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US5397359A
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Metal wire structure for endoprosthetics
Assignee: Oscobal AG
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Filing: 1992-08-07
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Granted: 1995-03-14
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Expires: 2012-08-07
Abstract
Abstract The metal wire structure for endoprosthetics is formed of a sintered hollow mesh knitting of elastic metal wires (D), said knitting being preferably manufactured in the manner of a "rete milanese". Said metal wire structure is either used as a coating (1) of an endoprosthesis (3) or, after having been sintered together, as a bone replacement piece. Such a metal wire structure allows to obtain a good anchorage in the bone, since the pore size of said meshes may be adapted to the local conditions, on one hand, and on the other hand, the remaining elasticity of said meshes allows a suitable transition from said prosthesis to the bone.
Inventors
- 👤 Heinz Mittelmeier
- 👤 Beat Leu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:16
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/28; A61L27/30; A61C; A61C8/00; A61C8/0012; A61C8/0013; A61F; A61F2/00; A61F2/02; A61F2/28; A61F2/30; A61F2/30767; A61F2/30907; A61F2/3094; A61F2/30965; A61F2/38; A61F2/44; A61L27/02; A61L27/04; B; B21; B21F; B21F43/00; B22; B22F; B22F7/00; B22F7/002; A61C8/0018; A61C8/0037; A61C2008/0046; A61F2/2875; A61F2/32; A61F2/34; A61F2/36; A61F2/3662; A61F2/367; A61F2/442; A61F2002/30001; A61F2002/30108; A61F2002/30199; A61F2002/30224; A61F2002/30289; A61F2002/30291; A61F2002/30293; A61F2/30771; A61F2002/30841; A61F2002/30909; A61F2002/30914; A61F2002/30915; A61F2002/30968; A61F2230/00; A61F2230/0063; A61F2230/0069; A61F2230/0091; B29; B29C; B29C43/00; B29C43/32; B29C43/36; B29C43/3642; B29C2043/3652
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
54 words
A metal wire structure for prosthetics, consisting of a sintered, hollow mesh knitting covering an external surface of a prosthesis, said knitting being formed of elastic metal wires and consisting of a plurality of interconnected spiral springs, each entwined and sintered together to form an elastic layer, said knitting defining a rete milanese structure.
Claim 2
Dependent Claim
54 words
A metal wire structure for prosthetics, consisting of a sintered, hollow mesh knitting covering an external surface of a prosthesis, said knitting being formed of elastic metal wires and consisting of a plurality of interconnected spiral springs, each entwined and sintered together to form an elastic layer, said knitting defining a rete milanese structure.
Claim 3
Dependent Claim
17 words
The metal wire structure of claim 1, wherein said elastic layer is sintered onto a metal prosthesis.
Claim 4
Dependent Claim
21 words
The metal wire structure of claim 1, wherein said elastic layer is partially melted into a surface of a plastic prosthesis.
Claim 5
Dependent Claim
29 words
The metal wire structure of claim 1, wherein said elastic, metal wires are made of titanium, stainless steel, a cobalt-chrome, a cobalt molybdene, a titanium, or a gold alloy.
Claim 6
Dependent Claim
43 words
The metal wire structure of claim 1, wherein said spiral springs form a porous structure consisting of pores each having a diameter in the range of 0.2 to 1.5 mm, said wires having a diameter in the range of 0.03 to 1.0 mm.
Claim 7
Dependent Claim
15 words
The metal wire structure of claim 1, wherein said metal wire structure has osteotrophic-biactive properties.
Claim 8
Dependent Claim
21 words
The metal wire structure of claim 1, wherein said spiral springs form a porous structure consisting of pores having different sizes.
Claim 9
Dependent Claim
17 words
The metal wire structure of claim 1, wherein said metal wire structure is coated with calcium salts.
Claim 10
Dependent Claim
21 words
The metal wire structure of claim 1, wherein said metal wire structure is coated with a material substantially comprising hydroxyl apatite.
Claim 11
Dependent Claim
18 words
The metal wire structure of claim 1, wherein said metal wire structure is coated with a ceramic material.
Claim 12
Dependent Claim
63 words
A prosthetic device consisting of: a prosthesis; and a metal wire structure covering an external surface of said prosthesis, said metal wire structure comprising a sintered, hollow mesh knitting which is formed of elastic metal wires, said knitting consisting of a plurality of interconnected spiral springs, each entwined and sintered together to form an elastic layer, said knitting defining a rete milanese structure.
Claim 13
Dependent Claim
63 words
A prosthetic device consisting of: a prosthesis; and a metal wire structure covering an external surface of said prosthesis, said metal wire structure comprising a sintered, hollow mesh knitting which is formed of elastic metal wires, said knitting consisting of a plurality of interconnected spiral springs, each entwined and sintered together to form an elastic layer, said knitting defining a rete milanese structure.
Claim 14
Dependent Claim
23 words
The prosthetic device of claim 11, wherein said prosthesis comprises a metal structure, and said elastic layer is sintered onto said metal prosthesis.
Claim 15
Dependent Claim
27 words
The prosthetic device of claim 11, wherein said prosthesis comprises a plastic structure, and said elastic layer is partially melted into a surface of said plastic prosthesis.
Claim 16
Dependent Claim
14 words
The prosthetic device of claim 11, wherein said metal wire structure has osteotrophic-biactive properties.
Claim 17
Dependent Claim
20 words
The prosthetic device of claim 11, wherein said spiral springs form a porous structure consisting of pores having different size.
Claim 18
Dependent Claim
16 words
The prosthetic device of claim 11, wherein said metal wire structure is coated with calcium salts.
Claim 19
Dependent Claim
20 words
The prosthetic device of claim 11, wherein said metal wire structure is coated with a material substantially comprising hydroxyl apatite.
Claim 20
Dependent Claim
17 words
The prosthetic device of claim 11, wherein said metal wire structure is coated with a ceramic material.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-03-13 | 1998-09-12 | 1999-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-03-13 | 2002-09-12 | 2003-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-03-13 | 2006-09-12 | 2007-03-14 | $7700.00 | Window Closed / Lapsed |