US4755183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ligament prosthesis
Assignee: MTG Divestitures LLC
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Filing: 1987-02-09
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Granted: 1988-07-05
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Expires: 2007-02-09
Abstract
Abstract A prosthesis for an anterior cruciate ligament features first and second elongate members, first and second separately tensionable cords, a catch means on the bore surface of each elongate member, and a means for securing the elongate members to the femur and tibia, respectively. The prosthesis has the significant advantage of being able to replace and to perform in substantially the same manner as a natural anterior cruciate ligament. The separate tensioning followed by fixing of the two cords in the implanted prosthesis results in a substantially smoother and more stable range of motion than has been possible with prior art prostheses.
Inventors
- 👤 Robert V. Kenna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:11
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/08; A61F2/0811; A61F2002/0817; A61F2002/0823; A61F2002/0829; A61F2002/0847; A61F2002/0864; A61F2002/087; A61F2002/0876; A61F2002/0882
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
154 words
A prosthesis for a ligament comprising: (a) a first and a second longitudinally-bored elongate member for insertion into and securement within a first channel in a femur and a second channel in a tibia, respectively; (b) a first and a second separately tensionable cord, the first cord being fixedly attached at one end to the first elongate member and adapted to extend at its other end through the bore of the second elongate member, and the second cord being fixedly attached at one end to the second elongate member and adapted to extend at its other end through the bore of the first elongate member; (c) a first and a second means for separately engaging the end of the first cord and the second cord extending through each bore at a desired level of tension; and (d) means for securing the first and the second elongate member to the femur and the tibia, respectively.
Claim 2
Dependent Claim
154 words
A prosthesis for a ligament comprising: (a) a first and a second longitudinally-bored elongate member for insertion into and securement within a first channel in a femur and a second channel in a tibia, respectively; (b) a first and a second separately tensionable cord, the first cord being fixedly attached at one end to the first elongate member and adapted to extend at its other end through the bore of the second elongate member, and the second cord being fixedly attached at one end to the second elongate member and adapted to extend at its other end through the bore of the first elongate member; (c) a first and a second means for separately engaging the end of the first cord and the second cord extending through each bore at a desired level of tension; and (d) means for securing the first and the second elongate member to the femur and the tibia, respectively.
Claim 3
Dependent Claim
30 words
The device of claim 1 wherein the means for engaging comprises projections which engage the first and second cord in the bore of the second or first elongate member, respectively.
Claim 4
Dependent Claim
15 words
The device of claim 1 wherein the first and second cords are made of dacron.
Claim 5
Dependent Claim
15 words
The device of claim 3 wherein the first and second cords are coated with silicone.
Claim 6
Dependent Claim
40 words
The device of claim 1 wherein the means for securing the first and second elongate member to the femur and the tibia, respectively, is a stepped cylindrical elongate member housing adapted to be positioned within the femur and tibia, respectively.
Claim 7
Dependent Claim
14 words
The device of claim 5 wherein the housing is coated with a porous material.
References Cited (Backward Citations)
US3953896A
Cited
US4187558A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-05 | 1992-01-04 | 1992-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-05 | 1996-01-04 | 1996-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-05 | 2000-01-04 | 2000-07-05 | $7700.00 | Window Closed / Lapsed |