Patent US3789205A successfully refreshed from Google Patents.
Patent US4759767A successfully refreshed from Google Patents.
US4759767A
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US
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Prosthesis for tibial component of knee joint
Assignee: Wright Medical Technology Inc
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Filing: 1987-08-10
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Granted: 1988-07-26
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Expires: 2007-08-10
Abstract
Abstract A prosthesis for replacing the proximal end of a tibia, installable without bone cement which includes a tibial plateau portion adapted to receive an articulation insert. Integral with the underside of the plateau is an intermedullary fixation stem to which is attached a medial-lateral fin. Attached to each end of the fin is a transverse fin which provides a dual "T" configuration, which provides superior anchoring of the prosthesis.
Inventors
- 👤 James A. Lacey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:34
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/38; A61F2/389; A61F2/30767; A61F2/30771; A61F2002/30878; A61F2002/30884
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
134 words
A prosthetic device for replacing at least a portion of the proximal end of a tibia comprising a unitary, one-piece device adapted to be connected to the proximal end of a resected tibia without cement and to replace the articulating surfaces thereof, said prosthesis including (A) a tibial plateau portion having means to receive a artculation insert, (B) a intermedullary fixation stem attached to the underside of said plateau portion, (C) a medial-lateral fin having one side attached to the underside of said plateau portion and an adjacent side attached to said stem and extending outwardly in a medial and lateral direction from each side of said stem, (D) a terminal fin member attached to each end of said medial-lateral fin and positioned transverseley relative thereto and extending from said plateau portion distally therefrom.
Claim 2
Dependent Claim
134 words
A prosthetic device for replacing at least a portion of the proximal end of a tibia comprising a unitary, one-piece device adapted to be connected to the proximal end of a resected tibia without cement and to replace the articulating surfaces thereof, said prosthesis including (A) a tibial plateau portion having means to receive a artculation insert, (B) a intermedullary fixation stem attached to the underside of said plateau portion, (C) a medial-lateral fin having one side attached to the underside of said plateau portion and an adjacent side attached to said stem and extending outwardly in a medial and lateral direction from each side of said stem, (D) a terminal fin member attached to each end of said medial-lateral fin and positioned transverseley relative thereto and extending from said plateau portion distally therefrom.
Claim 3
Dependent Claim
18 words
A tibial prosthesis according to claim 1 wherein said prosthesis is constructed from a metal or metal alloy.
Claim 4
Dependent Claim
23 words
A tibial prosthesis according to claim 1 wherein said stem is provided with elongated vertical flutes on the anterior and posterior surfaces thereof.
Claim 5
Dependent Claim
17 words
A tibial prosthesis according to claim 1 wherein said medial-lateral fin is provided with holes extending therethrough.
Claim 6
Dependent Claim
26 words
A tibial prosthesis according to claim 1 wherein the under surface of said plateau portion is provided with a waffle type texture to promote bone ingrowth.
References Cited (Backward Citations)
US3728742A
Cited
US3869730A
Cited
US4016606A
Cited
SU719625A1
Cited
SU757159A1
Cited
DE3205527A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-26 | 1992-01-25 | 1992-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-26 | 1996-01-25 | 1996-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-26 | 2000-01-25 | 2000-07-26 | $7700.00 | Window Closed / Lapsed |