Upper tibial osteotomy system

• US 5,021,056 A
• Filed: 09/14/1989
• Issued: 06/04/1991
• Est. Priority Date: 09/14/1989
• Status: Expired due to Term

• Current Assignee: Zimmer Incorporated (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Intermedics Orthopedics, Inc.
• Inventors: Burdulis, Albert G. Jr., Hofmann, Aaron A.
• Primary Examiner(s): Isabella, David J.
• Application Number:
  US07/407,244
• Time in Patent Office: 628 Days
• Field of Search: 606/86, 606/87, 606/88, 606/79, 606/82, 623/16, 623/66
• US Class Current: 606/86.00R
• CPC Class Codes: A61B 17/15 Guides therefor arrangements for guiding straight saw blades in general B23D51/025
• CPC Class Codes: A61B 17/152 for removing a wedge-shaped piece of bone
• CPC Class Codes: A61B 17/86 Pins or screws or threaded wires; nuts therefor A61B17/72 take precedence

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.

Claims

1. 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.

2. 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.

3. 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.

4. 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.

5. 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.