Vertebral plate systems and methods of use

Patent metadata

Field	Value
Publication number	US-11285016-B2
Application number	US-201916599736-A
Country	US
Kind code	B2
Filing date	Oct 11, 2019
Priority date	Jan 27, 2015
Publication date	Mar 29, 2022
Grant date	Mar 29, 2022

Abstract

A vertebral plate includes a top and bottom surface, a plurality of orifices defined through at least one of the top and bottom surfaces, and a plurality of bone screw openings defined through the top and bottom surfaces. The plurality of orifices defined through the top surface includes a different cross-section than a plurality of orifices defined through the bottom surface. A vertebral plate system and a method of use are also provided.

First claim

The invention claimed is:

1. A vertebral plate, comprising:
a top surface and a bottom surface;
a plurality of channels each extending between the top and bottom surfaces, each of the channels bounded by a first orifice defined in the top surface and a second orifice defined in the bottom surface, each of the channels comprising a longitudinal axis, wherein a cross-sectional dimension of each channel is constant along its longitudinal axis,
the first orifice having a first cross-sectional shape and defining a first axis through a centerpoint thereof that is normal to the top surface, and the second orifice having a second cross-sectional shape different from the first cross-sectional shape and defining a second axis through a centerpoint thereof that is normal to the bottom surface; and
a plurality of bone screw openings defined through the top and bottom surfaces,
wherein a largest cross-sectional dimension of each channel is smaller than a smallest cross-sectional dimension of each of the bone screw openings, and
wherein the channels outnumber the bone screw openings by more than double.

2. The vertebral plate of claim 1 , further including a lip defined within each bone screw opening of the plurality of bone screw openings, each lip configured to engage a corresponding bone screw to retain the corresponding bone screw therein.

3. The vertebral plate of claim 1 , wherein the top and bottom surfaces include concave curvatures.

4. The vertebral plate of claim 3 , wherein the concave curvatures of the top and bottom surfaces extend in a cephalad/caudal direction.

5. The vertebral plate of claim 3 , wherein the concave curvatures of the top and bottom surfaces extend in a medial/lateral direction.

6. The vertebral plate of claim 3 , wherein the concave curvatures of the top and bottom surfaces extend in both a cephalad/caudal direction and a medial/lateral direction.

7. The vertebral plate of claim 1 , wherein the vertebral plate is formed using an additive manufacturing process.

8. The vertebral plate of claim 7 , wherein the additive manufacturing process comprises Selective Laser Powder Processing.

9. The vertebral plate of claim 1 , wherein each bone screw opening of the plurality of bone screw openings is separate and distinct from the plurality of channels.

10. A vertebral plate system, comprising:
a vertebral plate including:
a top surface and a bottom surface;
a plurality of channels extending between the top and bottom surfaces, each of the channels bounded by a first orifice defined in the top surface and a second orifice defined in the bottom surface,

each of the channels comprising a longitudinal axis, wherein a cross-sectional dimension of each channel is constant along its longitudinal axis,
the first orifice having a non-circular cross-sectional shape and defining a first axis through a centerpoint thereof, and the second orifice having a non-circular cross-sectional shape defining a second axis through a centerpoint thereof, the first and second axes being coaxial with the longitudinal axis of the respective channel, the longitudinal axis of each channel being oriented at an oblique angle relative to the top and bottom surfaces;
a plurality of bone screw openings defined through the top and bottom surfaces; and
a plurality of bone screws each configured to be advanced within one of the plurality of bone screw openings and driven into bone,
wherein there are at least twice as many channels as bone screw openings.

11. The system of claim 10 , wherein each bone screw of the plurality of bone screws is a semi-constrained bone screw.

12. The system of claim 11 , wherein the semi-constrained bone screws each include a shank having a first helical thread disposed thereon and a second helical thread disposed on a head portion thereof.

13. The system of claim 12 , wherein a pitch of the first helical thread is different than a pitch of the second helical thread of each semi-constrained bone screw, such that the first helical thread is configured to thread into vertebral bone whereas the second helical thread is configured to engage a lip disposed within one of the plurality of bone screw openings, thereby retaining each semi-constrained bone screw within the vertebral plate.

14. The vertebral plate system of claim 10 , wherein each bone screw opening of the plurality of bone screw openings is separate and distinct from the plurality of channels.

15. A method of performing spinal surgery, comprising:
inserting a vertebral plate into an incision of a patient, the vertebral plate including:
a top surface and a bottom surface;
a plurality of channels each extending between the top and bottom surfaces and along a longitudinal axis thereof, the channels each being bounded by a first orifice defined in the top surface and a second orifice defined in the bottom surface, the first and second orifices each having different cross-sectional shapes, wherein a cross-sectional dimension of each channel is constant along its longitudinal axis; and
a plurality of bone screw openings defined through the top and bottom surfaces,
wherein a largest cross-sectional dimension of each of the plurality of channels is smaller than a smallest cross-sectional dimension of each of the bone screw openings, and wherein there are more than twice as many channels as bone screw openings;
advancing a bone screw of a plurality of bone screws within each bone screw opening of the plurality of bone screw openings; and
driving each bone screw of the plurality of bone screws into a bone.

16. The method of claim 15 , further including applying a material to the vertebral plate to promote bone ingrowth within the first and second orifices.

17. The method of claim 15 , wherein driving each bone screw of the plurality of bone screws into a bone includes driving a plurality of semi-constrained bone screws into a bone.

18. The method of claim 17 , wherein driving the plurality of semi-constrained bone screws into a bone includes threading a first helical thread disposed on a shank of each of the semi-constrained bone screws into the bone and engaging a second helical thread disposed on a head of each of the semi-constrained bone screws with a lip disposed within a corresponding bone screw opening of the plurality of bone screw openings, thereby retaining the plurality of semi-constrained bone screws within the vertebral plate.

19. The method of claim 15 , wherein the method further includes advancing an interbody spacer within a prepared intervertebral space before advancing each bone screw of the plurality of bone screws within the corresponding bone screw opening of the plurality of bone screw openings.

20. The method of claim 16 , wherein applying a material to the vertebral plate includes applying a bone growth putty to the vertebral plate to promote bone ingrowth within the first and second orifices.

Assignees

• K2M Inc

Inventors

• Moore Jennifer
• Boyd Clint
• Carnes Megan

Classifications

• A61F2/44 Primary

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

• A61F2310/00023

  Titanium or titanium-based alloys, e.g. Ti-Ni alloys · CPC title

• A61F2/4465

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

• A61F2002/3093

  for promoting ingrowth of bone tissue · CPC title

• A61F2/447

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