Interbody spacer

Patent metadata

Field	Value
Publication number	US-9358122-B2
Application number	US-201213346179-A
Country	US
Kind code	B2
Filing date	Jan 9, 2012
Priority date	Jan 7, 2011
Publication date	Jun 7, 2016
Grant date	Jun 7, 2016

Abstract

An interbody spacer includes a connecting portion and a pair of leg portions extending from the connecting portion. The connecting portion and the pair of leg portions define top and bottom surfaces configured and adapted to engage first and second vertebral bodies, respectively, and inner and outer sidewalls extending between the top and bottom surfaces. In particular, the top and bottom surfaces of the leg portions include first projections defining a first angle with the respective top and bottom surfaces of the leg portions. The top and bottom surfaces of the connecting portion include second projections defining a second angle with the respective top and bottom surfaces of the connecting portion. The first and second angles are different.

First claim

What is claimed is:

1. An interbody spacer comprising:
a connecting portion;
a pair of leg portions extending from the connecting portion, the connecting portion and the pair of leg portions defining top and bottom surfaces configured and adapted to engage first and second vertebral bodies, respectively, and inner and outer sidewalls extending between the top and bottom surfaces, wherein the top and bottom surfaces of the leg portions include first projections defining a first angle with the respective top and bottom surfaces of the leg portions, and the top and bottom surfaces of the connecting portion include second projections defining a second angle with the respective top and bottom surfaces of the connecting portion, the first and second angles being different, wherein the outer sidewall includes third projections configured to engage with a contact support of a surgical tool, the third projections located on an outer surface of the outer sidewall; and
a pair of apertures located on a proximal portion of the connecting portion and extending therethrough, the pair of apertures separated by a dividing wall that defines a recess, the recess located on the connecting portion and laterally spaced from outer surfaces of the pair of legs, the pair of apertures dimensioned such that the dividing wall may be grasped by a surgical tool, wherein each aperture of the pair of apertures is adjacent to and in communication with the other aperture of the pair of apertures, and the inner and outer sidewalls have an arcuate profile.

2. The interbody spacer according to claim 1 , wherein the first angle is less than the second angle.

3. The interbody spacer according to claim 1 , wherein the top and bottom surfaces further include fourth projections disposed between the first and second projections, the fourth projections each having a first side defining an angle with respective top and bottom surfaces that is substantially identical to the first angle and a second side defining an angle with respective top and bottom surfaces that is substantially identical to the second angle.

4. The interbody spacer according to claim 1 , wherein the first projections are uniformly spaced apart.

5. The interbody spacer according to claim 1 , wherein the second projections are uniformly spaced apart.

6. The interbody spacer according to claim 1 , wherein the first and second projections are symmetrically arranged on the top and bottom surfaces.

7. The interbody spacer according to claim 1 , wherein the interbody spacer has a substantially U-shaped configuration.

8. The interbody spacer according to claim 1 , wherein the pair of leg portions define a gap therebetween.

9. The interbody spacer according to claim 8 , wherein the leg portions each define at least one bore extending between the inner sidewall and the outer sidewall.

10. The interbody spacer according to claim 9 , wherein the at least one bore is in communication with the gap.

11. The interbody spacer according to claim 1 , wherein the pair of apertures are in communication with the gap.

12. The interbody spacer according to claim 1 , wherein the third projections are adjacent to at least one of the pair of apertures defined in the outer sidewall.

13. The interbody spacer according to claim 1 , wherein each of the third projections defines an angle with respect to the outer sidewall.

14. The interbody spacer according to claim 1 , wherein first and second fingers of a surgical tool are laterally spaced from outer edges of the leg portions with the first and second fingers positioned in the recess.

15. The interbody spacer according to claim 1 , wherein one aperture of the pair of apertures is adjacent the other aperture of the pair of apertures.

16. The interbody spacer according to claim 1 , wherein the recess is in communication with a space defined between the pair of legs.

17. An interbody spacer comprising:
a connecting portion;
first and second leg portions extending from the connecting portion;
top and bottom surfaces defined by the first leg, the second leg, and the connecting portion, the top and bottom surfaces configured to engage first and second vertebral bodies;
first projections disposed on top and bottom surfaces of the leg portions and defining a first angle with the respective top and bottom surfaces of the first and second leg portions;
second projections located on the connecting portion and defining a second angle with the respective top and bottom surfaces of the connecting portion, the second angle being different from first angle;
third projections positioned on outer surfaces of the first and second leg portions;
first and second apertures located on the connecting portion and extending therethrough, the first aperture being adjacent to the second aperture, the first and second apertures being laterally spaced from the outer surfaces of the first and second leg portions;
a space defined between first and second leg portions, the first and second apertures in communication with the space, the connecting portion, and each other; and
a recess defined by the first aperture, the second aperture, and a dividing wall, the dividing wall separating the first aperture from the second aperture, the recess laterally spaced from outer surfaces of the first and second legs.

18. The interbody spacer of claim 17 , wherein the recess is configured to receive first and second fingers of a surgical tool such that the first and second fingers are laterally spaced from the outer surfaces of the first and second leg portions.

Assignees

• Soo Teck
• K2M Inc

Inventors

• Soo Teck

Classifications

• A61F2002/30593

  hollow · CPC title

• A61F2002/30892

  parallel · CPC title

• A61F2/4455 Primary

  for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages (intervertebral discs A61F2/442) · CPC title

• A61F2/4465

  having a circular or kidney shaped cross-section substantially perpendicular to the axis of the spine · CPC title

• A61F2310/00029

  Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium · CPC title