Artificial disc

• US 8,613,771 B2
• Filed: 05/15/2009
• Issued: 12/24/2013
• 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
• Primary Examiner(s): Isabella, David
• Assistant Examiner(s): Woznicki, Jacqueline
• Application Number:
  US12/466,680
• Publication Number:
  US 20100292801A1
• Time in Patent Office: 1,684 Days
• Field of Search: 623/17.11, 623 1715- 1716
• US Class Current: 623/17.15
• CPC Class Codes: A61B 17/1671 for the spine
• CPC Class Codes: A61F 2/44 for the spine, e.g. vertebrae, spinal discs
• 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 2/4684 Trial or dummy prostheses
• CPC Class Codes: A61F 2002/30011 differing in porosity
• CPC Class Codes: A61F 2002/30014 differing in elasticity, stiffness or compressibility
• CPC Class Codes: A61F 2002/30065 thermoplastic, i.e. softening or fusing when heated, and hardening and becoming rigid again when cooled
• CPC Class Codes: A61F 2002/30092 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 2002/30115 circular-O-shaped
• CPC Class Codes: A61F 2002/30131 horseshoe- or crescent- or C-shaped or U-shaped
• CPC Class Codes: A61F 2002/30166 H-shaped or I-shaped
• CPC Class Codes: A61F 2002/30242 spherical
• CPC Class Codes: A61F 2002/30518 with possibility of relative movement between the prosthetic parts
• CPC Class Codes: A61F 2002/30538 for adjusting angular orientation
• CPC Class Codes: A61F 2002/30553 for adjusting a position by translation along an axis
• CPC Class Codes: A61F 2002/30563 having elastic means or damping means, different from springs, e.g. including an elastomeric core or shock absorbers
• CPC Class Codes: A61F 2002/30565 having spring elements
• CPC Class Codes: A61F 2002/30579 : with mechanically expandable devices, e.g. fixation devices
• CPC Class Codes: A61F 2002/30581 : having a pocket filled with fluid, e.g. liquid
• CPC Class Codes: A61F 2002/30584 : filled with gas
• CPC Class Codes: A61F 2002/30593 : hollow
• 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 2002/30614 : Sets comprising both primary and revision endoprostheses
• CPC Class Codes: A61F 2002/30616 : Sets comprising a plurality of prosthetic parts of different sizes or orientations
• CPC Class Codes: A61F 2002/30624 : Hinged joint, e.g. with transverse axle restricting the movement
• CPC Class Codes: A61F 2002/30632 : with rotation-limiting stops, e.g. projections or recesses
• CPC Class Codes: A61F 2002/30649 : Ball-and-socket joints
• CPC Class Codes: A61F 2002/30652 : Special cut-outs, e.g. flat or grooved cut-outs
• CPC Class Codes: A61F 2002/30654 : Details of the concave socket
• CPC Class Codes: A61F 2002/30662 : with rotation-limiting means
• CPC Class Codes: A61F 2002/30677 : Means for introducing or releasing pharmaceutical products, e.g. antibiotics, into the body
• CPC Class Codes: A61F 2002/30769 : madreporic
• CPC Class Codes: A61F 2002/30777 : Oblong apertures
• CPC Class Codes: A61F 2002/30779 : arcuate
• CPC Class Codes: A61F 2002/30802 : arcuate
• CPC Class Codes: A61F 2002/30825 : arcuate
• CPC Class Codes: A61F 2002/30828 : parallel
• CPC Class Codes: A61F 2002/30878 : with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
• CPC Class Codes: A61F 2002/30879 : Ribs
• CPC Class Codes: A61F 2002/30886 : externally-threaded
• CPC Class Codes: A61F 2002/3093 : for promoting ingrowth of bone tissue
• 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 2002/4627 : with linear motion along or rotating motion about the instrument axis or the implantation direction, e.g. telescopic, along a guiding rod, screwing inside the instrument
• CPC Class Codes: A61F 2002/4629 : connected to the endoprosthesis or implant via a threaded connection
• CPC Class Codes: A61F 2210/0014 : using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 2220/0016 : with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61F 2230/0006 : circular
• CPC Class Codes: A61F 2230/0013 : Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
• CPC Class Codes: A61F 2230/0028 : Shapes in the form of latin or greek characters
• CPC Class Codes: A61F 2230/0071 : spherical
• CPC Class Codes: A61F 2250/0006 : for adjusting angular orientation
• CPC Class Codes: A61F 2250/0008 : for adjusting a position by translation along an axis or two perpendicular axes
• CPC Class Codes: A61F 2250/0018 : differing in elasticity, stiffness or compressibility
• CPC Class Codes: A61F 2310/00011 : Metals or alloys
• CPC Class Codes: A61F 2310/00047 : Aluminium or Al-based alloys
• CPC Class Codes: A61F 2310/00179 : Ceramics or ceramic-like structures
• 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
• CPC Class Codes: A61F 2310/0097 : Coating or prosthesis-covering structure made of pharmaceutical products, e.g. antibiotics

Abstract

An intervertebral artificial disc is provided with 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 artificial disc for positioning between a first and second vertebra, comprising:

a first endplate having a plurality of protrusions for attaching to the first vertebrae and an extension portion extending towards the second adjacent vertebra;

a second endplate having a plurality of protrusions for attaching to the second vertebrae and an extension portion extending towards the first vertebrae;

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

a plate positioned completely within a first cavity in the upper portion of the flexible member; and

,

wherein the extension portion of the first endplate is adapted to fit within the 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

wherein the extension portion of the first endplate engages with the plate to allow translation.

2. The intervertebral artificial disc according to claim 1, wherein the first cavity in the upper portion of the flexible member is larger in length and width than the extension portion of the first endplate.

3. The intervertebral artificial disc according to claim 1, wherein the second cavity of the lower portion of the flexible member is a larger area than the extension portion of the second endplate.

4. The intervertebral artificial disc according to claim 1, wherein the extension portion of the second endplate compresses between 0.5 mm to 1 mm with respect to the flexible member.

5. The intervertebral artificial disc according to claim 1, wherein the plurality of protrusions on the first and second endplate are configured as multiple keels.

6. The intervertebral artificial disc according to claim 1, wherein a contact surface of the extension portion of the second endplate has a radius.

7. The intervertebral artificial disc according to claim 1, wherein the first endplate, the second endplate and the plate are composed of a metal.

8. The intervertebral artificial disc according to claim 1, wherein the first endplate, the second endplate and the plate are composed of a polymer.

9. An intervertebral artificial disc for positioning between a first and second vertebra, comprising:

a first endplate having a plurality of protrusions for attaching to the first adjacent vertebrae the first endplate having an extension portion extending towards the second vertebrae;

a second endplate having a plurality of protrusions for attaching to the second vertebrae and an extension portion extending towards the first vertebrae;

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

a plate positioned completely within a first cavity in the upper portion of the flexible member; and

wherein the extension portion of the first endplate is adapted to fit within the 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 at least one cord extending through the first endplate, the plate, the flexible member, and the second endplate.

10. The intervertebral artificial disc according to claim 9 wherein the extension portion of the first endplate engages with the plate to allow translation.

11. The intervertebral artificial disc according to claim 9 wherein the first cavity in the upper portion of the flexible member is dimensionally larger than the extension portion of the first endplate.

12. The intervertebral artificial disc according to claim 9 wherein the plurality of protrusions in the first and second endplate are configured as multiple keels.

13. The intervertebral artificial disc according to claim 9 wherein the second cavity of the lower portion of the flexible member is dimensionally larger than the extension portion of the second endplate.

14. The intervertebral artificial disc according to claim 9 wherein the second endplate provides flexion and extension motion with respect to the flexible member.

15. The intervertebral artificial disc according to claim 9 wherein a top surface of the extension portion of the second endplate is configured with radius.

16. The intervertebral artificial disc according to claim 9 wherein the cord is flexible.

17. The intervertebral artificial disc according to claim 9 wherein the cord is tensioned.

18. The intervertebral artificial disc according to claim 9 wherein the cord is attached to the first and second endplates with a crimp.

19. An intervertebral artificial disc positioned between a first vertebra and a second vertebrae, comprising:

a first endplate having a plurality of protrusions for attaching to the first vertebrae and an extension portion extending towards the second vertebrae;

a second endplate having a plurality of protrusions for attaching to a second vertebrae and an extension portion extending towards the first vertebrae;

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

a plate positioned completely within a first cavity in the upper portion of the flexible member; and

wherein the extension portion of the first endplate is adapted to fit within the 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 a first cord extending through the first endplate, the plate, the flexible member, and the second endplate;

a second cord spaced apart from the first cord extending through the first endplate, the plate flexible member and the second endplate wherein the first and second cord restrict rotational motion of the intervertebral disc, and wherein the extension portion of the first endplate engages with the plate to allow for translation of the first endplate plate with respect to the second endplate.