Patent US5002583A successfully refreshed from Google Patents.
EP0499475A2
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EP
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Acetabular prosthesis with anchoring pegs
Assignee: Smith and Nephew Inc
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Filing: 1992-02-13
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Granted: —
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Expires: 2012-02-13
Abstract
Abstract An improved acetabular cup prosthesis has a cup body with a plurality of bores 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 Michelle Ryan
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 13:25
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: 29
Claim 1
Independent Claim
158 words
An acetabular cup prosthesis, comprising: a) an acetabular cup body having an inner concave surface and an outer convex surface; b) a plurality of openings that extend between the inner and outer surfaces along lines that converge at or near the center of curvature of the inner concave surface, the openings forming elongated bores surrounded by a bore wall portion of the acetabular cup body; c) the openings being positioned to define one or more drill guides so that the surgeon can drill into the underlying tissue and form surgical openings therein via one or more of the openings; d) at least one peg member being insertable into and registering respectively with one of the openings, having a first proximate end portion having means thereon for forming a connection with the acetabular cup body at the said one of the openings and with the bore wall, and a second distal end portion adapted to extend into bone tissue.
Claim 2
Dependent Claim
158 words
An acetabular cup prosthesis, comprising: a) an acetabular cup body having an inner concave surface and an outer convex surface; b) a plurality of openings that extend between the inner and outer surfaces along lines that converge at or near the center of curvature of the inner concave surface, the openings forming elongated bores surrounded by a bore wall portion of the acetabular cup body; c) the openings being positioned to define one or more drill guides so that the surgeon can drill into the underlying tissue and form surgical openings therein via one or more of the openings; d) at least one peg member being insertable into and registering respectively with one of the openings, having a first proximate end portion having means thereon for forming a connection with the acetabular cup body at the said one of the openings and with the bore wall, and a second distal end portion adapted to extend into bone tissue.
Claim 3
Dependent Claim
17 words
Apparatus according to claim 1 wherein the inner concave and outer convex surfaces are of parallel curvature.
Claim 4
Dependent Claim
19 words
Apparatus according to claim 1 or claim 2 wherein each of the openings is a generally cylindrically shaped bore.
Claim 5
Dependent Claim
24 words
Apparatus according to any one of claims 1 to 3 wherein the elongated bores include a generally cylindrical portion and a generally frusto-conical portion.
Claim 6
Dependent Claim
19 words
Apparatus according to any one of claims 1 to 4 wherein each peg member is generally cylindrical in configuration.
Claim 7
Dependent Claim
26 words
Apparatus according to any one of claims 1 to 5 wherein each peg member includes a section of larger diameter and a section of smaller diameter.
Claim 8
Dependent Claim
26 words
Apparatus according to claim 6 wherein said larger diameter section is a proximate end portion and said second smaller diameter section is a distal end portion.
Claim 9
Dependent Claim
28 words
Apparatus according to any one of claims 1 to 7 wherein the peg members carries external grooves for forming a connection with the wall of the elongated bores.
Claim 10
Dependent Claim
26 words
Apparatus according to any one of claims 1 to 8 wherein the connection forming means is positioned internally of the outer surface of said peg member.
Claim 11
Dependent Claim
32 words
Apparatus according to claim 9 wherein said peg member has a central longitudinally extending bore and the connection forming means includes means for expanding the peg diameter at the central longitudinal bore.
Claim 12
Dependent Claim
26 words
Apparatus according to any one of claims 1 to 10 wherein the bore wall portion of the acetabular cup body is comprised of a metallic material.
Claim 13
Dependent Claim
26 words
Apparatus according to any one of claims 1 to 11 wherein the connection forming means communicates with the first proximate end portion of the peg member.
Claim 14
Dependent Claim
32 words
Apparatus according to any one of claims 1 to 12 wherein each peg member has a longitudinally extending slot that allows at least a portion of the peg member to deflect laterally.
Claim 15
Dependent Claim
21 words
Apparatus according to any one of claims 1 to 13 wherein the peg member forms an interference fit with the opening.
Claim 16
Dependent Claim
31 words
Apparatus according to any one of claims 13 or 14 wherein the peg member has a longitudinally extending slot to allow the peg to deflect laterally in places along its length.
Claim 17
Dependent Claim
18 words
Apparatus according to any one of claims 1 to 15 wherein the peg has rounded distal end portion.
Claim 18
Dependent Claim
19 words
Apparatus according to any one of claims 1 to 15 wherein the peg has pointed, beveled distal end portions.
Claim 19
Dependent Claim
24 words
Apparatus according to any one of claims 1 to 17 comprising means for expanding the diameter of the peg after insertion into the opening.
Claim 20
Dependent Claim
13 words
Apparatus according to claim 18 wherein the peg has a longitudinally extended opening.
Claim 21
Dependent Claim
46 words
Apparatus according to any one of claims 1 to 19 wherein the peg is of a variable diameter including an enlarged proximate end portion and a smaller diameter distal type portion and the enlarged diameter portion has means for forming a tight fit with the opening.
Claim 22
Dependent Claim
72 words
Apparatus according to any one of claims 1 to 20 comprising a cup liner that registers with and affixes to the cup body at the cup body concave surface, with an annular shoulder on the liner having an inclined annular sidewall that forms an acute angle with the base plane of the cup during use wherein the annular sidewall is corrugated and the annular recess has a corresponding corrugated surface adjacent thereto.
Claim 23
Dependent Claim
26 words
Apparatus according to claim 21 wherein the annular shoulder includes flat annular surface extending between the inclined annular sidewall and the outer surface of the liner.
Claim 24
Dependent Claim
44 words
Apparatus according to any one of claims 1 to 22 wherein the cup body concave surface has polished inner surface means that faces the liner for retarding liner debris generation, and including a polished surface having a roughness of less than 40.6w (sixteen microinches).
Claim 25
Dependent Claim
41 words
Apparatus according to any one of claims 1 to 23 comprising at least one peg closure member being insertable into and registering respectively with an opening and being disposed between the concave and convex surface of the cup body during use.
Claim 26
Dependent Claim
16 words
Apparatus according to claim 24 wherein the peg closure member has a beveled annular wall portion.
Claim 27
Dependent Claim
25 words
Apparatus according to claim 24 or claim 25 wherein the peg closure member has a first larger diameter portion and a second smaller diameter portion.
Claim 28
Dependent Claim
23 words
Apparatus according to claim 26 wherein the peg closure member larger diameter portion defines a proximal end portion of the peg closure member.
Claim 29
Dependent Claim
25 words
Apparatus according to any one of claims 24 to 27 wherein the peg closure member includes means for forming a wedge fit with an opening.
References Cited (Backward Citations)
No citation records indexed.
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