METHOD FOR INSERTING AND POSITIONING AN ARTIFICIAL DISC

• US 20150328012A1
• Filed: 05/26/2015
• Published: 11/19/2015
• Est. Priority Date: 05/15/2009
• Status: Active Grant

• Current Assignee: Globus Medical, Inc.
• Original Assignee: Globus Medical, Inc.
• Inventors: Hansell, Noah, Bennett, Jeff, Boyer, Michael Lee II
• Granted Patent: US 9,724,204 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 2/4603 for insertion or extraction of endoprosthetic joints or of accessories thereof
• CPC Class Codes: A61F 2/4611 of spinal prostheses
• CPC Class Codes: A61F 2002/30133 kidney-shaped or bean-shaped
• CPC Class Codes: A61F 2002/30462 retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: A61F 2002/30568 Multiple spring systems including two or more helical springs
• CPC Class Codes: A61F 2002/30571 Leaf springs
• CPC Class Codes: A61F 2002/30579 with mechanically expandable devices, e.g. fixation devices
• 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 2002/30649 Ball-and-socket joints
• 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 2002/30884 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 2002/443 having two transversal endplates and at least one intermediate component
• 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 2002/4629 connected to the endoprosthesis or implant via a threaded connection
• CPC Class Codes: A61F 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: A61F 2230/0015 Kidney-shaped, e.g. bean-shaped

Abstract

A method for inserting an intervertebral artificial disc is provided with the intervertebral disc including a first endplate having a plurality of protrusions for attaching to an adjacent vertebrae and an extension portion extending towards a second adjacent vertebrae. A second endplate is provided with a plurality of protrusions for attaching to a second adjacent vertebrae and an extension portion extending towards the first adjacent vertebrae. A flexible member having an upper portion and a lower portion and a slider plate positioned within the upper portion of the flexible member is also provided. The extension portion of the first endplate is adapted to fit within a first cavity in the upper portion of the flexible member and the extension portion of the second endplate is adapted to fit within a second cavity in the lower portion of the flexible member.

Claims

1. An intervertebral prosthetic disc comprising:

a first endplate having a plurality of protrusions for attaching to a first adjacent vertebrae and an extension portion extending towards a second adjacent vertebrae, the extension portion being spaced apart from a base of the first endplate when assembled;

a second endplate having a plurality of protrusions for attaching to the second adjacent vertebrae and an extension portion extending towards the first adjacent vertebrae, the extension portion being spaced apart from a base of the second endplate when assembled;

a resilient member having an upper portion and a lower portion;

a slider plate having an upper and lower surface positioned and enclosed within a first cavity in the upper portion of the resilient member, wherein the upper surface of the slider plate is configured to a contact a lower surface of the extension portion; and

,

wherein the extension portion of the first endplate is adapted to fit within the first cavity in the upper portion of the resilient member and the extension portion of the second endplate is adapted to fit within a second cavity in the lower portion of the resilient member,

wherein the extension portion of the first endplate engages with the upper surface of the slider plate to allow translation or rotation of the extension portion relative to the slider plate,

wherein a length of extension portion of the first endplate is smaller than a length of the slider plate.

9. The intervertebral prosthetic disc of claim 1, wherein the extension portion of the first endplate is spaced apart from the base of the first endplate by a recessed annular channel separating the base of the first endplate from the extension portion of the first endplate.

10. The intervertebral prosthetic disc of claim 1, wherein the first cavity is larger than the second cavity.

11. The intervertebral prosthetic disc of claim 1, wherein the entire extension portion of the first endplate is fully contained within and enclosed by the first cavity and the entire extension portion of the second endplate is fully contained within and enclosed by the second cavity.

12. The intervertebral prosthetic disc of claim 1, wherein the slider plate has a first lateral end and a second lateral end, and both of the first and second lateral ends are positioned within the first cavity.

13. The intervertebral prosthetic disc of claim 1, wherein the extension portion of the second endplate is adapted to fit tightly in the second cavity to limit the translational and axial motion of the second endplate with respect to the resilient member.

14. The intervertebral prosthetic disc of claim 1, wherein the extension portion of the first endplate is a single integral and continuous piece extending from the first endplate and the extension portion of the second endplate is a single integral and continuous piece extending from the second endplate.

15. The intervertebral prosthetic disc of claim 1, wherein the first endplate has a first keel for engaging the first adjacent vertebrae and the second endplate has a second keel for engaging the second adjacent vertebrae.

2. An implant comprising:

a first endplate having a plurality of protrusions for attaching to a first adjacent vertebrae and an extension portion extending towards a second adjacent vertebrae, the extension portion being spaced apart from a base of the first endplate when assembled;

a second endplate having a plurality of protrusions for attaching to the second adjacent vertebrae and an extension portion extending towards the first adjacent vertebrae, the extension portion being spaced apart from a base of the second endplate when assembled;

a resilient member having an upper portion and a lower portion;

a slider plate having an upper and lower surface positioned and enclosed within a first cavity in the upper portion of the resilient member, wherein the upper surface of the slider plate is configured to a contact a lower surface of the extension portion; and

,

wherein the extension portion of the first endplate is adapted to fit within the first cavity in the upper portion of the resilient member and the extension portion of the second endplate is adapted to fit within a second cavity in the lower portion of the resilient member

wherein the extension portion of the first endplate engages with the slider plate to allow translation of the first endplate relative to the slider plate,

wherein the length of the extension portion of the first endplate is smaller than length of the slider plate.

3. The implant of claim 2, wherein an instrument positions the first and second intervertebral prosthetic disc assemblies in the intervertebral space between adjacent vertebrae.

4. An implant comprising:

a first endplate for attaching to a first adjacent vertebrae and a first extension portion extending towards a second adjacent vertebrae, the extension portion being spaced apart from a base of the first endplate when assembled;

a second endplate for attaching to the second adjacent vertebrae and a second extension portion extending towards the first adjacent vertebrae, the extension portion being spaced apart from a base of the second endplate when assembled;

a resilient member having an upper portion and a lower portion;

wherein the first extension portion of the first endplate is adapted to fit within a first cavity in the upper portion of the resilient member,

wherein a length of the extension portion of the first endplate is smaller than a length of a slider plate,

wherein the slider plate is configured with an upper and lower surface positioned and enclosed within the first cavity in the upper portion of the resilient member.

5. The implant of claim 4, wherein the first extension portion is configured to slide on the upper surface of the slider plate.

6. The implant of claim 4, wherein a surface of the first extension portion in contact with the slider plate is substantially flat.

7. The implant of claim 4, wherein a surface of the slider plate on which the first extension portion is in contact is substantially flat.

8. The implant of claim 4, wherein the first extension portion is capable of translating along the slider plate from 0.5 mm to 1 mm.