US5645593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prosthesis component
Assignee: Corin Medical Ltd
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Filing: 1995-03-17
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Granted: 1997-07-08
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Expires: 2015-03-17
Abstract
Abstract A prosthesis component having a surface intended, in use, to come into contact with bone tissue, wherein at least part of the external surface is textured to provide an array of lands or peaks (12, 12') separated by troughs (14, 14'), the troughs (14, 14') containing particles (20, 20') embedded in a biocompatible bonding material. The embedded particles (20, 20') preferably fill the troughs (14, 14') up to the level of the lands or peaks (12, 12'). This means that bone ingrowth into the lands or peaks (12, 12') and into the embedded particles (20, 20') can take place simultaneously, thus forming a rapid permanent fixing between the component and the bone with a reduced risk of dislodging of the component due to shear stresses and an increased tensile strength between the component and the adjacent bone.
Inventors
- 👤 John Stephen Woods
- 👤 Derek Redvers Cooper
- 👤 Caradoc John Morgan Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:20
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; A61F2/30771; A61F2002/30001; A61F2002/30108; A61F2002/30199; A61F2002/30205; A61F2002/3021; A61F2002/30242; A61F2002/30273; A61F2002/30795; A61F2002/30807; A61F2002/30808; A61F2002/30836; A61F2/3094; A61F2002/30968; A61F2/32; A61F2/34; A61F2002/3412; A61F2002/3414; A61F2230/00; A61F2230/0063; A61F2230/0067; A61F2230/0071; A61F2230/0086; A61F2310/00; A61F2310/00389; A61F2310/00395; A61F2310/00413; A61F2310/00592; A61F2310/00796
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
120 words
A bone-contacting prosthesis component, comprising: a surface intended, in use, to come into contact with bone tissue, wherein at least part of said surface is textured to provide an array of lands separated by troughs, each of said lands being substantially circular, said troughs being depressions below the level of said lands and containing sintered particles embedded in a biocompatible bonding material such that said particles fill said troughs up to said level of said lands, said troughs each have sidewalls, said particles coating said sidewalls of said troughs, said array of lands serving to interrupt shear forces acting to shear away and dislodge said particles from said prosthesis component when said prosthesis component is in contact with bone tissue.
Claim 2
Dependent Claim
120 words
A bone-contacting prosthesis component, comprising: a surface intended, in use, to come into contact with bone tissue, wherein at least part of said surface is textured to provide an array of lands separated by troughs, each of said lands being substantially circular, said troughs being depressions below the level of said lands and containing sintered particles embedded in a biocompatible bonding material such that said particles fill said troughs up to said level of said lands, said troughs each have sidewalls, said particles coating said sidewalls of said troughs, said array of lands serving to interrupt shear forces acting to shear away and dislodge said particles from said prosthesis component when said prosthesis component is in contact with bone tissue.
Claim 3
Dependent Claim
14 words
The prosthesis component of claim 1, wherein said particles are substantially spherical in shape.
Claim 4
Dependent Claim
24 words
A prosthesis component as claimed in claim 2, wherein said particles have an average diameter which is between about 0.05 mm and 0.5 mm.
Claim 5
Dependent Claim
15 words
The prosthesis component of claim 1, wherein said particles are made from a Cobalt-Chrome alloy.
Claim 6
Dependent Claim
19 words
The prosthesis component of claim 1, wherein said substantially circular lands are substantially 1 mm in diameter and height.
Claim 7
Dependent Claim
29 words
The prosthesis component is claimed in claim 5, wherein said prosthesis component has an average minimum distance between said lands which is between about 0.5 mm and 5 mm.
Claim 8
Dependent Claim
23 words
The prosthesis component of claim 6, wherein said prosthesis component has an average minimum distance between said lands which is substantially 1.3 mm.
References Cited (Backward Citations)
GB2142830A
Cited
US4673409A
Cited
GB2181354A
Cited
US4883491A
Cited
US4944759A
Cited
US5007931A
Cited
WO1993000870A1
Cited
US5373621A
Cited
US5263986A
Cited
US5405389A
Cited
GB2268408A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-07-07 | 2001-01-06 | 2001-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-07-07 | 2005-01-06 | 2005-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-07-07 | 2009-01-06 | 2009-07-08 | $7700.00 | Window Closed / Lapsed |