Bone graft cage

Patent metadata

Field	Value
Publication number	US-12329643-B2
Application number	US-202117303393-A
Country	US
Kind code	B2
Filing date	May 27, 2021
Priority date	Jun 13, 2016
Publication date	Jun 17, 2025
Grant date	Jun 17, 2025

Abstract

A device for containing bone graft material includes an outer sleeve including a first proximal longitudinal split extending along a length thereof and a first distal longitudinal split extending along a length thereof and an inner sleeve connected to the outer sleeve via at least one strut so that a bone graft collecting space is defined therebetween, the inner sleeve including a second distal longitudinal split extending along a length thereof in combination with an interstitial mesh extending circumferentially between the inner and outer sleeves to hold graft material in the bone graft collecting space, the interstitial mesh including a third longitudinal split extending along a length thereof so that a distal side of the device may be spread open to open the distal longitudinal slot from the outer sleeve, through the interstitial mesh and the inner sleeve to a space radially within the inner sleeve.

First claim

What is claimed is:

1. A device for containing bone graft material, comprising:
an outer sleeve extending longitudinally from a first end to a second end and sized and shaped to correspond to a profile of an outer surface of a target bone, the outer sleeve including a first proximal longitudinal split extending along an entire length of the outer sleeve; and
an inner sleeve connected to the outer sleeve to define a bone graft holding space between the inner and outer sleeves, the inner sleeve sized and shaped to correspond to a profile of a medullary canal of the target bone, the device including a distal longitudinal split opening through the inner and outer sleeves to an interior of a circumference of the inner sleeve.

2. The device of claim 1 , wherein the inner sleeve is connected to the outer sleeve via a plurality of first struts extending from the inner sleeve to the outer sleeve on a first side of the distal longitudinal split and a plurality of second struts extending from the inner sleeve to the outer sleeve on a second side of the distal longitudinal split opposite the first side of the distal longitudinal split.

3. The device of claim 1 , wherein the inner sleeve includes a second proximal longitudinal split extending along at least a portion of a length thereof substantially opposite the distal longitudinal split to facilitate opening of the distal longitudinal split.

4. The device of claim 1 , wherein the inner sleeve is connected to the outer sleeve only at the distal longitudinal split.

5. The device of claim 1 , further comprising an interstitial structure including a plurality of spacing members, each of the spacing members coupled to one of the inner and outer sleeves toward the other of the inner and outer sleeves to maintain a desired spacing between the inner and outer sleeves, the spacing members being spaced from one another circumferentially around at least a portion of the inner sleeve and longitudinally along at least a portion of the length of the device to control a size of the bone graft holding space.

6. The device of claim 5 , wherein the interstitial structure forms a plurality of shelves separated from one another along the length of the device to divide the bone graft holding space into a plurality of longitudinally separated graft holding spaces.

7. The device of claim 2 , wherein each of the first struts is connected to a first portion of the outer sleeve via a corresponding first living hinge and each of the second struts is connected to a second portion of the outer sleeve via a corresponding second living hinge permitting the first and second portions of the outer sleeve to be rotated relative to the first and second struts to open the bone graft holding space for the insertion of bone graft material into the bone graft holding space.

8. The device of claim 7 , wherein rotation of the first and second portions of the outer sleeve away from one another opens the device into a substantially W shape with the bone graft holding space open to a proximal side of the device.

9. The device of claim 1 , wherein a connection between the inner sleeve and the outer sleeve is configured to permit the outer sleeve to float relative to the inner sleeve so that the outer sleeve can remain in position as desired around a target portion of bone even when an intramedullary nail received within the inner sleeve is not centered relative to the target portion of bone.

10. The device of claim 1 , wherein the inner sleeve further includes at least one second living hinge formed substantially diametrically opposite the distal longitudinal split to facilitate opening of the distal longitudinal split so that the device is configured to be inserted to a target position over a previously implanted intramedullary implant.

11. The device of claim 1 , wherein the outer sleeve is formed as a plurality of circumferential and longitudinal members intersecting to define openings of a predetermined size selected to retain bone graft material within the bone graft holding space.

12. The device of claim 11 , wherein the inner sleeve is formed as a plurality of circumferential and longitudinal members intersecting to define openings of a predetermined size selected to retain bone graft material within the bone graft holding space.

13. The device of claim 11 , wherein longitudinally adjacent ones of the openings of the outer sleeve are offset relative to one another relative to a longitudinal axis of the device.

14. The device of claim 13 , wherein longitudinally adjacent ones of the openings of the inner sleeve are offset relative to one another relative to a longitudinal axis of the device.

15. The device of claim 1 , further comprising a tag releasably attached to a proximal side of the device, a shape of the tag indicating a desired implantation orientation of the device.

16. A graft containment device for treating bone, comprising:
a radially inner sleeve dimensioned and shaped to substantially match dimensions of a medullary canal of a portion of bone to be treated; and
an outer sleeve extending circumferentially outside and around the inner sleeve to define a bone graft holding space between the inner and outer sleeves, the outer sleeve including a proximal longitudinal split along an entire length of the outer sleeve, the device including a distal longitudinal split opening from an exterior of the outer sleeve to a space within the inner sleeve so that the device is configured to be inserted to a target position in which a previously implanted intramedullary implant is received within the space within the inner sleeve while the outer sleeve extends around a space conforming to an outer surface of a portion of bone to be replaced.

17. The device of claim 16 , wherein the outer sleeve is coupled to the inner sleeve so that the outer sleeve is configured to be spread open at the proximal longitudinal split for the insertion of bone graft material into the bone graft holding space and the outer sleeve may then be closed around the bone graft material to retain the bone graft material within the bone graft holding space.

18. The device of claim 17 , further comprising a plurality of first struts and a plurality of second struts coupling the inner sleeve to the outer sleeve to define the bone graft holding space, a portion of the circumferences of the inner and outer sleeves being disconnected from one another and the first struts being immediately adjacent a first side of the distal longitudinal split while the second struts are separated from the first struts about a circumference of the device by a width of the distal longitudinal split so that the outer sleeve is configured to be spread apart at the first proximal longitudinal split.

19. The device of claim 16 , further comprising an interstitial structure including a plurality of spacing members extending between the inner and outer sleeves and being spaced from one another longitudinally along at least a portion of a length of the device, each of the spacing members being coupled to only one of the inner and outer sleeves.

20. The device of claim 16 , wherein the proximal longitudinal split is on a side of the device opposite the distal longitudinal split.

Assignees

• Depuy Synthes Products Inc

Inventors

• Larsen Scott
• Hamel Ross
• Pierson Glen
• Mikhail George

Classifications

• A61F2002/30914

  Details of the mesh structure, e.g. disposition of the woven warp and weft wires · CPC title

• A61F2002/3071

  Identification means; Administration of patients · CPC title

• A61F2002/30177

  W-shaped, M-shaped or sigma shaped · CPC title

• A61F2/4601

  for introducing bone substitute, for implanting bone graft implants or for compacting them in the bone cavity · CPC title

• A61F2002/30235

  tubular, e.g. sleeves · CPC title