US5201769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hip stem with proximal build-up blocks
Assignee: Zimmer Inc
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Filing: 1991-09-23
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Granted: 1993-04-13
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Expires: 2011-09-23
Abstract
Abstract A prosthetic hip stem implant with U-shaped buildup block that can be selectively connected to the hip stem adjacent to the flange to augment the height of the prosthesis. The buildup block will be available in three heights to accommodate for varying degrees of bone loss as determined intraoperatively.
Inventors
- 👤 Steven F. Schutzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:27
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/36; A61F2/3662; A61F2/367; A61F2/3609; A61F2002/30001; A61F2002/30316; A61F2002/30329; A61F2002/30433; A61F2002/30535; A61F2002/30604; A61F2002/3625; A61F2002/3631; A61F2220/00; A61F2220/0025; A61F2220/0041
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
136 words
A prosthetic implant having a first portion including a neck and a second portion including a stem, with a flange extending outwardly from a junction of said first and second portions, said stem extending longitudinally away from said flange and comprising a distal portion for seating within an intramedullary canal of a bone, and a buildup block having a predetermined height, wherein said flange includes a keel extending downward from a lower surface of said flange, said buildup block includes a groove formed in an upper surface thereof, said flange keel being accommodated within said buildup block groove with said buildup block connected to said flange and said surfaces in contact with one another, and said buildup block for contacting said bone to space said first portion of said implant a predetermined distance from said bone.
Claim 2
Dependent Claim
136 words
A prosthetic implant having a first portion including a neck and a second portion including a stem, with a flange extending outwardly from a junction of said first and second portions, said stem extending longitudinally away from said flange and comprising a distal portion for seating within an intramedullary canal of a bone, and a buildup block having a predetermined height, wherein said flange includes a keel extending downward from a lower surface of said flange, said buildup block includes a groove formed in an upper surface thereof, said flange keel being accommodated within said buildup block groove with said buildup block connected to said flange and said surfaces in contact with one another, and said buildup block for contacting said bone to space said first portion of said implant a predetermined distance from said bone.
Claim 3
Dependent Claim
14 words
The implant of claim 1 wherein said buildup block is generally U-shaped in cross-section.
Claim 4
Dependent Claim
28 words
The implant of claim 1 wherein said buildup block further includes a keel extending downwardly from said buildup block for engagement with a proximal groove in said bone.
Claim 5
Dependent Claim
17 words
The implant of claim 1 wherein the height of the buildup block is 10 to 30 mm.
Claim 6
Dependent Claim
132 words
A buildup block for a prosthetic hip stem implant, said implant including a stem portion and a neck portion with an integral flange at their junction, said flange extending transverse to said stem and including a lower surface and a keel extending downward from said lower surface, said buildup block including a groove formed in an upper surface thereof, said flange keel being accommodated within said buildup block groove with said buildup block connected to said flange and said surfaces in contact with one another, said buildup block defining a height "h" between upper and lower surfaces of said buildup block, said buildup block being adapted for connection to said hip stem to define a predetermined height from the lower surface of said buildup block to the lower surface of said flange.
Claim 7
Dependent Claim
132 words
A buildup block for a prosthetic hip stem implant, said implant including a stem portion and a neck portion with an integral flange at their junction, said flange extending transverse to said stem and including a lower surface and a keel extending downward from said lower surface, said buildup block including a groove formed in an upper surface thereof, said flange keel being accommodated within said buildup block groove with said buildup block connected to said flange and said surfaces in contact with one another, said buildup block defining a height "h" between upper and lower surfaces of said buildup block, said buildup block being adapted for connection to said hip stem to define a predetermined height from the lower surface of said buildup block to the lower surface of said flange.
Claim 8
Dependent Claim
29 words
The buildup block of claim 5 wherein said buildup block further includes a keel extending downwardly from said buildup block for engagement with a proximal groove in said bone.
Claim 9
Dependent Claim
18 words
The buildup block of claim 5 wherein the height of the buildup block is 10 to 30 mm.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-12 | 1996-10-12 | 1997-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-12 | 2000-10-12 | 2001-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-12 | 2004-10-12 | 2005-04-13 | $7700.00 | Window Closed / Lapsed |