Method and apparatus for tibial resection

• US 5,643,272 A
• Filed: 06/07/1995
• Issued: 07/01/1997
• Est. Priority Date: 09/02/1994
• Status: Expired due to Term

• Current Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Hudson Surgical Design, Inc.
• Inventors: Haines, Timothy G., Goldstein, David B.
• Primary Examiner(s): Tucker, Guy V.
• Application Number:
  US08/479,363
• Time in Patent Office: 755 Days
• Field of Search: 606/88, 606/87, 606/86, 606/80, 606/82, 606/96
• US Class Current: 606/80
• CPC Class Codes: A61B 17/155 Cutting femur
• CPC Class Codes: A61B 17/157 Cutting tibia
• CPC Class Codes: A61B 17/1675 for the knee
• CPC Class Codes: A61B 17/1764 for the knee
• CPC Class Codes: A61B 2017/1602 Mills

Abstract

A method an apparatus for resecting a proximal tibia during a knee replacement operation is provided. The apparatus includes an ankle clamp, an alignment rod, a fixation head, cutting guide clamps having cutting guide slots therein, and a milling bit. The method includes the steps of attaching the ankle clamp about the ankle, interconnecting the distal end of the alignment rod with the ankle clamp, interconnecting the fixation head with the proximal end of the alignment rod, partially attaching the fixation head to the proximal tibia, aligning the alignment rod, completely attaching the fixation head to the proximal tibia, interconnecting the cutting guide clamps with the alignment rod, positioning the cutting guide clamps about the proximal tibia, securing the cutting guide clamps to the tibia at a proper location, removing the fixation head, placing the milling bit within the cutting guide slots, and cutting the proximal tibia with the milling bit.

Claims

1. A method for resecting a proximal tibia comprising the steps of:

attaching an ankle clamp about an ankle;

interconnecting an alignment rod at a distal end thereof with the ankle clamp;

interconnecting a fixation head with a proximal end of the alignment rod;

partially attaching the fixation head to the proximal tibia;

aligning the alignment rod;

completely attaching the fixation head to the proximal tibia;

interconnecting cutting guide clamps with the alignment rod;

positioning the cutting guide clamps about the proximal tibia;

securing the cutting guide clamps to the tibia at a proper location;

removing the fixation head from the tibia; and

cutting the proximal tibia with a milling bit.

2. The method of claim 1 wherein the step of interconnecting the cutting guide clamps with the alignment rod further includes the steps of:

positioning a cutting guide linkage along the alignment rod; and

interconnecting the cutting guide clamps with the cutting guide linkage by means of locating pivot apertures in the cutting guide clamps onto a pivot shaft formed on the cutting guide linkage.

3. The method of claim 2 wherein the step of positioning the cutting guide clamps about the proximal tibia comprises manipulating hand grips interconnected with the cutting guide clamps to move the cutting guide clamps against the proximal tibia.

4. The method of claim 3 wherein the step of positioning the cutting guide clamps about the proximal tibia further includes the step of adjusting the cutting guide clamps with respect to cutting guide members extending from the hand grips.

5. The method of claim 4 wherein the step of cutting the proximal tibia with a milling bit comprises the steps of:

inserting the milling bit into guide slots formed in the cutting guide clamps;

engaging the milling bit with drive means;

capturing ends of the milling bit with handle means; and

guiding the milling bit through the guide slots in the cutting guide clamps to resect the proximal tibia.

6. An apparatus for resecting a proximal human tibia comprising:

alignment means having proximal and distal ends;

distal attachment means for attaching to a tibia, the distal attachment means interconnected with the distal end of the alignment means;

fixation means for attachment to the proximal tibia, the fixation means interconnected with the proximal end of the alignment means for aligning the alignment means;

cutting guide means interconnected with the alignment means, the cutting guide means comprising two members in opposing relationship including;

guide surfaces defining linear paths located within cutting guide slots formed in the cutting guide means;

entrance areas comprising upturned slot areas communicating with the cutting guide slots for receiving a milling bit;

the cutting guide means including hand grips, mating cross bars having pivot apertures and clamp members, the cutting guide means adjustably interconnected with the clamp members;

fixation means for affixing the cutting guide means to a tibia; and

milling means for cutting a tibia, the milling means received and guided by the cutting guide slot of the cutting guide means for resecting a tibia.

7. The apparatus of claim 6 further including cutting guide linkage means for interconnecting the cutting guide means with the alignment means, the cutting guide linkage means comprising an aperture for receiving the alignment rod and a post for inserting through the pivot apertures of the mating cross bars of the cutting guide means.

8. An apparatus for resecting a proximal human tibia comprising:

alignment means having proximal and distal ends;

distal attachment means for attaching to the tibia, the distal attachment means interconnected with the distal end of the alignment means;

fixation means for attachment to the proximal tibia, the fixation means interconnected with the proximal end of the alignment means for aligning the alignment means;

cutting guide means interconnected with the alignment means, the cutting guide means comprising cutting guides positionable in opposing relation along sides of the tibia, the cutting guides including cutting guide surfaces and fixation means for affixing the opposing cutting guides to opposing sides of the tibia; and

milling means for cutting the tibia, the milling means coacting with the cutting guide surfaces of the cutting guide means for resecting the tibia.

9. The apparatus of claim 8 wherein the guide surfaces of the cutting guides are located within cutting guide slots formed in the cutting guides, the cutting guide slots receiving and guiding the milling means for resecting the tibia.

10. The apparatus of claim 9 wherein the guide surfaces of the cutting guide slots define a linear cutting path.

11. The apparatus of claim 8 wherein cutting guides have corresponding cutting guide slots therein for receiving and guiding the milling means for resecting the tibia.

12. The apparatus of claim 11 wherein the cutting guide slots further include an entrance area for receiving the milling means comprising an enlarged slot area at an end of the guide slots.

13. The apparatus of claim 11 wherein the cutting guide slots further include an entrance area for receiving the milling means comprising an upturned slot area at an end of the guide slots.

14. The apparatus of claim 11 wherein the cutting guide means further comprise hand grips, mating cross bars having pivot apertures and clamp members, the cutting guide means adjustably interconnected with the clamp members.

15. The apparatus of claim 14 further including cutting guide linkage means for interconnecting the cutting guide means with the alignment means, the cutting guide linkage means comprising an aperture for receiving the alignment rod and a post for inserting through the pivot apertures of the mating cross bars of the cutting guide means.

16. A method for resecting a proximal tibia comprising the steps of:

interconnecting an alignment rod with the tibia at proximal and distal ends of the tibia;

interconnecting cutting guide means with the alignment rod;

positioning the cutting guide means in opposing relation along sides of the proximal tibia;

securing the cutting guide means to opposing sides of the tibia;

cutting the proximal tibia with a milling bit by moving the milling bit along cutting guide surfaces on the cutting guide means.

17. The method of claim 16 wherein the step of positioning the cutting guide means in opposing relation across the proximal tibia comprises manipulating hand grips interconnected with the cutting guide means to move the cutting guide means against the proximal tibia.

18. The method of claim 17 wherein the step of positioning the cutting guide means in opposing relation across the proximal tibia further includes the step of adjusting the cutting guide means with respect to the hand grips.

19. The method of claim 18 wherein the step of cutting the proximal tibia with a milling bit comprises the steps of:

inserting the milling bit into guide slots formed in the cutting guide means;

engaging the milling bit with drive means;

capturing ends of the milling bit with handle means; and

guiding the milling bit through the guide slots in the cutting guide means to resect the proximal tibia.