Transforaminal prosthetic spinal disc apparatus

• US 8,906,069 B2
• Filed: 02/12/2014
• Issued: 12/09/2014
• Est. Priority Date: 12/07/2009
• Status: Active Grant

• Current Assignee: Globus Medical, Inc.
• Original Assignee: Globus Medical, Inc.
• Inventors: Hansell, Noah, Bennett, Jeffrey, Paul, David C
• Primary Examiner(s): Philogene, Pedro
• Assistant Examiner(s): COMSTOCK, DAVID C
• Application Number:
  US14/179,102
• Publication Number:
  US 20140163685A1
• Time in Patent Office: 300 Days
• Field of Search: 623 1711- 1716, 606246-249, 606/279
• US Class Current: 606/279
• CPC Class Codes: A61F 2/30771 applied in original prostheses, e.g. holes or grooves
• CPC Class Codes: A61F 2/442 Intervertebral or spinal discs, e.g. resilient non-disc-shaped intervertebral inflatable pockets A61F2/441; non-disc-shaped intervertebral fusion implants A61F2/4455
• CPC Class Codes: A61F 2/4425 made of articulated components
• 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 2002/30362 with possibility of relative movement between the protrusion and the recess
• CPC Class Codes: A61F 2002/30365 with additional means for limiting said rotation
• CPC Class Codes: A61F 2002/30369 Limited lateral translation of the protrusion within a larger recess
• CPC Class Codes: A61F 2002/30507 using a threaded locking member, e.g. a locking screw or a set screw
• CPC Class Codes: A61F 2002/30594 slotted, e.g. radial or meridian slot ending in a polar aperture, non-polar slots, horizontal or arcuate slots
• CPC Class Codes: A61F 2002/30604 modular
• CPC Class Codes: A61F 2002/30616 Sets comprising a plurality of prosthetic parts of different sizes or orientations
• CPC Class Codes: A61F 2002/3065 Details of the ball-shaped head
• CPC Class Codes: A61F 2002/30654 Details of the concave socket
• CPC Class Codes: A61F 2002/30658 having a central conforming area surrounded by a peripheral annular non-conforming area
• CPC Class Codes: A61F 2002/30662 with rotation-limiting means
• CPC Class Codes: A61F 2002/30884 Fins or wings, e.g. longitudinal wings for preventing rotation within the bone cavity
• CPC Class Codes: A61F 2002/30904 serrated profile, i.e. saw-toothed
• CPC Class Codes: A61F 2002/448 comprising multiple adjacent spinal implants within the same intervertebral space or within the same vertebra, e.g. comprising two adjacent spinal implants
• CPC Class Codes: A61F 2220/0025 Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2220/0033 made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2310/00023 : Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: A61F 2310/00407 : Coating made of titanium or of Ti-based alloys
• CPC Class Codes: A61F 2310/00796 : Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite

Abstract

An intervertebral prosthetic implant having a first endplate having a first surface configured to substantially engage with a first vertebral body and a second surface having an extension with a concave contact surface, the concave contact surface being spaced apart from the second surface. A second endplate is provided with a first surface configured to substantially engage with a second vertebral body and a second surface comprising a convex contact surface, and the second endplate having a securing element positioned along and above the second surface defining a first and second window on opposing sides of the second surface. The securing element extends along the width and length of the lower endplate and configured with an access hole. An extension portion extends from the first surface of the first endplate through the access hole of the securing element and contacts the second surface of the second endplate.

Claims

1. A surgical method comprising:

inserting an implant via a transforaminal approach into a patient, wherein the implant comprises;

a first endplate having a first surface configured to substantially engage a first vertebral body, the first endplate including a first keel; and

a second endplate having a second surface configured to substantially engage with a second vertebral body, the second endplate including a second keel,

wherein the second endplate includes a first window and an opposing second window

wherein a portion of the first endplate directly contacts a surface of the second endplate and is retained within the first and second windows of the second endplate.

2. The surgical method of claim 1, further comprising removing a portion of a facet joint.

3. The surgical method of claim 1, wherein the second endplate includes a partially spherical convex surface.

4. The surgical method of claim 1, wherein the second endplate includes a pair of curved rails that form the first window and the second window of the implant.

5. The surgical method of claim 1, wherein the first endplate includes an extension portion having a partially spherical concave surface.

6. The surgical method of claim 5, wherein the partially spherical concave surface of the first endplate engages a partially spherical convex surface of the second endplate.

7. The surgical method of claim 1, wherein the first keel includes at least one slot.

8. The surgical method of claim 1, wherein the first keel and the second keel include openings capable of receiving an insertion instrument therein.

9. The surgical method of claim 1, wherein the first window and the second window are part of an element having an access hole.

10. The surgical method of claim 1, wherein the first endplate includes an extension portion that can extend into the access hole.

11. The surgical method of claim 1, wherein the first keel and the second keel include at least one slot.

12. A surgical method comprising:

removing a portion of a facet joint of a patient; and

inserting an implant into the patient, wherein the implant comprises;

a first endplate having a first surface configured to substantially engage a first vertebral body, the first endplate including a first keel; and

a second endplate having a second surface configured to substantially engage with a second vertebral body, the second endplate including a second keel,

wherein the second endplate includes a first window and an opposing second window

wherein a portion of the first endplate directly contacts a surface of the second endplate and is retained within the first and second windows of the second endplate.

13. The surgical method of claim 12, wherein the second endplate includes a partially spherical convex surface.

14. The surgical method of claim 12, wherein the second endplate includes a pair of curved rails that form the first window and the second window of the implant.

15. The surgical method of claim 12, wherein the first endplate includes an extension portion having a partially spherical concave surface.

16. The surgical method of claim 15, wherein the partially spherical concave surface of the first endplate engages a partially spherical convex surface of the second endplate.

17. A surgical method comprising:

inserting an implant into an disc space in a patient, wherein the implant comprises;

a first endplate having a first surface configured to substantially engage a first vertebral body, the first endplate including a first keel; and

a second endplate having a second surface configured to substantially engage with a second vertebral body, the second endplate including a second keel,

wherein the second endplate includes a first window and an opposing second window,

wherein a portion of the first endplate directly contacts a surface of the second endplate and is retained within the first and second windows of the second endplate.

18. The surgical method of claim 17, wherein the implant is inserted transforaminally.

19. The surgical method of claim 17, wherein the first endplate includes a concave surface and the second endplate includes a convex surface that contacts the concave surface.

20. The surgical method of claim 17, wherein the first and second keel each include at least one slot.