US5021056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Upper tibial osteotomy system
Assignee: Zimmer Inc
•
Filing: 1989-09-14
•
Granted: 1991-06-04
•
Expires: 2009-09-14
Abstract
Abstract A method and apparatus for performing an upper tibia osteotomy comprising cutting a wedge from the bone using a first guide assembly to cut a first slot partially through a bone and a second guide assembly to cut a second intersecting slot to define a wedge shaped bone segment. An external compressor device draws the osteotomy closed by plastic deformation of the unsevered portion of the bone. The bone is secured by a plate and screws.
Inventors
- 👤 Aaron A. Hofmann
- 👤 Albert G. Burdulis, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:42
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/14; A61B17/15; A61B17/151; A61B17/152; A61B17/56; A61B17/58; A61B17/68; A61B17/84; A61B17/86
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
148 words
A surgical kit for performing an upper tibia osteotomy, said kit comprising: a transverse alignment guide assembly having at least one cutting blade alignment slot for guiding a cutting blade to cut a first slot in a tibia; an osteotomy guide comprising mounting means for attaching the guide in a predetermined relation to the first cut, said osteotomy guide having a plurality of aligned parallel cutting blade slots formed therein, said slots being angularly offset from the first slot so that a cutting blade passing through any one of the cutting blade slots will intersect the first slot thereby defining wedge shaped bones of different angular dimensions; and a fixation plate adapted to be secured to the tibia and to hold surfaces of the tibia created by the first and second cuts in proper relationship to each other during the healing of the tibia by new bone growth.
Claim 2
Dependent Claim
148 words
A surgical kit for performing an upper tibia osteotomy, said kit comprising: a transverse alignment guide assembly having at least one cutting blade alignment slot for guiding a cutting blade to cut a first slot in a tibia; an osteotomy guide comprising mounting means for attaching the guide in a predetermined relation to the first cut, said osteotomy guide having a plurality of aligned parallel cutting blade slots formed therein, said slots being angularly offset from the first slot so that a cutting blade passing through any one of the cutting blade slots will intersect the first slot thereby defining wedge shaped bones of different angular dimensions; and a fixation plate adapted to be secured to the tibia and to hold surfaces of the tibia created by the first and second cuts in proper relationship to each other during the healing of the tibia by new bone growth.
Claim 3
Dependent Claim
25 words
A surgical kit according to claim 1 wherein the mounting means further comprises an elongated blade member sized to be mounted in the first cut.
Claim 4
Dependent Claim
46 words
A surgical kit according to claim 2 wherein the transfer alignment guide assembly further comprises an elongated body member and two clamping arms adjustably mounted at opposite ends of said body member, said clamping arms for engaging opposite sides of said tibia head in gripping relation.
Claim 5
Dependent Claim
43 words
A surgical kit according to claim 3 wherein the transverse alignment guide assembly further comprises at least one measurement bore hole, and wherein the surgical kit futher comprises a measurement assembly for measuring the depth of the tibia through the measurement bore hole.
Claim 6
Dependent Claim
55 words
A surgical kit according to claim 4 further comprising a clamp assembly adapted to apply compressive forces to a first portion of the tibia above the first cut and to a second portion of the tibia below the second cut to draw the surfaces of the tibia created by the first and second cuts together.
References Cited (Backward Citations)
US4335715A
Cited
US4501268A
Cited
US4632102A
Cited
US4509511A
Cited
US4627425A
Cited
US4565191A
Cited
US4750481A
Cited
US4736737A
Cited
US4757810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-06-03 | 1994-12-03 | 1995-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-03 | 1998-12-03 | 1999-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-03 | 2002-12-03 | 2003-06-04 | $7700.00 | Window Closed / Lapsed |