Interspinous process implant including a binder and method of implantation

• US 20060064165A1
• Filed: 03/31/2005
• Published: 03/23/2006
• Est. Priority Date: 09/23/2004
• Status: Abandoned Application

• Current Assignee: Kyphon SARL (Medtronic Plc), BEA Systems Incorporated (Oracle Corporation)
• Original Assignee: St. Francis Medical Technologies, Inc. (Medtronic Plc)
• Inventors: Flynn, John J., Zucherman, James F., Winslow, Charles J., Markwart, John A., Hsu, Ken Y., Yerby, Scott A., Klyce, Henry, Mitchell, Steve T.
• Application Number:
  US11/095,440
• Publication Number:
  US 20060064165A1
• Time in Patent Office: Days
• US Class Current: 623/17.110
• CPC Class Codes: A61B 17/7068 Devices comprising separate rigid parts, assembled in situ, to bear on each side of spinous processes; Tools therefor

Abstract

Systems in accordance with embodiments of the present invention can include an implant comprising a spacer for defining a minimum space between adjacent spinous processes, a distraction guide for piercing and distracting an interspinous ligament during implantation, and a binder for limiting or preventing flexion motion of the targeted motion segment. The binder can be secured to a brace associated with the implant during implantation by a capture device. In one embodiment, the capture device includes a fixed piece extending from the brace and a slidable piece associated with the fixed piece. A fastener can be rotated to pinch the binder between the slidable piece and a wall of the brace, securing the binder. A physician need not know the length of the binder prior to implantation, reducing the time required to perform a procedure.

Claims

1. An implant for relieving pain associated with at least one of the spine and surrounding tissues and structures, which implant is positionable between spinous processes of the spine, the implant comprising:

a first unit including a body, a distraction guide extending from said body, and a first wing;

a second wing selectably connectable with the first unit;

a binder adapted to be disposed around the spinous processes, the binder having an anchor end and a length extending from the anchor end; and

wherein;

the anchor end is connected with the second wing;

a capture device extends from the second wing and wherein the capture device can secure the binder along the length.

2. The implant of claim 1, further comprising:

a binder aligner selectably connectable with the first wing and wherein the binder aligner can receive the binder so that the binder is approximately aligned along a longitudinal axis of the body.

3. An interspinous implant, comprising:

a first wing;

a central body extending from the first wing, said central body having a longitudinal axis;

a spacer positioned over said central body with said spacer being able to rotate about said longitudinal axis of said central body so as to be positionable relative to said central body in order to aid in positioning said implant between spinous processes;

a distraction guide extending from the central body;

a second wing selectably connectable with the distraction guide, the second wing including a capture device extending therefrom;

a binder adapted to be disposed around the spinous processes, the binder having an anchor end connected with the second wing and a length extending from the anchor end to be secured by the capture device.

4. The implant of claim 3, wherein the first wing is adapted to be positionable along first sides of the adjacent spinous processes and the second wing is adapted to be positionable along second sides of the spinous processes and opposite to the first wing.

5. The implant of claim 3, further comprising:

a binder aligner selectably connectable with the first wing and wherein the binder aligner can receive the binder so that the binder is approximately aligned along a longitudinal axis of the body.

6. The implant of claim 3, wherein said distraction guide includes a groove that can receive said second wing.

7. The implant of claim 3, wherein:

the capture device includes a first portion extending from the second wing, a second portion movably associated with the first portion, and a fastener; and

the binder is fixedly associated with the brace by adjusting the fastener so that the second portion is urged toward the second wing.

8. The implant of claim 3, wherein:

the capture device includes a spring-loaded cam biased against the second wing so that the second wing limits the rotation of the spring-loaded cam; and

the binder is disposed between the spring-loaded cam and the second wing.

9. A system selectably connectable with an implant adapted to be positioned between spinous processes and including a first wing and a body extending from the first wing, the system comprising:

a second wing;

a capture device extending from the second wing;

a binder adapted to be disposed around the spinous processes, the binder having an anchor end connected with the second wing and a length extending from the anchor end;

wherein the capture device can secure the binder along the length; and

wherein the second wing can be connected with the body.

10. The system of claim 9, further comprising:

a binder aligner adapted to receive the binder so that the binder is approximately aligned along a longitudinal axis of the body;

wherein the binder is adapted to be connected with the first wing.

11. The system of claim 9, wherein:

the body includes a spacer and a distraction guide; and

the second wing is adapted to be connected with one of the spacer and the distraction guide.

12. The system of claim 9, wherein:

the body includes a central body extending from the first wing, a distraction guide extending from the central body, and a spacer pivotably disposed over at least a portion of the central body; and

wherein the second wing can be connected with the distraction guide.

13. The system of claim 12, wherein:

the second wing includes an alignment tab; and

the distraction guide includes an alignment groove for receiving the alignment tab.

14. A method to immobilize vertebral bodies by immobilizing respective spinous processes extending therefrom, the method comprising:

using an implant including a spacer, a brace, and a first wing;

positioning the spacer between adjacent spinous processes;

connecting a second wing to the implant, wherein the second wing includes a capture device extending from the second wing,

positioning a binder connected with the second wing around adjacent spinous processes;

positioning the binder between the second wing and the capture device; and

adjusting the capture device to secure the binder between the capture device and the second wing.

15. The method of claim 14, wherein the capture device includes at least one cam adapted to secure the binder against the second wing.

16. The method of claim 15, wherein one or both of a surface of the at least one cam and the second wing is textured to resist slippage of the binder when secured.

17. The method of claim 15, wherein:

the at least one cam includes one or more cam lobes corresponding to one or more lobes disposed within the second wing; and

when the at least one cam is rotated, the binder is disposed between the one or more cam lobes and the one or more lobes of the second wing.

18. The method of claim 14, wherein:

the capture device includes a first spring-loaded cam and a second spring-loaded cam, the first and second spring-loaded cams being biased in opposition to one another and being positioned so that rotational motion of the first spring-loaded cam in a first direction is limited by the second spring-loaded cam and the rotational motion of the second spring-loaded cam in a second direction is limited by the first spring-loaded cam; and

the binder is secured by threading the binder between the first spring-loaded cam and the second spring-loaded cam.

19. The method of claim 18, wherein the first and second spring-loaded cams include texture to grip the binder.

20. The method of claim 14, wherein:

the capture device includes a spring-loaded cam biased against the second wing so that the second wing blocks the rotation of the spring-loaded cam in a first direction; and

the binder is secured by threading the binder between the spring-loaded cam and the second wing.