IP Library › Granted Patent US 9,943,320
Granted Patent B2
US 9,943,320 · App. 14/300,639 · Granted Apr 17, 2018

Femoral explant device

Inventors: Gregg Klein (Livingston, NJ); Harlan Levine (Tenafly, NJ); Timothy A. Hoeman (Morris Plains, NJ); Ray Zubok (Midland Park, NJ); Robert G. Deluca (Bethlehem, PA); Natalia Fridshtand (Ringwood, NJ); Scott V. Cron (Wayne, NJ)
Assignee: Zimmer, Inc.
A61B17/1675A61B17/155A61B17/1604A61B17/1764A61F2/461A61B2090/034A61F2002/4623A61F2002/4624
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Quick Facts
Patent No.
US 9,943,320
App. No.
14/300,639
Granted
Apr 17, 2018
Kind
B2
Abstract

An apparatus for removal of a femoral implant may include a handle portion and a cutting blade opposite the handle portion. The cutting blade may include a cutting edge, wherein the cutting edge includes a non-linear shape to substantially match at least a portion of a profile of the femoral implant to be removed.

Claims (39)

1. An apparatus for removal of a femoral implant, the apparatus comprising:

a cutting device comprising:

a handle portion, and

a cutting blade opposite the handle portion and including a cutting edge, wherein the cutting edge includes a non-linear shape to substantially match at least a portion of a profile of the femoral implant to be removed, the cutting edge further defining a gap positioned to avoid a feature of the femoral implant; and

a placement guide configured to be placed over the femoral implant and receive the cutting device, the placement guide including an engagement feature sized for engagement with a trochlear gap of the femoral implant, the engagement feature configured to removably couple the placement guide to the femoral implant.

2. The apparatus of claim 1 , wherein the cutting blade includes a plurality of planes, wherein a first plane and a second plane of the plurality of planes intersect at an angle to substantially match an angle of the profile of the femoral implant to be removed.

3. The apparatus of claim 2 , wherein the first plane and the second plane of the plurality of planes have different lengths.

4. The apparatus of claim 1 , including a bolster arranged between the cutting blade and the handle portion, wherein the bolster includes a plurality of guide openings arranged to receive a guiding structure configured to guide the cutting blade into position at the femoral implant.

5. The apparatus of claim 1 , including a bolster that intersects the cutting blade substantially orthogonally, wherein the bolster includes a plurality of guide openings arranged to receive a plurality of K-wires.

6. The apparatus of claim 1 , including a bolster that intersects the cutting blade substantially orthogonally, wherein the bolster includes a plurality of guide openings arranged to receive a plurality of pins positioned to guide the cutting blade into position at an interface of a femoral bone and a femur-contacting surface of the femoral implant.

7. The apparatus of claim 1 , wherein the cutting blade includes a number of planes to match a number of planes of a femur contacting surface of the femoral implant.

8. The apparatus of claim 1 , including a bolster arranged between the cutting blade and the handle portion, wherein the bolster and cutting blade are formed as a single unit connectable to the handle portion.

9. The apparatus of claim 1 , wherein the handle portion includes a head opposite the cutting blade and configured to receive impact force.

10. An apparatus for removal of a femoral implant, the apparatus comprising:

a cutting device comprising:

a handle portion, and

a cutting blade opposite the handle portion and including a cutting edge, wherein the cutting edge includes a non-linear shape to substantially match at least a portion of a profile of the femoral implant to be removed;

a placement guide configured to be placed over the femoral implant and receive the cutting device, the placement guide including an engagement feature sized for engagement with a trochlear gap of the femoral implant, the engagement feature configured to removably couple the placement guide to the femoral implant; and

a bolster arranged between the cutting blade and the handle portion, wherein the bolster and handle portion are formed as a single unit connectable to the cutting blade.

11. The apparatus of claim 10 , wherein the cutting blade includes a plurality of planes, wherein a first plane and a second plane of the plurality of planes intersect at an angle to substantially match an angle of the profile of the femoral implant to be removed.

12. The apparatus of claim 11 , wherein the first plane and the second plane of the plurality of planes have different lengths.

13. The apparatus of claim 10 , wherein the cutting blade includes a number of planes to match a number of planes of a femur contacting surface of the femoral implant.

14. The apparatus of claim 10 , wherein the cutting edge includes a gap, wherein the gap is positioned to avoid a feature of the femoral implant.

15. An apparatus for removal of a femoral implant, the apparatus comprising:

a cutting device comprising:

a handle portion, and

a cutting blade opposite the handle portion and including a cutting edge, wherein the cutting edge includes a non-linear shape to substantially match at least a portion of a profile of the femoral implant to be removed;

a placement guide configured to be placed over the femoral implant receive the cutting device, the placement guide including an engagement feature sized for engagement with a trochlear gap of the femoral implant, the engagement feature configured to removably couple the placement guide to the femoral implant; and

a bolster arranged between the cutting blade and the handle portion, wherein the bolster is connectable to the cutting blade and the handle portion is connectable to the bolster.

16. The apparatus of claim 15 , wherein the cutting blade includes a plurality of planes, wherein a first plane and a second plane of the plurality of planes intersect at an angle to substantially match an angle of the profile of the femoral implant to be removed.

17. The apparatus of claim 16 , wherein the first plane and the second plane of the plurality of planes have different lengths.

18. The apparatus of claim 15 , wherein the cutting blade includes a number of planes to match a number of planes of a femur contacting surface of the femoral implant.

19. The apparatus of claim 15 , wherein the cutting edge includes a gap, wherein the gap is positioned to avoid a feature of the femoral implant.

20. An apparatus for removal of a femoral implant, the apparatus comprising:

a cutting device comprising:

a handle portion, and

a cutting blade opposite the handle portion and including a cutting edge, wherein the cutting edge includes a non-linear shape to substantially match at least a portion of a profile of the femoral implant to be removed; and

a placement guide configured to be placed over the femoral implant and receive the cutting device, the placement guide including an engagement feature sized for engagement with a trochlear gap of the femoral implant, the engagement feature configured to removably couple the placement guide to the femoral implant;

wherein the handle portion includes a head opposite the cutting blade and configured to receive impact force.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 4, 2017
From: KLEIN, GREGG; LEVINE, HARLAN; HOEMAN, TIMOTHY A.; ZUBOK, RAY; DELUCA, ROBERT G.; FRIDSHTAND, NATALIA; CRON, SCOTT V.
To: ZIMMER, INC.
Reel/Frame 041847/0068 →
Continuity (3)
Provisional Application 61834095 · Jun 12, 2013
Provisional Application 61899606 · Nov 4, 2013
Related Publication 20140371750A1 · Dec 18, 2014