Vertebra stabilizing assembly

• US 7,445,637 B2
• Filed: 08/08/2002
• Issued: 11/04/2008
• Est. Priority Date: 08/08/2001
• Status: Active Grant

• Current Assignee: Companion Spine LLC
• Original Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Inventors: Taylor, Jean
• Primary Examiner(s): Isabella; David J
• Assistant Examiner(s): HARVEY, JULIANNA NANCY
• Application Number:
  US10/486,046
• Publication Number:
  US 20040243239A1
• Time in Patent Office: 2,280 Days
• Field of Search: 606/61, 606248-249, 623 1711- 1716
• US Class Current: 623/17.16
• CPC Class Codes: A61B 17/7062 Devices acting on, attached to, or simulating the effect of, vertebral processes, vertebral facets or ribs rib fixation devices A61B17/8076; Tools for such devices
• CPC Class Codes: A61F 2/441 made of inflatable pockets or chambers filled with fluid, e.g. with hydrogel
• 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 2/4611 of spinal prostheses
• CPC Class Codes: A61F 2002/30131 horseshoe- or crescent- or C-shaped or U-shaped
• CPC Class Codes: A61F 2002/30133 kidney-shaped or bean-shaped
• CPC Class Codes: A61F 2002/30166 H-shaped or I-shaped
• CPC Class Codes: A61F 2002/30197 Omega-shaped
• 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 2002/4627 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 2002/4635 using minimally invasive surgery
• CPC Class Codes: A61F 2230/0013 Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
• CPC Class Codes: A61F 2230/0015 Kidney-shaped, e.g. bean-shaped
• CPC Class Codes: A61F 2230/0028 Shapes in the form of latin or greek characters
• CPC Class Codes: A61F 2230/0045 Omega-shaped

Abstract

The invention concerns an assembly comprising: a rear damping implant (10), configured to be laterally placed at the blade-spinal junction of two vertebrae (2, 3) treated without resection of the supra-spinal rear ligament (5), said implant (10) having a height such that, when set in place, it enables, to reset the supra-spinal rear ligament in anatomical tension; and at least a damping interbody implant (11), configured to be inserted between the vertebral end-plates of the two treated vertebrae (2, 3), by the same path used during dissectomy, said implant (11) having a height such that, when set in place, it enables to restore the anatomical height of the intervertebral disc (4) and to reset the front common ligament in anatomical tension.

Claims

1. A system for stabilizing a pair of adjacent vertebrae, comprising:

a posterior implant for positioning between an upper spinous process and a lower spinous process of the adjacent vertebrae, the posterior implant comprising;

a inter-spinous portion having an upper surface for engagement with the upper spinous process and a lower surface for engagement with the lower spinous process, the inter-spinous portion having a thickness between the upper surface and the lower surface sufficient to restore anatomical tension to a supra-spinous posterior ligament extending between the upper and lower spinous processes,

an upper pair of lugs extending from the inter-spinous portion for interfacing with the upper spinous process, and

a lower pair of lugs extending from the inter-spinous portion in a direction substantially opposite from the upper pair of lugs, the lower pair of lugs for interfacing with the lower spinous process,

wherein at least one of the upper lugs and at least one of the lower lugs is movable between an insertion configuration and an implantation configuration, where the insertion configuration for the at least one of the upper and lower lugs is substantially perpendicular to the implantation configuration;

wherein the posterior implant comprises a flexible, resilient material to allow motion between the adjacent vertebrae and to allow the at least one of the upper and lower lugs to resiliently return to the implantation configuration from the implantation configuration;

a removable clip for engagement with the at least one of the upper and lower lugs to selectively maintain the at least one of the upper and lower lugs in the insertion configuration; and

an anterior implant for positioning within a disc space between the adjacent vertebrae, the anterior implant having a thickness between an upper surface and a lower surface to restore anatomical tension to an anterior vertebral ligament extending between the pair of adjacent vertebrae.

2. The system of claim 1, wherein the anterior implant comprises the flexible, resilient material to allow motion between the adjacent vertebrae.

3. The system of claim 2, wherein the posterior implant and the anterior implant comprise a casing surrounding the flexible, resilient material.

4. The system of claim 1, wherein the anterior implant comprises a spherical portion deformably engaged with a ring portion.

5. The system of claim 4, wherein the spherical portion has a spherical diameter in a non-deformed configuration that is greater than a diameter of an inner opening defined by the ring portion.

6. The system of claim 5, wherein the ring portion is positioned adjacent an equator of the sphere.

7. The system of claim 1, wherein the anterior implant is elongated and curved along its length between a first end portion and a second end portion in an implantation configuration.

8. The system of claim 7, wherein the anterior implant is resiliently deformable between the implantation configuration and an insertion configuration, wherein the anterior implant is substantially straight along its length between the first end portion and the second end portion in the insertion configuration.

9. The system of claim 8, further comprising instrumentation for inserting the anterior implant, the instrumentation comprising:

an elongated tube having a passageway extending there through from a proximal portion to a distal portion, the passageway sized to receive the anterior implant in its insertion configuration adjacent the proximal portion of the tube and to allow the anterior implant to be passed through the passageway and out of the tube into the disc space adjacent the distal portion of the tube; and

a rod component for urging the anterior implant through the passageway, at least a portion of the rod component sized to extend within the passageway.

10. The system of claim 1, wherein the posterior implant and the anterior implant are sized and shaped for insertion via a common access route.

11. The system of claim 10, wherein the common access route comprises a posterior approach.

12. The system of claim 10, wherein the common access route comprises a lateral approach.

13. A spinal implant system for positioning between an upper vertebra and a lower vertebra, the system comprising:

a posterior implant for positioning between a spinous process of the upper vertebra and a spinous process of the lower vertebra, the posterior implant comprising;

a central portion having an upper surface for engagement with the spinous process of the upper vertebra and a lower surface for engagement with the spinous process of the lower vertebra, the inter-spinous portion having a thickness between the upper surface and the lower surface sufficient to restore anatomical tension to a supra-spinous posterior ligament extending between the upper and lower spinous processes,

an upper pair of projections extending from the central portion for interfacing with the spinous process of the upper vertebra, and

a lower pair of projections extending from the central portion in a direction substantially opposite from the upper pair of projections, the lower pair of projections for interfacing with the spinous process of the lower vertebra,

wherein at least one of the upper projections and at least one of the lower projections is resiliently movable between an insertion configuration and an implantation configuration, the insertion configuration for the at least one of the upper and lower projections being substantially perpendicular to the implantation configuration;

wherein the posterior implant comprises a flexible, resilient material surrounded by a woven casing to allow motion between the spinous process of the upper vertebra and the spinous process of the lower vertebra;

a clip engaged with the at least one of the upper and lower projections to maintain the at least one of the upper and lower projections in the insertion configuration, the clip removable to allow the at least one of the upper and lower projections to resiliently move to the implantation configuration; and

an anterior implant for positioning within a disc space between a vertebral body of the upper vertebra and a vertebral body of the lower vertebra, the anterior implant having a thickness between an upper surface and a lower surface to restore anatomical tension to an anterior vertebral ligament extending between the pair of adjacent vertebrae, wherein the anterior implant comprises a flexible, resilient material surrounded by a woven casing to allow motion between the vertebral body of the upper vertebra and the vertebral body of the lower vertebra;

wherein the posterior implant and the anterior implant are sized and shaped for insertion via a common access route.

14. The system of claim 13, wherein the common access route comprises a posterior approach.

15. The system of claim 14, wherein the posterior implant further comprises an upper channel and a lower channel, the upper and lower channels for receiving elongated fixation devices for securing the posterior implant to the spinous processes of the upper and lower vertebrae.

16. The system of claim 13, wherein the anterior implant comprises a spherical portion deformably engaged with a ring portion, the ring portion for limiting movement of the anterior implant.

17. The system of claim 16, wherein the spherical portion has a spherical diameter in a non-deformed configuration that is greater than a diameter of an inner opening defined by the ring portion.

18. The system of claim 17, wherein the spherical portion is deformed due to engagement with the ring portion adjacent an equator of the sphere.

19. The system of claim 13, wherein the anterior implant is resiliently deformable between the insertion configuration and the implantation configuration, the anterior implant being elongated and curved along its length in the implantation configuration, and substantially straight along its length in the insertion configuration.

20. The system of claim 19, further comprising instrumentation for inserting the anterior implant, the instrumentation comprising:

an elongated tube having a passageway extending from a proximal opening to a distal opening, the passageway sized to receive the anterior implant in its insertion configuration from the proximal opening of the tube and to allow the anterior implant to be passed through the passageway and out of the distal opening of the tube into the disc space; and

a rod component for urging the anterior implant through the passageway, at least a portion of the rod component sized to extend within the passageway.