Intervertebral stabilization system

• US 8,613,757 B2
• Filed: 05/29/2008
• Issued: 12/24/2013
• Est. Priority Date: 12/17/2004
• Status: Expired due to Fees

• Current Assignee: Zimmer GmbH (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Zimmer GmbH (Zimmer Biomet Holdings, Inc.)
• Inventors: Egli, Thomas, Zylber, Emmanuel, Lancial, Michael E.
• Primary Examiner(s): Cumberledge, Jerry
• Application Number:
  US12/128,705
• Publication Number:
  US 20080294196A1
• Time in Patent Office: 2,035 Days
• Field of Search: 606246-278, 606300-309, 623 1711- 1716
• US Class Current: 606/246
• CPC Class Codes: A61B 17/7001 Screws or hooks combined with longitudinal elements which do not contact vertebrae A61B17/7058 takes precedence
• CPC Class Codes: A61B 17/7004 with a cross-section which varies along its length A61B17/7019 takes precedence
• CPC Class Codes: A61B 17/7005 Parts of the longitudinal elements, e.g. their ends, being specially adapted to fit in the screw or hook heads
• CPC Class Codes: A61B 17/7007 Parts of the longitudinal elements, e.g. their ends, being specially adapted to fit around the screw or hook heads
• CPC Class Codes: A61B 17/7008 with parts of, or attached to, the longitudinal elements, bearing against an outside of the screw or hook heads, e.g. nuts on threaded rods A61B17/7007 takes precedence
• CPC Class Codes: A61B 17/7019 Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other
• CPC Class Codes: A61B 17/702 having a core or insert, and a sleeve, whereby a screw or hook can move along the core or in the sleeve
• CPC Class Codes: A61B 17/705 for linking adjacent ends of longitudinal elements
• CPC Class Codes: A61B 17/7052 of variable angle or length

Abstract

An intervertebral stabilization system for at least three vertebrae comprising

• • pedicle screws attachable to the vertebrae;
  • at least one rod for the connection of at least two pedicle screws to form a rigid stiffening system; and
  • at least one band which is capable of being pre-stressed in tension and which is surrounded in the implanted state of the stabilization system by at least one compressible pressure member arranged between two adjacent pedicle screws for the connection of the pedicle screws to form an elastic support system,
    wherein a common pedicle screw is associated both with the stiffening system and with the support system and the band is can be connected or is connected to the rod by means of a band attachment.

Claims

1. An intervertebral stabilization system comprising:

a first vertebral fastener configured to be secured to a first vertebra;

a second vertebral fastener configured to be secured to a second vertebra;

a third vertebral fastener configured to be secured to a third vertebra;

a rigid member including a rigid rod and having an end region including a first flange and a second flange spaced from the first flange by a medial portion, wherein the rigid member including the rigid rod, the first flange, the second flange and the medial portion is a single piece monolithic structure; and

an elastic support system including a spacer and a flexible member sized to be inserted into the spacer;

wherein the flexible member is connected to the rigid member at a connection location in the medial portion, wherein the end region of the rigid member includes a bore configured to receive an end of the flexible member, the bore having a length extending along a longitudinal axis of the medial portion, wherein the length of the bore is less than a length of the medial portion such that when the end of the flexible member is disposed in the bore, the end of the flexible member is positioned between the first and second flanges;

wherein the rigid member, including the rigid rod, is positionable from the first vertebral fastener to the second vertebral fastener;

wherein the flexible member is positionable between the second vertebral fastener and the third vertebral fastener; and

wherein the connection location is positionable proximate the second vertebral fastener.

2. The intervertebral stabilization system of claim 1, wherein the medial portion between the first flange and the second flange is configured to be secured to the second vertebral fastener.

3. The intervertebral stabilization system of claim 2, wherein the second vertebral fastener has a head portion including a channel extending from one side of the head portion to a second side of the head portion, wherein the medial portion is positionable in the channel.

4. The intervertebral stabilization system of claim 3, wherein the first flange is positionable adjacent the first side of the head portion and the second flange is positionable adjacent the second side of the head portion.

5. The intervertebral stabilization system of claim 4, wherein the spacer is positionable in abutment with the first flange.

6. An intervertebral stabilization system comprising:

a first vertebral fastener configured to be secured to a first vertebra;

a second vertebral fastener configured to be secured to a second vertebra;

a third vertebral fastener configured to be secured to a third vertebra; and

a support element including a rigid support portion and a flexible support portion, wherein the rigid support portion includes a rigid member including a rigid rod and having an end region having a first flange formed as a monolithic structure of the rigid member, and the flexible support portion includes a spacer and a flexible member sized to be inserted into the spacer;

wherein the end region of the rigid member includes a bore configured to receive an end portion of the flexible member, the bore having a length extending along a longitudinal axis of the rigid member less than a length of the end region of the rigid member;

wherein the first flange has an outer diameter greater than an outer diameter of another portion of the rigid member;

wherein the flexible member is connected to the rigid member at a connection location; and

wherein at least a portion of the rigid support portion, including the rigid rod, is positionable between the first vertebral fastener and the second vertebral fastener and at least a portion of the flexible support portion is positionable between the second vertebral fastener and the third vertebral fastener.

7. The intervertebral stabilization system of claim 6, wherein the connection location between the rigid member and the flexible member is positionable at a head portion of the second vertebral fastener.

8. The intervertebral stabilization system of claim 7, wherein the flexible member and spacer are configured to extend from the head portion of the second vertebral fastener from a first side of the head portion, and the rigid member is configured to extend from the head portion of the second vertebral fastener from a second side of the head portion.

9. The intervertebral stabilization system of claim 8, wherein the first flange is positionable on the first side of the head portion of the second vertebral fastener.

10. The intervertebral stabilization system of claim 9, wherein the spacer is positionable in abutment with the first flange of the rigid member.

11. The intervertebral stabilization system of claim 9, wherein the end region of the rigid member includes a second flange spaced from the first flange by a medial portion, the second flange and medial portion being formed as a monolithic structure of the rigid member, wherein the second flange is positionable on the second side of the head portion of the second vertebral fastener.

12. The intervertebral stabilization system of claim 8, wherein the first flange is positionable on the second side of the head portion of the second pedicle screw.

13. The intervertebral stabilization system of claim 6, wherein the flexible member is placed in tension.

14. The intervertebral stabilization system of claim 6, wherein the spacer is placed in compression.

15. The intervertebral stabilization system of claim 6, wherein the spacer is a pressure member.

16. An intervertebral stabilization system comprising:

a first vertebral fastener configured to be secured to a first vertebra;

a second vertebral fastener configured to be secured to a second vertebra;

a third vertebral fastener configured to be secured to a third vertebra;

a rigid member including a rigid rod and having a first end region and a second end region, the second end region including a first flange formed as a monolithic structure of the rigid member, wherein the first vertebral fastener is configured to be connected to the first end region of the rigid member, and wherein the second vertebral fastener is configured to be connected to the second end region of the rigid member such that the first flange and rigid rod are positioned on a first side of the second vertebral fastener; and

an elastic support system having at least a portion configured to extend between the second vertebral fastener and the third vertebral fastener, the elastic support system including a spacer and a flexible member sized to be inserted into the spacer, wherein the second end region of the rigid member includes a bore configured to receive an end of the flexible member, the bore having a length extending along a longitudinal axis of the rigid member less than a length of the second end region.

17. The intervertebral stabilization system of claim 16, wherein the flexible member is configured to extend from the second vertebral fastener to the third vertebral fastener.

18. The intervertebral stabilization system of claim 16, wherein the spacer is positionable in abutment with the first flange of the second end region of the rigid member.

19. The intervertebral stabilization system of claim 16, wherein the first vertebral fastener includes a head portion defining a channel, wherein the first end region of the rigid member is positionable through the channel of the first vertebral fastener.

20. The intervertebral stabilization system of claim 19, wherein the second vertebral fastener includes a head portion defining a channel, wherein at least a portion of the second end region of the rigid member is positionable in the channel of the second vertebral fastener.

21. The intervertebral stabilization system of claim 20, wherein the third vertebral fastener includes a head portion defining a channel, wherein the flexible member is positionable through the channel of the third vertebral fastener.

22. The intervertebral stabilization system of claim 16, wherein the rigid member is configured to extend from a second side of the second vertebral fastener toward the first vertebral fastener, and the flexible member and spacer are configured to extend from the first side of the second vertebral fastener toward the third vertebral fastener.

23. The intervertebral stabilization system of claim 22, wherein the second end region of the rigid member includes a second flange formed as a monolithic structure of the rigid member and configured to be positioned on the second side of the second vertebral fastener.

24. The intervertebral stabilization system of claim 23, wherein the second end region of the rigid member includes a medial portion formed as a monolithic structure of the rigid member that is located between the first flange and the second flange, wherein the medial portion is positionable within a channel of the second vertebral fastener.