Prosthetic implant and method of implantation

• US 9,381,085 B2
• Filed: 06/22/2012
• Issued: 07/05/2016
• Est. Priority Date: 06/23/2011
• Status: Active Grant

• Current Assignee: Stryker Corporation
• Original Assignee: Stryker Corporation
• Inventors: Axelson, Stuart L. Jr., Ferko, Michael C., Wellings, Peter John
• Primary Examiner(s): Sweet, Thomas J
• Assistant Examiner(s): Bahena, Christie
• Application Number:
  US13/530,927
• Publication Number:
  US 20120330429A1
• Time in Patent Office: 1,474 Days
• Field of Search: 623/20.14, 623/20.18, 623/20.19, 623/20.21, 623/20.28, 623/20.3, 623/20.31, 606/86, 606/96
• US Class Current: 1/1
• CPC Class Codes: A61B 17/1675 for the knee
• CPC Class Codes: A61B 34/00 Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
• CPC Class Codes: A61F 2/30771 applied in original prostheses, e.g. holes or grooves
• CPC Class Codes: A61F 2/3859 Femoral components
• CPC Class Codes: A61F 2/3877 Patellae or trochleae
• CPC Class Codes: A61F 2/389 Tibial components A61F2/3868 takes precedence
• CPC Class Codes: A61F 2/4081 Glenoid components, e.g. cups
• CPC Class Codes: A61F 2/461 of knees
• CPC Class Codes: A61F 2002/30889 Arcuate pegs
• CPC Class Codes: A61F 2002/30891 Plurality of protrusions
• CPC Class Codes: A61F 2002/3895 unicompartimental

Abstract

A prosthetic implant useful in a cementless application is disclosed. The implant may include a curved bone facing surface and one or more pegs or keels. Preferably, the implant is implanted on a bone surface that has been prepared so as to allow for a snap fit between the implant and the bone.

Claims

1. A prosthetic implant comprising:

a first end having a pivot surface for contacting a prepared bone surface;

a second end;

an articular surface;

a bone contacting surface including a concave portion;

a first peg extending from the concave portion of the bone contacting surface and having a first curved surface; and

a second peg extending from the concave portion of the bone contacting surface and having a second curved surface,

wherein the first and second curved surfaces are concentrically curved about a pivot point located on the first end of the implant.

2. The prosthetic implant of claim 1, further comprising:

a third peg extending from the concave portion of the bone contacting surface and having a third curved surface,

wherein the third curved surface is curved about the pivot point located on the first end of the implant.

3. The prosthetic implant of claim 1, wherein the first and second curved surfaces face the first end.

4. The prosthetic implant of claim 3, further comprising a projection extending from the bone contacting surface, the projection located adjacent the second end.

5. The prosthetic implant of claim 4, wherein the projection is at least partially arcuate.

6. The prosthetic implant of claim 1, wherein the first peg further includes a third curved surface and the second peg further includes a fourth curved surface, the third and fourth curved surfaces being concentrically curved about the pivot point located on the first end of the implant.

7. The prosthetic implant of claim 1, wherein the bone contacting surface includes a flat portion defining a first plane, the pivot point located on the first plane.

8. The prosthetic implant of claim 1, wherein the implant is a femoral component.

9. The prosthetic implant of claim 1, wherein the implant is a tibial component.

10. The prosthetic implant of claim 1, wherein the implant is a patello-femoral component.

11. An prosthetic implant comprising:

a first end having a pivot surface for contacting a prepared bone surface;

a second end;

an articular surface;

a bone contacting surface including a concave portion;

a first peg extending from the concave portion of the bone contacting surface and having a first curved surface having an arcuate longitudinal curvature; and

a second peg extending from the concave portion of the bone contacting surface and having a second curved surface having an arcuate longitudinal curvature,

wherein the first curved surface is curved about a first pivot point and the second curved surface is curved about a second pivot point, the second pivot point being located on the first end of the implant and being at a different location than the first pivot point.

12. The prosthetic implant of claim 11, further comprising:

a third peg extending from the concave portion of the bone contacting surface and having a third curved surface,

wherein the third curved surface is concentrically curved about one of the first or second pivot points.

13. The prosthetic implant of claim 11, wherein the first and second curved surfaces face the first end and the first pivot point is adjacent the first end of the implant.

14. The prosthetic implant of claim 13, further comprising a projection extending from the bone contacting surface, the projection located adjacent the second end.

15. The prosthetic implant of claim 14, wherein the third element is at least partially arcuate.

16. The prosthetic implant of claim 11, wherein the first peg further includes a third curved surface and the second peg further includes a fourth curved surface, the third curved surface being concentrically curved about the first pivot point and the fourth curved surface being concentrically curved about the second pivot point.

17. The prosthetic implant of claim 11, wherein the bone contacting surface includes a flat portion defining a first plane, the first and second pivot points located along the first plane.

18. The prosthetic implant of claim 11, wherein the implant is a femoral component.

19. The prosthetic implant of claim 11, wherein the implant is a tibial component.

20. The prosthetic implant of claim 11, wherein the implant is a patello-femoral component.