Femoral notch preparation guide

Patent metadata

Field	Value
Publication number	US-10952744-B2
Application number	US-201816197559-A
Country	US
Kind code	B2
Filing date	Nov 21, 2018
Priority date	Nov 21, 2017
Publication date	Mar 23, 2021
Grant date	Mar 23, 2021

Abstract

A notch preparation guide for engagement with a femoral trial component according to some embodiments includes an anterior portion having an anterior slot arranged to receive a portion of a first cutting instrument therein, and a posterior portion having a posterior slot arranged to receive a portion of a second cutting instrument therein. The anterior slot and the posterior slot are arranged to capture a portion of a distal femur there between for removal by either the first cutting instrument or the second cutting instrument. In some embodiments, the first cutting instrument is a saw and the second cutting instrument is a chisel. In some embodiments, the notch preparation guide includes a lock adapted to move between an open position wherein the notch preparation guide is detachable from the femoral trial component and a closed position wherein the notch preparation guide is fixedly attached to the femoral trial component.

First claim

What is claimed is:

1. A notch preparation guide for engagement with a femoral trial component, the notch preparation guide comprising:
an anterior portion having an anterior slot arranged to receive a portion of a first cutting instrument therein;
a posterior portion having a posterior slot arranged to receive a portion of a second cutting instrument therein; and
a movable arm pivotally attached to the posterior portion, the moveable arm adapted to move between an open position in which the notch preparation guide is detachable from the femoral trial component and a closed position in which the notch preparation guide is attached to the femoral trial component;
wherein the anterior slot and the posterior slot are arranged to capture a portion of a distal femur therebetween for removal by either of the first cutting instrument or the second cutting instrument.

2. The notch preparation guide of claim 1 , wherein the anterior portion has a first opening at an end of the anterior slot, and wherein the first opening is adapted to receive either the portion of the first cutting instrument or the portion of the second cutting instrument.

3. The notch preparation guide of claim 2 , wherein the anterior portion includes a second opening at an opposite end of the anterior slot, the second opening configured to receive the portion of the first cutting instrument, the anterior slot further arranged such that the first cutting instrument can move from an anterior direction to a posterior direction in the anterior slot.

4. The notch preparation guide of claim 3 , wherein the anterior slot includes an internal feature arranged to guide the portion of the first cutting instrument positioned in the anterior slot.

5. The notch preparation guide of claim 4 , wherein the internal feature has a cylindrical shape and is arranged to restrict vertical movement of the first instrument relative to the anterior slot.

6. The notch preparation guide of claim 4 , wherein the internal feature is arranged to stop movement of the portion of the second cutting instrument through the second opening of the anterior portion when the second cutting instrument is assembled with the posterior slot.

7. The notch preparation guide of claim 1 , wherein the anterior slot is positioned and aligned opposite of the posterior slot to enable movement of the portion of the first cutting instrument through the anterior slot and into the posterior slot.

8. The notch preparation guide of claim 1 , wherein the anterior slot is positioned and aligned opposite of the posterior slot to enable movement of the portion of the second cutting instrument through the posterior slot and into the anterior slot.

9. The notch preparation guide of claim 1 , wherein the posterior portion includes a first opening at an end of the posterior slot, the first opening is adapted to receive the portion of the second cutting instrument.

10. The notch preparation guide of claim 1 , further comprising a pair of flanges configured to slide into a pair of orientation slots formed in the femoral trial component.

11. The notch preparation guide of claim 1 , wherein at least one of the anterior slot or the posterior slot forms a captured guideway.

12. The notch preparation guide of claim 1 , wherein at least one of the anterior slot or the posterior slot is substantially rectangular in cross-sectional shape.

13. The notch preparation guide of claim 1 , wherein the first cutting instrument is a saw, and wherein the second cutting instrument is a chisel.

14. The notch preparation guide of claim 1 , wherein the posterior portion includes one or more windows extending between a distal surface of the posterior portion and a proximal surface of the posterior portion.

15. The notch preparation guide of claim 1 , further comprising a locking mechanism operable to selectively retain the movable arm in the closed position.

16. The notch preparation guide of claim 1 , wherein the movable arm is biased toward the closed position.

17. The notch preparation guide of claim 1 , wherein the movable arm further includes a post operable to be received in a recess of the femoral trial component when the movable arm is in the closed position.

18. The notch preparation guide of claim 1 , wherein the portion of the distal femur comprises a trochlear groove.

19. A method of knee arthroplasty, comprising:
resecting a patient's distal femur with anterior and posterior cuts; positioning a femoral trial component on the distal femur, the femoral trial component having an opening provided between a first condylar component and a second condylar component;
attaching a notch preparation guide in the opening of the femoral trial component, the notch preparation guide having an anterior portion that defines an anterior slot arranged to receive a portion of a first cutting instrument therein, the notch preparation guide having a posterior portion that defines a posterior slot arranged to receive a portion of a second cutting instrument therein; and
preparing the patient's distal femur using either the anterior slot to guide the first cutting instrument or the posterior slot to guide the second cutting instrument.

20. The method of claim 19 , wherein the anterior slot and the posterior slot are arranged to capture a portion of a distal femur there between for removal by either the first cutting instrument or the second cutting instrument.

21. The method of claim 19 , further comprising:
moving the portion of the first cutting instrument in the anterior slot from an anterior direction to a posterior direction.

22. The method of claim 21 , wherein the moving includes oscillating and the first cutting instrument is a saw.

23. The method of claim 21 , further comprising:
moving the portion of the first cutting instrument through the anterior slot and into the posterior slot.

24. The method of claim 23 , further comprising:
moving the portion of the second cutting instrument in the posterior slot from a posterior direction to an anterior direction.

25. The method of claim 23 , wherein the second cutting instrument is a chisel.

26. The method of claim 23 , further comprising:
moving the portion of the second cutting instrument through the posterior slot and into the anterior slot.

27. The method of claim 26 , further comprising:
engaging the portion of the second cutting instrument with an internal feature arranged in the anterior slot to stop movement of the portion of the second cutting instrument through a second opening of the anterior portion.

28. The method of claim 19 , wherein the preparing includes removing at least a portion of a trochlear groove of the distal femur using at least one of the first cutting instrument or the second cutting instrument.

29. A notch preparation guide for engagement with a femoral trial component, the notch preparation guide comprising:
an anterior portion having an anterior slot arranged to receive a portion of a first cutting instrument therein; and
a posterior portion having a posterior slot arranged to receive a portion of a second cutting instrument therein;
wherein:
the anterior slot and the posterior slot are arranged to capture a portion of a distal femur therebetween for removal by either of the first cutting instrument or the second cutting instrument;
the anterior portion includes a first opening

Assignees

• Smith & Nephew Inc

Inventors

• Haddock Sean M
• Jackson Michael

Classifications

• A61B17/1764

  for the knee · CPC title

• A61B17/1604

  Chisels; Rongeurs; Punches; Stamps · CPC title

• A61F2/3859

  Femoral components · CPC title

• A61B17/155 Primary

  Cutting femur · CPC title

• A61B17/1675

  for the knee · CPC title