Patent US5217498A successfully refreshed from Google Patents.
US5217498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tibial component of a knee joint prosthesis
Assignee: S&G Implants GmbH
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Filing: 1992-05-21
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Granted: 1993-06-08
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Expires: 2012-05-21
Abstract
Abstract In a tibial portion of a knee joint endoprosthesis with a securing shank (10) to be inserted into the medullar cavity of the tibia, which, on one end, is provided or not with a tibia condyle terminal plate for the attachment of the articular parts of the prosthesis, the securing shank (10), in order to achieve a firm fit of the implant after the implantation, comprises a cylindrical sleeve (11) that is insertable into a cylindrical slotted drilled hole (201) of the tibia with an interior (12) accommodating the spongiosa nucleus (205) of the slotted drilled hole (201), and is fabricated from a metallic material or some other suitable, body-compatible material, while the securing shank (60) is disposed at a right angle to the terminal plate (20) extending parallelly to the horizontal or slightly inclined ostectomy area (206) (FIG. 1).
Inventors
- 👤 Ernst J. Henssge
- 👤 Wolfgang Koller
- 👤 Pavel Dufek
- 👤 Jorg Scholz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:56
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/38; A61F2/389; A61F2002/30001; A61F2002/30108; A61F2002/30199; A61F2002/30224; A61F2002/30235; A61F2/30767; A61F2/30771; A61F2002/30772; A61F2002/30777; A61F2002/30841; A61F2002/30845; A61F2230/00; A61F2230/0063; A61F2230/0069
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
157 words
A tibial portion of a knee joint endoprosthesis with a securing shank to be inserted into the spongiosa bone of the medullar cavity of the tibia, which, on one end is provided with a tibia condyle terminal plate for the attachment of the articular parts of the prosthesis, characterized in that the securing shank comprises a tubular sleeve that is insertable into a matching, slotted drilled hole of the tibia with an interior accommodating the spongiosa bone, the tubular sleeve being provided with a plurality of regularly or irregularly disposed perforations formed in a wall of the sleeve, wherein edges of the perforations constructed in the wall of the sleeve being constructed in a knife blade-like manner, and a second sleeve carried within the first mentioned sleeve, said second sleeve being provided with a plurality of perforations which coincide with the perforations of the first mentioned sleeve, the perforations in said second sleeve defining knife blade-like edges.
Claim 2
Dependent Claim
157 words
A tibial portion of a knee joint endoprosthesis with a securing shank to be inserted into the spongiosa bone of the medullar cavity of the tibia, which, on one end is provided with a tibia condyle terminal plate for the attachment of the articular parts of the prosthesis, characterized in that the securing shank comprises a tubular sleeve that is insertable into a matching, slotted drilled hole of the tibia with an interior accommodating the spongiosa bone, the tubular sleeve being provided with a plurality of regularly or irregularly disposed perforations formed in a wall of the sleeve, wherein edges of the perforations constructed in the wall of the sleeve being constructed in a knife blade-like manner, and a second sleeve carried within the first mentioned sleeve, said second sleeve being provided with a plurality of perforations which coincide with the perforations of the first mentioned sleeve, the perforations in said second sleeve defining knife blade-like edges.
Claim 3
Dependent Claim
36 words
The tibial portion of a knee joint of claim 1 wherein the second sleeve further includes engagement cams adapted for operative engagement with a tool for rotating said second sleeve relative to the first mentioned sleeve.
Claim 4
Dependent Claim
33 words
The tibial portion of a knee joint of claim 1 further including a cap for seating within said second sleeve adjacent the plate such that said cap does not extend above said plate.
References Cited (Backward Citations)
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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) | 1996-06-07 | 1996-12-07 | 1997-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-07 | 2000-12-07 | 2001-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-07 | 2004-12-07 | 2005-06-08 | $7700.00 | Window Closed / Lapsed |