Orthopedic implant augments

• US 9,707,097 B2
• Filed: 12/06/2012
• Issued: 07/18/2017
• Est. Priority Date: 12/07/2011
• Status: Active Grant

• Current Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Original Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Inventors: Shea, Jeffrey J., Quinn, Nathaniel M., Goldberg, Daniel R.
• Primary Examiner(s): Hammond, Ellen C
• Application Number:
  US14/363,775
• Publication Number:
  US 20140350559A1
• Time in Patent Office: 1,685 Days
• CPC Class Codes: A61B 17/68 Internal fixation devices , including fasteners and spinal fixators, even if a part thereof projects from the skin bone staples A61B17/0642
• CPC Class Codes: A61B 17/8052 immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded
• CPC Class Codes: A61B 17/8061 specially adapted for particular bones A61B17/70 and A61B17/74 take precedence
• CPC Class Codes: A61B 17/86 Pins or screws or threaded wires; nuts therefor A61B17/72 take precedence
• CPC Class Codes: A61F 2/30734 Modular inserts, sleeves or augments, e.g. placed on proximal part of stem for fixation purposes or wedges for bridging a bone defect
• CPC Class Codes: A61F 2/34 Acetabular cups
• CPC Class Codes: A61F 2/46 Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
• CPC Class Codes: A61F 2002/30131 horseshoe- or crescent- or C-shaped or U-shaped
• CPC Class Codes: A61F 2002/30433 using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
• CPC Class Codes: A61F 2002/30736 Augments or augmentation pieces, e.g. wedges or blocks for bridging a bone defect

Abstract

Systems, methods, and devices are described for providing orthopedic implant augments having fastener locking mechanisms. The augments include a surface for mating with an implant component and a surface for interfacing with a patient'"'"'s bone. The fastener locking mechanisms are aligned such that the augment may be locked in a variety of orientations while maintaining close contact with both an implant and a patient'"'"'s bone. The alignment of the locking mechanisms provides variability and adjustability to the augment to address a variety of bone anatomies and requirements.

Claims

1. An orthopedic device comprising:

a first surface having a mating face configured to mate with an implant, the mating face having an arcuate contoured shape that mates with an exterior surface of an implant;

a second surface adjacent to the first surface and intersecting the first surface at an edge, the second surface comprising an opening extending through the second surface to an opposite surface, wherein the opening is configured to receive a fastener, said opening comprising a plurality of fins disposed in a plane that is not parallel to the mating face; and

a bone interface surface, the bone interface surface and the mating face positioned on opposite sides of the second surface, and the plane in which the plurality of fins are disposed is not arranged parallel to the bone interface surface; and

wherein at least a portion of the first surface is formed from a porous material; and

wherein the arcuate contoured shape of the mating face extends inwardly in a direction generally toward the bone interface surface.

2. The device of claim 1, wherein the opening is configured as a through hole and the opening comprises a first end in the second surface and a second end in a surface opposite the second surface.

3. The device of claim 2, wherein the opening is configured to receive a fastener inserted into the first end in the second surface when the device is in a first orientation and is configured to receive a fastener inserted into the second end opposite the second surface when the device is in a second orientation.

4. The device of claim 3, wherein the fins are disposed between the first and second ends of the opening.

5. The device of claim 3, wherein the fins are configured to lock a fastener in a first locked configuration when the device is in the first orientation and are configured to lock a fastener in a second locked configuration when the device is in the second orientation.

6. The device of claim 3, wherein the mating face is configured to mate with an implant when the device is in each of the first and second orientations.

7. The device of claim 1, wherein, relative to a direction of the longitudinal axis of the opening, the bone interface surface has a shape that is different than the contoured shape of the mating face.

8. The device of claim 1, wherein the plane is substantially perpendicular to the mating face.

9. The device of claim 1, wherein the fins are configured to engage a fastener inserted along any one of a plurality of axes and lock the fastener in a plurality of locking configurations corresponding to the plurality of axes.

10. An augment device comprising:

an inner surface with a mating face, at least a portion of the inner surface comprising a porous material, the mating face having a first contoured shape that mates with an exterior surface of an implant;

a bone interface surface opposite the mating face, the bone interface surface having a second contoured shape that mates with a patient'"'"'s bone or tissue, the first contoured shape being different than the second contoured shape;

a top surface connected to the inner surface and the bone interface surface, wherein the inner surface, the bone interface surface, and the top surface form two legs having a generally horseshoe shape; and

at least one opening extending from the top surface, the at least one opening including a locking mechanism comprising a plurality of fins, the first contoured shape having an arcuate contour that extends inwardly in a direction generally toward the bone interface surface.

11. The augment device of claim 10, wherein the bone interface surface is not arranged parallel to a plane about which the plurality of fins are disposed.

12. The augment device of claim 10, wherein the orientation of the at least one opening is relative to the mating face.

13. The device of claim 10, wherein the mating face is configured to mate with an implant when the device is in each of the first and second orientations.

14. The device of claim 10, wherein at least one of the bone interface surface and the top surface comprise a porous material portion.

15. The device of claim 10, wherein the plurality of fins are disposed in a plane arranged substantially perpendicular to the mating face.

16. The device of claim 10, wherein the plurality of fins is configured to engage a fastener inserted along any one of a plurality of axes and lock the fastener in a plurality of locking configurations corresponding to the plurality of axes.

17. The device of claim 10, wherein the at least one opening is configured as a through hole and the opening comprises a first end in the top surface and a second end in a surface opposite the top surface.

18. The device of claim 17, wherein the opening is configured to receive a fastener inserted into the first end in the top surface when the device is in a first orientation and is configured to receive a fastener inserted into the second end opposite the top surface when the device is in a second orientation.

19. The device of claim 17, wherein the plurality of fins is disposed between the first and second ends of the opening.

20. The device of claim 17, wherein the plurality of fins is configured to lock a fastener in a first locked configuration when the device is in the first orientation and is configured to lock a fastener in a second locked configuration when the device is in the second orientation.

21. An augment device comprising:

an inner surface with a mating face, at least a portion of the inner surface comprising a porous material, the mating face having a first contoured shape that mates with an exterior surface of an implant;

a bone interface surface opposite the mating face, the bone interface surface having a second contoured shape that mates with a patient'"'"'s bone or tissue, the first contoured shape being different than the second contoured shape;

a top surface connected to the inner surface and the bone interface surface, wherein the inner surface, the bone interface surface, and the top surface form two legs having a generally horseshoe shape; and

at least two openings extending along a longitudinal axis from the top surface, the at least two openings each include a locking mechanism comprising a plurality of fins, the plurality of fins being disposed around an inner perimeter of each opening, the plurality of fins with respect to each opening being disposed within a plane, the plane of each opening having an orientation relative to the mating face, and wherein the first contoured shape having an arcuate contour that extends inwardly into a portion of the second surface in a direction generally toward the bone interface surface.

22. The augment device of claim 21, wherein each of the at least two openings has an orientation relative to the mating face.