetabulum and providing a substantially hemi-spherical socket opening adapted to receive the ball (16) of a femoral head prosthesis (12), characterised in that the insert comprises a rigid, cup-shaped member (28, 28a, 28b) defining on its inside said hemispherical socket and coated on its outer surface with a layer (32, 32a, 32b) of deformable, biocompatible material which, upon insertion of the insert into the acetabulum moulds itself to conform with the surface contour of the acetabulum.
Claim 3
Dependent Claim
26 words
A prosthesis according to claim 1, characterized in that said cup-shaped member (28, 28a, 28b) is made from metal, polysulfone polymer, polycarbonate polymer or polyacetal polymer.
Claim 4
Dependent Claim
28 words
A prosthesis according to claim 1 or 2, characterized in that the inner surface of said cup-shaped member is lined with a lining (30) of wear resistant material.
Claim 5
Dependent Claim
17 words
A prosthesis according to claim 3 characterised in that said lining (30) is of ultra-high-molecular weight polyethylene.
Claim 6
Dependent Claim
32 words
A hip prosthesis according to any one of claims 1-4, characterized in that said layer (32, 32a, 32b) of deformable biocompatible material has a porosity in the range from 40% to 90%.
Claim 7
Dependent Claim
20 words
A prosthesis according to claim 5, characterized in that said layer (32, 32a, 32b) has a porosity of approximately 60%.
Claim 8
Dependent Claim
19 words
A prosthesis according to any one of claims 1-6, characterized in that said deformable, biocompatible material is porous polytetrafluoroethylene.
Claim 9
Dependent Claim
28 words
A prosthesis according tc any one cf claime 1-7, character- ized in that said layer (32, 32a, 32b) has a thickness in the range from 1 to 10mm.
Claim 10
Dependent Claim
23 words
A prosthesis according tc any one of claims 1-8, character- izec in that said layer (32, 32a, 32b) has a plurality cf grooves
Claim 11
Dependent Claim
15 words
(36) on its exterior surface to allow, in use, bulk movement of synovial fluid therethrough.
Claim 12
Dependent Claim
15 words
(36) on its exterior surface to allow, in use, bulk movement of synovial fluid therethrough.
Claim 13
Dependent Claim
23 words
A prosthesis according to any one of claims 1-9, characterized in that said layer (32) is adhesively bonded to said cup-shaped member (28).
Claim 14
Dependent Claim
41 words
A prosthesis according to any one of claims 1-9, characterized in that a layer (33, 33a) of medical grade elastomer is located between the external surface of said cup-shaped member (28a, 28b) and said layer (32a, 32b) of deformable, biocompatible material.
Claim 15
Dependent Claim
32 words
A prosthesis according to claim 11, characterized in that said layer (33) of elastomer is mechanically interlocked to said cup-shaped member (28a) and to the layer (32a) of deformable, bio- compatible material.
Claim 16
Dependent Claim
31 words
A prosthesis according to claim 11, characterized in that said layer (32b) of biocompatible material is porous and in that said layer (33a) of elastomer is keyed thereto by impregnation therein.
Claim 17
Dependent Claim
19 words
A prosthesis according to claim 11, 12 or 13, characterized in that said elastomer is a medical grade silicone.
References Cited (Backward Citations)
No citation records indexed.
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