Intervertebral implants, systems, and methods of use

• US 9,848,992 B2
• Filed: 11/30/2015
• Issued: 12/26/2017
• Est. Priority Date: 12/21/2010
• Status: Active Grant

• Current Assignee: Depuy Synthes Products Incorporated (Johnson & Johnson)
• Original Assignee: Depuy Synthes Products Incorporated (Johnson & Johnson)
• Inventors: McDonough, William P., Strausbaugh, William L., Chronister, Benjamin, Pepe, Thomas, Coover, Michael, Coffman, Katharine, Kueenzi, Thomas, Chan, Edwin, Pakzaban, Peyman, Schmura, Kurt
• Primary Examiner(s): Robert, Eduardo C
• Assistant Examiner(s): CARTER, TARA ROSE E
• Application Number:
  US14/954,412
• Publication Number:
  US 20160089249A1
• Time in Patent Office: 757 Days
• Field of Search: 623 1711, 606246-249
• CPC Class Codes: A61B 17/1757 for the spine
• CPC Class Codes: A61B 17/86 Pins or screws or threaded wires; nuts therefor A61B17/72 take precedence
• CPC Class Codes: A61F 2/28 Bones joints A61F2/30
• CPC Class Codes: A61F 2/3094 Designing or manufacturing processes
• CPC Class Codes: A61F 2/4455 for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages intervertebral discs A61F2/442
• CPC Class Codes: A61F 2/4465 having a circular or kidney shaped cross-section substantially perpendicular to the axis of the spine
• CPC Class Codes: A61F 2/4611 of spinal prostheses
• CPC Class Codes: A61F 2002/2835 Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material
• CPC Class Codes: A61F 2002/30131 horseshoe- or crescent- or C-shaped or U-shaped
• CPC Class Codes: A61F 2002/30387 Dovetail connection
• CPC Class Codes: A61F 2002/30477 using sharp protrusions, e.g. spikes, for anchoring into connecting prosthetic part
• CPC Class Codes: A61F 2002/305 Snap connection
• CPC Class Codes: A61F 2002/30571 Leaf springs
• CPC Class Codes: A61F 2002/30576 with extending fixation tabs
• CPC Class Codes: A61F 2002/30604 modular
• CPC Class Codes: A61F 2002/30774 internally-threaded
• CPC Class Codes: A61F 2002/30787 inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/4622 having the shape of a forceps or a clamp
• CPC Class Codes: A61F 2310/00023 Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: A61F 2310/00131 Tantalum or Ta-based alloys
• CPC Class Codes: A61F 2310/00293 : containing a phosphorus-containing compound, e.g. apatite
• CPC Class Codes: A61F 2310/00299 : based on metal nitrides
• CPC Class Codes: A61F 2310/00359 : Bone or bony tissue

Abstract

An intervertebral implant frame that is configured to be attached to a spacer body can include a pair of arms that extend longitudinally from a support member such that the arms extend substantially around the spacer body. The arms may be configured to expand, crimp, or otherwise engage the spacer body to thereby hold the spacer body to the frame. The spacer body may be made from bone graft.

Claims

1. An intervertebral implant frame comprising:

a support member including a body that defines an outer surface, an inner surface spaced from the outer surface in a longitudinal direction, and at least two fixation element receiving apertures that extend through the body;

a first arm that extends from the support member to a first terminal end, the first arm including a first inner spacer contacting surface, and a first outer surface opposite the first inner spacer contacting surface;

a second arm that extends from the support member to a second terminal end, the second arm including a second inner spacer contacting surface spaced from the first inner spacer contacting surface along a lateral direction that is perpendicular to the longitudinal direction, and a second outer surface opposite the second inner spacer contacting surface; and

wherein the inner surface, the first inner spacer contacting surface, and the second inner spacer contacting surface combine to define a void that is configured to receive a spacer body, the void defining a first width measured from the first inner spacer contacting surface to the second inner spacer contacting surface along the lateral direction at a first position, the void defining a second width measured from the first inner spacer contacting surface to the second inner spacer contacting surface along the lateral direction at a second position, and the void defining a third width measured from the first inner spacer contacting surface to the second inner spacer contacting surface along the lateral direction at a third position,

wherein the first width is less than the second width, the third width is greater than the first width, the second position is between the first position and the support member with respect to the longitudinal direction, the first position is between the third position and the support member with respect to the longitudinal direction, and the support member defines a fourth width measured in the lateral direction, the first and second arms define a fifth width measured between a first location on the first outer surface and a second location on the second outer surface in the lateral direction, the first and second locations being located on a plane that

     1) is defined by the longitudinal direction and the lateral direction and

     2) passes through at least one of the at least two fixation element receiving apertures, and the fourth width is greater than each of the first, second, third, and fifth widths.

2. The intervertebral implant frame of claim 1, wherein the fifth width of the first and second arms is measured at the second position.

3. The intervertebral implant frame of claim 1, wherein the support member includes a retention member that extends from the inner surface in the longitudinal direction, the retention member positioned between the first arm and the second arm with respect to the lateral direction.

4. The intervertebral implant frame of claim 3, wherein the retention member is a spike that is configured to retain the spacer body when the spacer body is being supported by the intervertebral implant frame.

5. The intervertebral implant frame of claim 3, wherein the retention member is positioned between two of the at least two fixation element receiving apertures with respect to the lateral direction.

6. The intervertebral implant frame of claim 1, wherein the support member includes an upper surface and a lower surface, the upper surface spaced from the lower surface in a transverse direction that is perpendicular to both the longitudinal and lateral directions, the upper surface including a first portion that is parallel to the lateral direction, the lower surface including a second portion that is convex, and both the first portion and the second portion are aligned with respect to the transverse direction.

7. The intervertebral implant frame of claim 6, wherein the at least two fixation element receiving apertures include a first aperture, a second aperture, a third aperture, and a fourth aperture.

8. The intervertebral implant frame of claim 7, wherein both the second aperture and the third aperture are positioned between the first aperture and the fourth aperture with respect to the lateral direction, both the first aperture and the fourth aperture are angled in the transverse direction, and both the second aperture and the third aperture are angled in a direction opposite the transverse direction.

9. The intervertebral implant of claim 6, wherein the plane is equidistant from the upper surface and the lower surface of the support member in the transverse direction.

10. The intervertebral implant frame of claim 1, wherein at least a portion of the first inner spacer contacting surface is straight.

11. The intervertebral implant frame of claim 10, wherein at least a portion of the second inner spacer contacting surface is straight.

12. The intervertebral implant of claim 1, wherein the fourth width is greater than all of the widths of the first arm and the second arm.

13. An intervertebral implant frame comprising:

a support member including a body that defines an outer surface, an inner surface spaced from the outer surface in a longitudinal direction, the inner surface defining a retention member that is monolithic with the body of the support member and extends in a direction away from the outer surface in the longitudinal direction, the retention member configured to retain a spacer body when the spacer body is coupled to the intervertebral implant frame, and at least two fixation element receiving apertures that extend through the body from the outer surface to the inner surface;

a first arm that extends from the support member, the first arm including a first inner spacer contacting surface; and

a second arm that extends from the support member, the second arm including a second inner spacer contacting surface spaced from the first inner spacer contacting surface along a lateral direction that is perpendicular to the longitudinal direction such that the retention member is positioned between the first arm and the second arm with respect to the lateral direction,

wherein the inner surface, the first inner spacer contacting surface, and the second inner spacer contacting surface together define a void configured to receive the spacer body.

14. The intervertebral implant frame of claim 13, wherein the retention member is a spike that is configured to retain the spacer body when the spacer body is received in the void.

15. The intervertebral implant frame of claim 13, wherein the retention member is positioned between two of the at least two fixation element receiving apertures with respect to the lateral direction.

16. The intervertebral implant frame of claim 13, wherein the support member includes an upper surface and a lower surface, the upper surface spaced from the lower surface in a transverse direction that is perpendicular to both the longitudinal and lateral directions, the upper surface including a first portion that is parallel to the lateral direction, the lower surface including a second portion that is convex, and both the first portion and the second portion are aligned with respect to the transverse direction.

17. The intervertebral implant frame of claim 16, wherein the at least two fixation element receiving apertures include a first aperture, a second aperture, a third aperture, and a fourth aperture, both the second aperture and the third aperture are positioned between the first aperture and the fourth aperture with respect to the lateral direction, both the first aperture and the fourth aperture are angled in the transverse direction, and both the second aperture and the third aperture are angled in a direction opposite the transverse direction.

18. The intervertebral implant frame of claim 13, wherein the support member includes an upper surface and a lower surface, the upper surface spaced from the lower surface in transverse direction that is perpendicular to both the longitudinal and lateral directions, at least one of the at least two fixation element receiving apertures extends through the upper surface, and at least one of the at least two fixation element receiving apertures extends through the lower surface.

19. An intervertebral implant frame comprising:

a support member including a body that defines an outer surface, an inner surface spaced from the outer surface in a longitudinal direction, a lower surface, an upper surface spaced from the lower surface in a transverse direction that is perpendicular to the longitudinal direction, a first fixation element receiving aperture that extends through the body from the outer surface to the inner surface, and a second fixation element receiving aperture that extends through the body from the outer surface to the inner surface, the first fixation element receiving aperture spaced from the second fixation element receiving aperture in a lateral direction that is perpendicular to both the longitudinal direction and the transverse direction, the upper surface including a first portion that is parallel to the lateral direction, the lower surface including a second portion that is convex in a direction opposite the transverse direction, and both the first portion and the second portion are aligned with respect to the transverse direction;

a first arm that extends from the support member to a first terminal end such that the first terminal end is positioned beyond the inner surface with respect to the longitudinal direction, the first arm including a first inner spacer contacting surface; and

a second arm that extends from the support member to a second terminal end such that the second terminal end is positioned beyond the inner surface with respect to the longitudinal direction, the second arm including a second inner spacer contacting surface spaced from the first inner spacer contacting surface along the lateral direction.

20. The intervertebral implant frame of claim 19, wherein the body defines a third aperture and a fourth aperture, the second aperture and the third aperture both positioned between the first aperture and the fourth aperture with respect to the lateral direction, both the first aperture and the fourth aperture are angled in the transverse direction, and both the second aperture and the third aperture are angled in the direction opposite the transverse direction.

21. The intervertebral implant frame of claim 20, wherein the outer surface defines a first opening of the first fixation aperture, a second opening of the second fixation aperture, a third opening of the third fixation aperture, and a fourth opening of the fourth fixation aperture, the first aperture, the second aperture, the third aperture, and the fourth aperture being aligned such that a plane parallel to the lateral direction intersects each of the first aperture, the second aperture, the third aperture, and the fourth aperture.