HAMMER TOE IMPLANT AND METHOD

• US 20110301652A1
• Filed: 04/13/2011
• Published: 12/08/2011
• Est. Priority Date: 06/02/2010
• Status: Active Grant

• Current Assignee: Wright Medical Technology Incorporated (Stryker Corporation)
• Original Assignee: Wright Medical Technology Incorporated (Stryker Corporation)
• Inventors: Reed, Wesley, Koka, Dinesh V.
• Granted Patent: US 9,072,564 B2
• Time in Patent Office: Days
• US Class Current: 606/319
• CPC Class Codes: A61B 17/7291 for small bones, e.g. in the foot, ankle, hand or wrist
• CPC Class Codes: A61B 17/862 at the periphery of the screw head
• CPC Class Codes: A61B 17/8883 the driver bit acting on the periphery of the screw head
• CPC Class Codes: A61B 17/8891 at its periphery
• CPC Class Codes: A61F 2/4225 for feet, e.g. toes
• CPC Class Codes: A61F 2002/30622 Implant for fusing a joint or bone material
• CPC Class Codes: A61F 2002/4228 for interphalangeal joints, i.e. IP joints
• CPC Class Codes: A61F 2002/4233 for metatarso-phalangeal joints, i.e. MTP joints

Abstract

An implant is disclosed including an elongate threaded portion and a blade portion extending from the elongate threaded portion. The blade portion has a taper terminating at a point.

Claims

1. An implant, comprising:

an elongate threaded portion; and

a blade portion extending from the elongate threaded portion, the blade portion having a taper terminating at a point.

2. The implant of claim 1, wherein the blade portion includes a plurality of serrated edges.

3. The implant of claim 1, wherein the blade portion tapers along its width and thickness to the point.

4. The implant of claim 1, further comprising an engagement portion disposed between the threaded portion and the blade portion, the engagement portion including a projection extending in a direction away from an axis defined by the elongate threaded portion.

5. The implant of claim 4, wherein the direction is approximately perpendicular to the axis defined by the threaded portion.

6. The implant of claim 1, further comprising an engagement portion disposed between the threaded portion and the blade portion, the engagement portion including a pair of projections extending in opposite directions from an axis defined by the elongate threaded portion.

7. The implant of claim 1, wherein the blade portion extends from the elongate threaded member at angle with respect to an axis defined by the elongate threaded member.

8. The implant of claim 7, wherein the angle is between zero and 45 degrees.

9. A method, comprising:

forming an incision to gain access to a joint between first and second bones;

flexing the first and second bones such that the bones are disposed at an angle from one another;

advancing a threaded portion of an implant into the first bone, the implant including a blade portion extending from the elongate threaded portion;

repositioning the second bone such that a middle of the second bone is approximately aligned with the blade portion of the implant; and

forcing the second bone into engagement with the blade portion of the implant.

10. The method of claim 9, further comprising:

pre-drilling or broaching the second bone prior to forcing the second bone into engagement with the blade portion of the implant.

11. The method of claim 9, further comprising:

resecting an end of each the first and second bones prior to advancing the elongate threaded portion of the implant into the first bone.

12. The method of claim 9, wherein the first bone is one of a proximal phalanx or a middle phalanx of a foot, and the second bone is the other of the proximal phalanx or the middle phalanx of a foot.

13. The method of claim 9, wherein the blade portion of the implant extends from the elongate threaded member at angle with respect to an axis defined by the elongate threaded member.

14. The method of claim 9, wherein the implant includes an engagement portion disposed between the threaded portion and the blade portion, the engagement portion including a projection extending from an axis defined by the elongate threaded portion.

15. A surgical assembly, comprising:

an implant including;

a threaded ended, and

a blade end extending from the threaded end, the blade end tapering along its thickness and its width to a point and including a plurality of serrated edges; and

a driving assembly including;

a handle,

a driving rod extending from the handle, and

an adapter coupled to an end of the driving rod, the adapter having a body defining a slot at one end that is sized and configured to receive the blade end of the implant.

16. The surgical assembly of claim 15, wherein the blade end extends from the threaded end in a direction that is disposed at an angle with respect to an axis defined by the threaded end.

17. The surgical assembly of claim 15, wherein the adapter body defines a circumferential groove sized and configured to receive an o-ring for coupling the implant to the adapter.

18. The surgical assembly of claim 15, wherein the o-ring is disposed within a valley of at least one of the serrated edges of the implant when the implant is disposed within the slot defined by the adapter.

19. The surgical assembly of claim 15, wherein the implant includes an engagement portion disposed between the threaded portion and the blade portion, the engagement portion including a projection extending in a direction away from an axis defined by the elongate threaded portion.

20. The surgical assembly of claim 19, wherein the engagement portion includes a pair of projections radially extending in opposite directions from one another.