Spinal implant

Patent metadata

Field	Value
Publication number	US-11638651-B2
Application number	US-202016850195-A
Country	US
Kind code	B2
Filing date	Apr 16, 2020
Priority date	Jan 27, 2015
Publication date	May 2, 2023
Grant date	May 2, 2023

Abstract

A spinal implant is provided and includes a body portion defining a longitudinal axis. The body portion includes a distal end portion, a proximal end portion, opposed side surfaces that extend between the distal and proximal end portions, and top and bottom surfaces configured and adapted to engage vertebral bodies. The top and bottom surfaces have a surface roughness between 3-4 μm. A cavity extends through the top and bottom surfaces defining a surface area that is at least 25% of a surface area of the top surface or the bottom surface. First orifices are defined through the top surface and second orifices are defined through the bottom surface. The second orifices are connected to the first orifices by a plurality of channel.

First claim

The invention claimed is:

1. A spinal implant comprising:
a body portion defining a longitudinal axis, the body portion including a distal end portion, a proximal end portion, opposed side surfaces that extend from the distal end portion to the proximal end portion, and top and bottom surfaces configured and adapted to engage vertebral bodies;
the top and bottom surfaces include engagement features configured to engage vertebral bodies adjacent the spinal implant to permit the spinal implant to move in one direction and prevent the spinal implant from moving in an opposite direction;
first orifices defined through the top surface, each orifice of the first orifices defining a respective centerline therethrough;
second orifices defined through the bottom surface each orifice of the second orifices defining a respective centerline therethrough, the second orifices connected to the first orifices by a plurality of first channels, the first channels defining a plurality of first channel rows;
wherein a first plurality of enlarged orifices is defined through the top and bottom surfaces to form a plurality of second channels, the second channels defining a plurality of second channel rows, each second channel row being interposed between first channel rows.

2. The spinal implant of claim 1 , further comprising third orifices defined through at least one of the opposed side surfaces, the third orifices defining respective centerlines therethrough, wherein the centerlines of the third orifices extend through the plurality of first channels.

3. The spinal implant of claim 2 , further comprising fourth orifices extending from one opposed side surface to the other opposed side surface, the fourth orifices defining respective centerlines therethrough, wherein the centerlines of the fourth orifices extend between the plurality of first channels.

4. The spinal implant of claim 1 , further comprising a cavity extending through the top and bottom surfaces, the cavity defining a surface area that is at least 25% of a surface area of the top surface or the bottom surface.

5. The spinal implant of claim 1 , wherein the top and bottom surfaces have a surface roughness between 3-4 μm.

6. The spinal implant of claim 1 , wherein the distal end portion includes an engagement opening that is configured to be releasably engaged with a surgical instrument.

7. The spinal implant of claim 6 , wherein the body defines a lateral window that passes through each of the side surfaces.

8. The spinal implant of claim 7 , wherein the lateral window has a height equal to the diameter of the engagement opening, and wherein the lateral window is vertically aligned with the engagement opening.

9. A spinal implant comprising:
a body portion defining a longitudinal axis, the body portion including a distal end portion, a proximal end portion, opposed side surfaces that extend from the distal end portion to the proximal end portion, and top and bottom surfaces configured and adapted to engage vertebral bodies;
first orifices defined through the top surface, each orifice of the first orifices defining a respective centerline therethrough;
second orifices defined through the bottom surface each orifice of the second orifices defining a respective centerline therethrough, the second orifices connected to the first orifices by a plurality of first channels, the first channels defining a plurality of first channel rows;
third orifices defined through at least one of the opposed side surfaces, the third orifices defining respective centerlines therethrough, wherein the centerlines of the third orifices extend through the plurality of first channels, and
fourth orifices extending from one opposed side surface to the other opposed side surface, the fourth orifices defining respective centerlines therethrough, wherein the centerlines of the fourth orifices extend between the plurality of first channels,
wherein a first plurality of enlarged orifices is defined through the top and bottom surfaces to form a plurality of second channels, the second channels defining a plurality of second channel rows, each second channel row being interposed between first channel rows.

10. The spinal implant of claim 9 , wherein a second plurality of enlarged orifices is defined through the other of the top or bottom surfaces.

11. The spinal implant of claim 10 , wherein an enlarged orifice of the second plurality of enlarged orifices includes a diameter that is different than a diameter of an enlarged orifice of the first plurality of enlarged orifices.

12. The spinal implant of claim 11 , wherein an enlarged orifice of the first plurality of enlarged orifices or an enlarged orifice of the second plurality of enlarged orifices includes a circular cross-section.

13. The spinal implant of claim 12 , wherein an enlarged orifice of the first plurality of enlarged orifices includes a diamond-shaped cross-section.

14. The spinal implant of claim 12 , wherein an enlarged orifice of the second plurality of enlarged orifices includes a diamond-shaped cross-section.

15. The spinal implant of claim 12 , wherein each enlarged orifice of the first and second pluralities of enlarged orifices includes a diamond-shaped cross-section.

16. The spinal implant of claim 9 , wherein one of the third orifices includes a cross-section different than one of the first orifices or one of the second orifices.

17. The spinal implant of claim 9 , wherein opposed openings of one of the third orifices are offset with respect to each other.

18. The spinal implant of claim 17 , wherein a third plurality of enlarged orifices is defined through one of the opposed side surfaces.

19. The spinal implant of claim 18 , wherein one enlarged orifice of the third plurality of enlarged orifices includes a diamond-shaped cross-section.

20. The spinal implant of claim 9 , wherein one of the third orifices includes a diamond-shaped cross-section.

Assignees

• K2M Inc

Inventors

• Wilson Lester
• Morrison Thomas
• Noordeen Hilali
• Moore Jennifer
• Boyd Clint

Classifications

• A61F2/44 Primary

  for the spine, e.g. vertebrae, spinal discs · CPC title

• A61F2/4465

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

• A61F2002/3092

  having an open-celled or open-pored structure · CPC title

• A61F2/447

  substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section · CPC title

• A61F2002/30593

  hollow · CPC title