ORTHOPEDIC IMPLANT AUGMENTS

• US 20190321195A1
• Filed: 07/02/2019
• Published: 10/24/2019
• 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.
• Granted Patent: US 11,344,432 B2
• Time in Patent Office: 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 for providing orthopedic implant augments are provided which have 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 acetabular system comprising:

an implant including an exterior surface; and

an augment including;

a mating surface adapted and configured to contact the exterior surface of the implant during use;

a first surface intersecting the mating surface along a first edge;

a second surface intersecting the mating surface along a second edge; and

a plurality of openings extending from the first surface to the second surface, at least one of the openings including a plurality of fins extending inwardly from an inner surface of the opening, the plurality of fins being adapted and configured to selectively secure a position of a fastener inserted therein along any one of a variety of angles for securing the augment to a patient'"'"'s bone during use;

wherein the plurality of fins are arranged and configured in a plane, the plane being non-parallel to the mating surface.

2. The system of claim 1, wherein the plane of the fins is substantially perpendicular to the mating face.

3. The system of claim 1, wherein the augment includes a generally horseshoe shape including a body portion and first and second legs extending from opposite ends of the body portion.

4. The system of claim 1, wherein the implant is selected from one of an acetabular shell or an acetabular cage.

5. The system of claim 1, wherein each of the plurality of openings includes a first end associated with the first surface of the augment and a second end associated with the second surface of the augment, the plurality of openings being adapted and configured to selectively receive a fastener inserted into either of the first end or the second end.

6. The system of claim 5, wherein the fastener is inserted into the first end when the augment is positioned in a first orientation relative to the implant, and the fastener is inserted into the second end when the augment is positioned in a second orientation.

7. The system of claim 6, wherein the mating face of the augment is configured to mate with the implant in each of the first and second orientations.

8. The system of claim 7, wherein the augment further comprises a bone contacting surface, the bone contacting surface configured to mate with the patient'"'"'s bone or tissue in each of the first and second orientations.

9. The system of claim 1, wherein the plurality of fins and the opening are adapted and configured to enable longitudinal movement of a fastener within the opening.

10. The system of claim 1, wherein the opening includes a width, the width of the opening and a space between the plurality of fins being adapted and configured to allow for movement of the fastener so that an axis of the fastener is offset from the central axis of the opening.

11. The system of claim 1, wherein the mating surface of the augment includes an arcuate, contoured shape and the exterior surface of the implant includes an outer curved surface.

12. The system of claim 11, wherein the augment further comprises 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 arcuate, contoured shape being different than the second contoured shape.

13. The system of claim 12, wherein the bone interface surface is arranged and configured to be non-parallel to the plane of the plurality of fins.

14. The system of claim 1, wherein at least a portion of the mating face is formed from a porous material.

15. An orthopedic augment adapted and configured to contact with an exterior surface of an acetabular cage or system during use, the augment comprising:

a mating surface adapted and configured to contact the exterior surface of the acetabular cage or system;

a first surface intersecting the mating surface along a first edge;

a second surface intersecting the mating surface along a second edge; and

a plurality of openings extending from the first surface to the second surface, the openings including a plurality of fins extending inwardly from an inner surface of the opening, the plurality of fins being adapted and configured to selectively secure a position of a fastener inserted therein along any one of a variety of angles for securing the augment to a patient during use;

wherein the plurality of fins are arranged and configured in a plane, the plane being non-parallel to the mating surface.

16. The augment of claim 15, wherein the plane of the fins is substantially perpendicular to the mating face.

17. The augment of claim 15, wherein the augment includes a generally horseshoe shape including a body portion and first and second legs extending from opposite ends of the body portion.

18. The augment of claim 15, wherein each of the plurality of openings includes a first end associated with the first surface of the augment and a second end associated with the second surface of the augment, the plurality of openings being adapted and configured to selectively receive a fastener inserted into either of the first end or the second end.

19. The augment of claim 15, wherein the mating surface includes a first contoured shape and the augment further comprises 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.

20. The augment of claim 19, wherein the bone interface surface is arranged and configured to be non-parallel to the plane of the plurality of fins.