US5310408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acetabular cup body prosthesis
Assignee: Smith and Nephew Inc
•
Filing: 1992-08-31
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Granted: 1994-05-10
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Expires: 2012-08-31
Abstract
Abstract An improved acetabular cup prosthesis has a cup body with correspondingly shaped inner convex and outer concave surfaces. A polymer liner fits and attaches to the cup at the concave surface. The inner convex surface is highly polished and mirror-like, for retarding debris generation with the polymer liner and allowing optical pattern inspection. A plurality of bores can be provided, extending between an inner concave surface and an outer convex surface, wherein the bores can function as drill guides for providing alignment in the drilling of surgical openings after the acetabular cup body is placed in a patient. A plurality of pegs or spikes have proximate end portions that have connection members for forming connections with the bores, and distal end portions that can register into the drilled surgical openings.
Inventors
- 👤 Jeff Schryver
- 👤 Jeff Shea
- 👤 Dawn M. Ryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:05
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/34; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/84; A61B17/86; A61B17/8605; A61F2/30721; A61F2/30744; A61F2/3094; A61F2/30942; A61B17/16; A61B17/17; A61B17/1739; A61B17/1742; A61B17/1746; A61B17/861; A61B2017/00004; A61F2/30723; A61F2/30767; A61F2/30771; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30136; A61F2002/30316; A61F2002/30329; A61F2002/30331; A61F2002/30362; A61F2002/30364; A61F2002/30367; A61F2002/30405; A61F2002/30476; A61F2002/30477; A61F2002/30484; A61F2002/305; A61F2002/30507; A61F2002/30535; A61F2002/30537; A61F2002/30538; A61F2002/3054; A61F2002/30667; A61F2002/30682; A61F2002/30685; A61F2002/30772; A61F2002/3079; A61F2002/30878; A61F2002/30891; A61F2002/30894; A61F2002/30963; A61F2002/30968; A61F2002/3401; A61F2002/3412; A61F2002/3443; A61F2220/00; A61F2220/0025; A61F2220/0033; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00389; A61F2310/00592; A61F2310/00796
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
140 words
An acetabular cup prosthesis, comprising: a) an acetabular cup body having an inner concave surface, an outer convex surface for engaging a patient's acetabulum, and an annular base that defines a base plane; b) a polymeric cup liner that lines the cup body at the cup body concave surface during use, the liner having convex and concave surfaces, the concave surface defining an articulating surface that is positioned to receive and articulate with a ball of a prosthesis hip stem, and the convex surface defining a non-articulating surface that is positioned on the opposite side of the liner from the concave surface; c) wherein the cup body concave surface has polished inner surface means that faces the convex side of liner for retarding inner debris generation, and including a polished surface having a roughness of less than eight (8) micro-inches.
Claim 2
Dependent Claim
140 words
An acetabular cup prosthesis, comprising: a) an acetabular cup body having an inner concave surface, an outer convex surface for engaging a patient's acetabulum, and an annular base that defines a base plane; b) a polymeric cup liner that lines the cup body at the cup body concave surface during use, the liner having convex and concave surfaces, the concave surface defining an articulating surface that is positioned to receive and articulate with a ball of a prosthesis hip stem, and the convex surface defining a non-articulating surface that is positioned on the opposite side of the liner from the concave surface; c) wherein the cup body concave surface has polished inner surface means that faces the convex side of liner for retarding inner debris generation, and including a polished surface having a roughness of less than eight (8) micro-inches.
Claim 3
Dependent Claim
31 words
The acetabular cup prosthesis of claim further comprising an array of openings over the cup body and a plurality of peg members removably connectable with the cup body at the openings.
Claim 4
Dependent Claim
17 words
The acetabular cup prosthesis of claim 2 wherein each of the openings defines a smooth walled bore.
Claim 5
Dependent Claim
12 words
The method of claim 3 wherein the bore defines a drill guide.
Claim 6
Dependent Claim
21 words
The apparatus of claim 1, wherein the shell has inner and outer concave and convex surfaces that are of corresponding curvature.
Claim 7
Dependent Claim
17 words
The apparatus of claim 1, wherein each of the openings has a generally cylindrically shaped bore portion.
Claim 8
Dependent Claim
19 words
The apparatus of claim 1, wherein the elongated bores include a generally cylindrical portion and a generally frustro-conical portion.
Claim 9
Dependent Claim
18 words
The apparatus of claim 2, wherein the plurality of peg members are each generally cylindrically shaped in configuration.
Claim 10
Dependent Claim
25 words
The apparatus of claim 2, wherein the plurality of peg members include a proximal section of larger diameter and a distal section of smaller diameter.
Claim 11
Dependent Claim
18 words
The apparatus of claim 1, wherein the acetabular cup body is of a metallic material at the bores.
Claim 12
Dependent Claim
262 words
An acetabular cup prosthesis, comprising: a) an acetabular cup body having an inner concave surface and an outer convex surface; b) a polymeric cup liner that registers with and affixes to the cup body at the cup body concave surface, the liner having convex and concave surfaces, the concave surface defining an articulating surface that is positioned to receive and articulate with a ball of a prosthesis hip stem, and the convex surface defining a non-articulating surface that is positioned on the opposite side of the liner from the concave surface; c) a plurality of openings that extend between the inner and outer surfaces of the cup body along lines that are not parallel, the openings forming elongated bores surrounded by a bore wall portion of the acetabular cup body; d) one or more peg members, each being insertable into and registering respectively with one of the openings, each peg member having a first proximate end portion having means thereon for forming a substantially rigid connection with the acetabular cup body at one of the openings and with the bore wall that enables load transfer between the cup body and peg members without substantial rotational or translational movement between the cup body and each peg member, and a second distal end portion adapted to extend into the underlying tissue after the cup body has been implanted in a patient; and e) wherein the cup body concave surface has polished inner surface means that faces the convex, non-articulating side of the liner for retarding liner debris generation, and including a polished mirror surface.
Claim 13
Dependent Claim
262 words
An acetabular cup prosthesis, comprising: a) an acetabular cup body having an inner concave surface and an outer convex surface; b) a polymeric cup liner that registers with and affixes to the cup body at the cup body concave surface, the liner having convex and concave surfaces, the concave surface defining an articulating surface that is positioned to receive and articulate with a ball of a prosthesis hip stem, and the convex surface defining a non-articulating surface that is positioned on the opposite side of the liner from the concave surface; c) a plurality of openings that extend between the inner and outer surfaces of the cup body along lines that are not parallel, the openings forming elongated bores surrounded by a bore wall portion of the acetabular cup body; d) one or more peg members, each being insertable into and registering respectively with one of the openings, each peg member having a first proximate end portion having means thereon for forming a substantially rigid connection with the acetabular cup body at one of the openings and with the bore wall that enables load transfer between the cup body and peg members without substantial rotational or translational movement between the cup body and each peg member, and a second distal end portion adapted to extend into the underlying tissue after the cup body has been implanted in a patient; and e) wherein the cup body concave surface has polished inner surface means that faces the convex, non-articulating side of the liner for retarding liner debris generation, and including a polished mirror surface.
Claim 14
Dependent Claim
29 words
The acetabular cup prosthesis of claim 1 or 11 wherein the polished inner surface means is a mirror-like surface having a roughness of less than eight (8) micro inches.
Claim 15
Dependent Claim
19 words
The acetabular cup prosthesis of claim 1 further comprising grid means for inspecting the polished inner surface for defects.
Claim 16
Dependent Claim
19 words
The acetabular cup prosthesis of claim 11 further comprising grid means for inspecting the polished inner surface for defects.
Claim 17
Dependent Claim
23 words
The acetabular cup prosthesis of claim 13 or 14 wherein the grid means is a grid comprised of a plurality of concentric rings.
Claim 18
Dependent Claim
14 words
The acetabular prosthesis of claim 1 or 11 wherein the polymer liner is polyethylene.
Claim 19
Dependent Claim
17 words
The acetabular prosthesis of claim 13 wherein the surface mirror defines a lens to view the grid.
Claim 20
Dependent Claim
24 words
The acetabular cup prosthesis of claim 1 or 11 wherein the polished inner surface has a roughness of less than four (4) micro inches.
Claim 21
Dependent Claim
26 words
The acetabular cup prosthesis of claim 1 or 11 wherein the polished inner surface has a roughness of between one (1) and four (4) micro inches.
Claim 22
Dependent Claim
17 words
The acetabular prosthesis of claim 14 wherein the surface mirror defines a lens to view the grid.
Claim 23
Dependent Claim
16 words
The acetabular cup prosthesis of claim 1 wherein the polished surface is a polished mirror surface.
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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) | 1997-05-09 | 1997-11-08 | 1998-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-09 | 2001-11-08 | 2002-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-09 | 2005-11-08 | 2006-05-10 | $7700.00 | Window Closed / Lapsed |