Dynamized interspinal implant

Patent metadata

Field	Value
Publication number	US-9662148-B2
Application number	US-201615149085-A
Country	US
Kind code	B2
Filing date	May 7, 2016
Priority date	Mar 6, 2004
Publication date	May 30, 2017
Grant date	May 30, 2017

Abstract

An interspinous process having a narrowed distal portion.

First claim

We claim:

1. A method of treating a spinal condition, comprising:
implanting between adjacent vertebrae an implant comprising:
a) a body portion having an anterior end, a posterior end, an upper surface adapted to bear upon an upper vertebra, and a lower surface adapted to bear upon a lower vertebra,
b) upper and lower walls extending vertically from the respective upper and lower surfaces,
c) a bone gripping element extending substantially horizontally from each of the walls,

wherein the implant is implanted in an orientation whereby:
i) the body portion tapers towards the spinal cord, and
ii) the bone gripping elements extend substantially in the coronal plane to engage a lateral portion of each respective vertebra,

wherein a posterior surface of the upper wall and a posterior surface of the lower wall lie substantially in a common plane.

2. The method of claim 1 , wherein the body portion further comprises a sidewall comprising a laterally-facing recess.

3. The method of claim 1 , wherein the bone gripping elements extend over and below the body portion.

4. The method of claim 1 , wherein the upper and lower walls reside at a lateral side of the body portion.

5. The method of claim 1 , wherein the body portion tapers substantially continuously from a first end to a second end.

6. The method of claim 1 , wherein the bone gripping elements each terminate in a pointed tip.

7. The method of claim 1 , wherein the bone gripping elements each comprise a feature adapted to resist pullout.

8. The method of claim 1 , wherein the upper and lower surfaces of the implant are non-parallel.

9. The method of claim 1 , wherein implanting the implant results in a restriction of the motion of the adjacent vertebrae.

10. The method of claim 1 , further comprising a cavity between the upper and lower surfaces of the implant.

11. The method of claim 1 , wherein a length of the implant is at least twice a width of the implant.

12. The method of claim 1 , wherein a length of the implant is at least three times a width of the implant.

13. The method of claim 1 ,
further comprising providing an electric current.

Assignees

• Depuy Synthes Products Inc

Inventors

• Serhan Hassan
• Dinello Alexander Michel
• Christianson William

Classifications

• A61B17/7068

  Devices comprising separate rigid parts, assembled in situ, to bear on each side of spinous processes; Tools therefor · CPC title

• A61B2017/567

  Joint mechanisms or joint supports in addition to the natural joints and outside the joint gaps · CPC title

• A61B2017/00075

  Motion · CPC title

• A61B17/7065 Primary

  Devices with changeable shape, e.g. collapsible or having retractable arms to aid implantation; Tools therefor · CPC title

• A61B17/7062 Primary

  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 title