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US5879405A
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US
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Acetabular cup body prosthesis
Assignee: Smith and Nephew Inc
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Filing: 1997-05-23
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Granted: 1999-03-09
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Expires: 2017-05-23
Abstract
Abstract An improved acetabular cup prosthesis has a cup body with inner convex and outer concave surfaces. The cup body has an apex and a base that defines a plane. The cup body outer convex surface has a curved annular portion between the base and the transition. In one embodiment, the outer convex surface is a curved annular surface extending in between the rim and a distance about two fifths to three fifths (2/5-3/5) of the distance between the rim and the apex. In another embodiment, a plurality of cup bodies are provided in a range of sizes between about 40 mm and 80 mm. Each cup body has a companion rotary reamer that is correspondingly shaped. The companion cup body is oversized between about 1 mm and 3 mm so that a generally constant change in volume is provided for all cup sizes between 40 mm and 80 mm.
Inventors
- 👤 Michael D. Ries
- 👤 Brian Austin
- 👤 David L. Evans
- 👤 Steve Miller
- 👤 Jeff Shea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:19
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/34; A61B; A61B17/00; A61B17/16; A61B17/1662; A61B17/1664; A61B17/1666; A61F2/30767; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30136; A61F2002/30199; A61F2002/302; A61F2002/30316; A61F2002/30317; A61F2002/30324; A61F2002/30329; A61F2002/30331; A61F2002/30362; A61F2002/30364; A61F2002/30367; A61F2002/30383; A61F2002/30403; A61F2002/30535; A61F2002/30537; A61F2002/30538; A61F2002/3054; A61F2002/3401; A61F2002/3453; A61F2002/3459; A61F2220/00; A61F2220/0025; A61F2220/0033; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0063; A61F2230/0065; A61F2250/00; A61F2250/0014; A61F2250/0036
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
220 words
An acetabular cup prosthesis, comprising: a) a surgically implantable acetabular cup body having an inner surface and an outer convex surface adapted to interface with a patie nt's pelvic bone tissue; b) the cup body having an apex, a base in the form of an annular rim that has a radius, a base center as origin for the radius, a cup axis which intersects the apex and base center, and an annular rim periphery; c) said cup body outer convex surface having first and second curved surface areas; d) the first curved surface area being nearest the apex and being generated by rotating an arc 360° around the cup axis which intersects the base center and apex, the arc being a curved line having a first radius of curvature with a first origin positioned at or near the base center and its terminal end at the apex; e) the second curved surface area being positioned next to the base and being generated by rotating an arc 360° around the cup axis, the arc being a curved line having a second radius of curvature that is larger than the first radius of curvature and with a second origin that is spaced away from the first origin; and f) a smooth transition being provided between the first and second curved surface areas.
Claim 2
Dependent Claim
220 words
An acetabular cup prosthesis, comprising: a) a surgically implantable acetabular cup body having an inner surface and an outer convex surface adapted to interface with a patie nt's pelvic bone tissue; b) the cup body having an apex, a base in the form of an annular rim that has a radius, a base center as origin for the radius, a cup axis which intersects the apex and base center, and an annular rim periphery; c) said cup body outer convex surface having first and second curved surface areas; d) the first curved surface area being nearest the apex and being generated by rotating an arc 360° around the cup axis which intersects the base center and apex, the arc being a curved line having a first radius of curvature with a first origin positioned at or near the base center and its terminal end at the apex; e) the second curved surface area being positioned next to the base and being generated by rotating an arc 360° around the cup axis, the arc being a curved line having a second radius of curvature that is larger than the first radius of curvature and with a second origin that is spaced away from the first origin; and f) a smooth transition being provided between the first and second curved surface areas.
Claim 3
Dependent Claim
19 words
The prosthesis of claim 1 wherein the first and second curved surface areas interface at a smooth transition portion.
Claim 4
Dependent Claim
37 words
The prosthesis of claim 1 wherein the first curved surface area extends from the apex to a transition position that is between about two fifths and three fifths of the distance between the apex and the base.
Claim 5
Dependent Claim
16 words
The prosthesis of claim 1 wherein the second origin is spaced away from the cup axis.
Claim 6
Dependent Claim
24 words
The acetabular cup prosthesis of claim 1 wherein the second origin is spaced about equal distances from the cup axis and the cup base.
Claim 7
Dependent Claim
29 words
The acetabular cup prosthesis of claim 1 wherein the origin of the second radius of curvature is positioned about equal distances from the base origin and the rim periphery.
Claim 8
Dependent Claim
25 words
The acetabular cup prosthesis of claim 1 wherein the rim has a pair of intersecting annular surfaces defining an annular recess at the rim periphery.
Claim 9
Dependent Claim
19 words
The acetabular cup prosthesis of claim 7 wherein one of the annular surfaces is generally parallel to the base.
Claim 10
Dependent Claim
19 words
The acetabular cup prosthesis of claim 8 wherein one of the annular surfaces is generally perpendicular to the base.
Claim 11
Dependent Claim
38 words
The acetabular cup prosthesis of claim 1 wherein the first origin and second origin are spaced apart a distance that is between about one quarter and three quarters of the diameter of the cup body at the base.
Claim 12
Dependent Claim
198 words
An acetabular cup prosthesis, comprising: a) a surgically implantable acetabular cup body having an inner surface and an outer convex surface adapted to interface with a patient's pelvic bone tissue; b) the cup body having an apex, a base in the form of an annular rim that has a radius, a base center as origin for the radius, a cup axis which intersects the apex and base center, and an annular rim periphery; c) said cup body outer convex surface having first and second outer curved surface areas; d) the first curved surface area being nearest the apex and being generated by rotating an arc 360° around the cup axis, the arc being a curved line having a first radius of curvature with an origin positioned near the base center and a terminal end positioned at the apex; and e) the second curved surface area being positioned next to the base and being generated by rotating an arc 360° around the cup axis, the arc being a curved line which has a second radius of curvature with an origin that is spaced from the base center; and f) wherein the second radius is larger than the first radius.
Claim 13
Dependent Claim
198 words
An acetabular cup prosthesis, comprising: a) a surgically implantable acetabular cup body having an inner surface and an outer convex surface adapted to interface with a patient's pelvic bone tissue; b) the cup body having an apex, a base in the form of an annular rim that has a radius, a base center as origin for the radius, a cup axis which intersects the apex and base center, and an annular rim periphery; c) said cup body outer convex surface having first and second outer curved surface areas; d) the first curved surface area being nearest the apex and being generated by rotating an arc 360° around the cup axis, the arc being a curved line having a first radius of curvature with an origin positioned near the base center and a terminal end positioned at the apex; and e) the second curved surface area being positioned next to the base and being generated by rotating an arc 360° around the cup axis, the arc being a curved line which has a second radius of curvature with an origin that is spaced from the base center; and f) wherein the second radius is larger than the first radius.
Claim 14
Dependent Claim
19 words
The prosthesis of claim 11 wherein the first and second curved surface areas interface at a smooth transition portion.
Claim 15
Dependent Claim
35 words
The prosthesis of claim 11 wherein the second curved surface area extends from the base to a position between about two fifths and three fifths (2/5-3/5) of the distance between the base and the apex.
Claim 16
Dependent Claim
222 words
An acetabular cup prosthesis, comprising: a) a surgically implantable acetabular cup body having an inner surface and an outer convex surface adapted to interface with a patient's pelvic bone tissue; b) the cup body having an apex, a base in the form of an annular rim that has a radius, a base center as origin for the radius, a cup axis which intersects the apex and base center, and an annular rim periphery; c) said cup body outer convex surface having first and second outer curved surface areas; d) the first curved surface area being nearest the apex and being generated by rotating an arc 360° around the cup axis, the arc being a curved line having a first radius of curvature with an origin positioned near the base center and a terminal end positioned at the apex; e) the second curved surface area being positioned next to the base and being generated by rotating an arc 360° around the cup axis, the arc being a curved line which has a second radius of curvature with an origin that is spaced from the base center; and f) wherein the first curved surface area extends from the apex toward the base a distance that is between about two fifths (2/5) and three fifths (3/5) of the distance from the apex to the base.
Claim 17
Dependent Claim
222 words
An acetabular cup prosthesis, comprising: a) a surgically implantable acetabular cup body having an inner surface and an outer convex surface adapted to interface with a patient's pelvic bone tissue; b) the cup body having an apex, a base in the form of an annular rim that has a radius, a base center as origin for the radius, a cup axis which intersects the apex and base center, and an annular rim periphery; c) said cup body outer convex surface having first and second outer curved surface areas; d) the first curved surface area being nearest the apex and being generated by rotating an arc 360° around the cup axis, the arc being a curved line having a first radius of curvature with an origin positioned near the base center and a terminal end positioned at the apex; e) the second curved surface area being positioned next to the base and being generated by rotating an arc 360° around the cup axis, the arc being a curved line which has a second radius of curvature with an origin that is spaced from the base center; and f) wherein the first curved surface area extends from the apex toward the base a distance that is between about two fifths (2/5) and three fifths (3/5) of the distance from the apex to the base.
Claim 18
Dependent Claim
19 words
The prosthesis of claim 14 wherein the first and second curved surface areas interface at a smooth transition portion.
Claim 19
Dependent Claim
16 words
The prosthesis of claim 14 wherein the second origin is spaced away from the cup axis.
Claim 20
Dependent Claim
24 words
The acetabular cup prosthesis of claim 14 wherein the second origin is spaced about equal distances from the cup axis and the cup base.
Claim 21
Dependent Claim
25 words
The acetabular cup prosthesis of claim 14 wherein the rim has a pair of intersecting annular surfaces defining an annular recess at the rim periphery.
Claim 22
Dependent Claim
19 words
The acetabular cup prosthesis of claim 14 wherein one of the annular surfaces is generally parallel to the base.
Claim 23
Dependent Claim
19 words
The acetabular cup prosthesis of claim 14 wherein one of the annular surfaces is generally perpendicular to the base.
Claim 24
Dependent Claim
231 words
An acetabular cup prosthesis, comprising: a) a surgically implantable acetabular cup body having an inner surface and an outer convex surface adapted to interface with a patient's pelvic bone tissue; b) the cup body having an apex, a base in the form of an annular rim that has a radius, a base center as origin for the radius, a cup axis which intersects the apex and base center, and an annular rim periphery; c) said cup body outer convex surface having first and second outer curved surface areas; d) the first curved surface area being nearest the apex and being generated by rotating an arc 360° around the cup axis, the arc being a curved line having a first radius of curvature with an origin positioned near the base center and a terminal end positioned at the apex; e) the second curved surface area being positioned next to the base and being generated by rotating an arc 360° around the cup axis, the arc being a curved line which has a second radius of curvature with an origin that is spaced from the base and on a side of the base opposite the apex; and f) wherein the first curved surface area extends from the apex toward the base a distance that is between about two fifths (2/5) and three fifths (3/5) of the distance from the apex to the base.
Claim 25
Dependent Claim
231 words
An acetabular cup prosthesis, comprising: a) a surgically implantable acetabular cup body having an inner surface and an outer convex surface adapted to interface with a patient's pelvic bone tissue; b) the cup body having an apex, a base in the form of an annular rim that has a radius, a base center as origin for the radius, a cup axis which intersects the apex and base center, and an annular rim periphery; c) said cup body outer convex surface having first and second outer curved surface areas; d) the first curved surface area being nearest the apex and being generated by rotating an arc 360° around the cup axis, the arc being a curved line having a first radius of curvature with an origin positioned near the base center and a terminal end positioned at the apex; e) the second curved surface area being positioned next to the base and being generated by rotating an arc 360° around the cup axis, the arc being a curved line which has a second radius of curvature with an origin that is spaced from the base and on a side of the base opposite the apex; and f) wherein the first curved surface area extends from the apex toward the base a distance that is between about two fifths (2/5) and three fifths (3/5) of the distance from the apex to the base.
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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) | 2002-03-08 | 2002-09-07 | 2003-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-03-08 | 2006-09-07 | 2007-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-03-08 | 2010-09-07 | 2011-03-09 | $7700.00 | Window Closed / Lapsed |