Bone joining apparatus and method

Patent metadata

Field	Value
Publication number	US-10357299-B2
Application number	US-201715632714-A
Country	US
Kind code	B2
Filing date	Jun 26, 2017
Priority date	Feb 19, 2009
Publication date	Jul 23, 2019
Grant date	Jul 23, 2019

Abstract

Provided is a bone joining device suitable for joining a first bone piece to a second bone piece. Also provided is a method of joining a first bone piece with a second bone piece in a living mammal. The method comprises inserting the above bone joining device between the first bone piece and the second bone piece.

First claim

What is claimed is:

1. A bone joining device configured for joining a first bone piece to a second bone piece, the device comprising:
a first component comprising a wall portion, a first cavity defined in part by an interior surface of the wall portion, a first indentation extending into an exterior surface of the wall portion, at least one aperture extending through the wall portion from within the first indentation and to the first cavity, and a first stem portion for insertion into the first bone piece;
a second component comprising a second stem portion for insertion into the second bone piece and an axially extending connector portion extending from the second stem portion and configured to be positioned within the first cavity, the connector portion including a plurality of second indentations extending into an outer surface thereof that are arranged along an axis of the connector portion; and
a coupling member including at least one projection, the coupling member being positioned within the first indentation of the first component and extending through the at least one aperture such that the at least one projection is at least partially positioned within the first cavity,
wherein, in a first orientation of the first and second components, the at least one projection is positioned at least partially within at least one second indentation of the connector portion to removably couple the first and second components.

2. The device of claim 1 , wherein, in the first orientation, the connector portion is prevented from axially translating out of the first cavity.

3. The device of claim 1 , wherein, in the first orientation, rotation of the connector portion about its axis is limited by the at least one projection being positioned at least partially within the at least one second indentation.

4. The device of claim 1 , wherein, in a second orientation of the first and second components, the at least one projection is partially retracted from the first cavity and abuts the outer surface of the connector portion.

5. The device of claim 4 , wherein the coupling member is in a contracted state in the first orientation as compared to the second orientation.

6. The device of claim 4 , wherein, in the second orientation, the connector portion is free to at least one of rotate about its axis and axially translate out of the first cavity.

7. The device of claim 4 , wherein the first and second orientations are at least one of differing axial and differing rotational orientations of the first and second components.

8. The device of claim 1 , wherein the at least one second indentation includes a distal edge that extends substantially perpendicular from the outer surface of the connector portion or is sloped at an acute angle from the outer surface of the connector portion to substantially prevent the connector portion from translating axially out of the first cavity in a proximal direction when in the first orientation.

9. The device of claim 8 , wherein the at least one second indentation includes a proximal edge that is sloped from the outer surface of the connector portion to force the at least one projection positioned within the at least one second indentation out of the at least one second indentation and onto the outer surface of the connector portion as the connector portion is axially translated from the first orientation further into the first cavity to the second orientation.

10. The device of claim 1 , wherein each of the first stem portion and the second stem portion are externally threaded.

11. A bone coupling device for coupling a first bone piece to a second bone piece, the device comprising:
a first component comprising a wall portion, a first cavity defined in part by an interior surface of the wall portion, a first indentation extending into an exterior surface of the wall portion, at least one aperture extending through the wall portion from within the first indentation and to the first cavity, and a first stem portion for coupling with the first bone piece;
a second component comprising a second stem portion for coupling with the second bone piece and an axially extending connector portion extending from the second stem portion configured to be positioned within the first cavity, the connector portion including a plurality of second indentations extending into an outer surface thereof that are arranged along an axis of the connector portion; and
a coupling member including at least one projection, the coupling member being positioned within the first indentation of the first component and extending through the at least one aperture such that the at least one projection is at least partially positioned within the first cavity,
wherein, in a first orientation of the first and second components, the at least one projection is partially retracted from the first cavity and abuts the outer surface of the connector portion, and
wherein, in a second orientation of the first and second components, the coupling member portion is in a contracted state as compared to the first orientation such that the least one projection is positioned within at least one second indentation of the connector portion to removably couple the first and second components.

12. The device of claim 11 , wherein the connector portion includes two sets of a plurality of axially disposed second indentations along differing sides of the connector portion, wherein the coupling member includes two projections, and wherein the first indentation of the first component includes two apertures extending to the first cavity such that the two projections are at least partially positioned within the first cavity.

13. The device of claim 11 , wherein the first and second orientations are at least one of differing axial and differing rotational orientations of the first and second components.

14. The device of claim 11 , wherein the at least one second indentation includes a distal edge that extends substantially perpendicular from the outer surface of the connector portion or is sloped at an acute angle from the outer surface of the connector portion to substantially prevent the connector portion from translating axially in a proximal direction when in the second orientation.

15. The device of claim 11 , wherein the at least one second indentation includes a proximal edge that is sloped from the outer surface of the connector portion to force the at least one projection positioned within the at least one second indentation out of the at least one second indentation and onto the outer surface of the connector portion as the connector portion is axially translated from the first orientation further into the first cavity to the second orientation.

16. The device of claim 11 , wherein, in the second orientation, the least one projection prevents the connector portion from translating axially out from the first cavity along a first axial direction.

17. The device of claim 16 , wherein, in the first and second orientations, the connector portion of the second component is translatable in a second axial direction that opposes the first axial direction to allow the connector portion to axially advance into the first cavity.

18. The device of claim 11 , wherein the first cavity and the outer surface of the connector portion are substantially cylindrical.

19. The device of claim 11 , wherein coupling member is a knobbed c-ring that extends about a portion of the outer surface of the connector portion and within the first indentation, and wherein the knobbed c-ring is oriented substantially per

Assignees

• Nextremity Solutions Inc

Inventors

• Weiner Lon S
• Katchis Stuart D
• Alfaro Arthur A
• Van Iperen Willem H P
• Truman Mari S

Classifications

• A61F2002/30873

  Threadings machined on non-cylindrical external surfaces · CPC title

• A61F2002/3055

  for adjusting length · CPC title

• A61F2002/4228

  for interphalangeal joints, i.e. IP joints · CPC title

• A61F2002/4233

  for metatarso-phalangeal joints, i.e. MTP joints · CPC title

• A61F2002/30495

  using a locking ring · CPC title