Adjustable spine distraction implant

Patent metadata

Field	Value
Publication number	US-9301788-B2
Application number	US-201113247664-A
Country	US
Kind code	B2
Filing date	Sep 28, 2011
Priority date	Apr 10, 2008
Publication date	Apr 5, 2016
Grant date	Apr 5, 2016

Abstract

An adjustable spine distraction implant alleviates pain associated with spinal stenosis and facet arthropathy by expanding the volume and/or cross sectional area in the spinal canal and/or neural foramen. The adjustable implant provides a spinal extension inhibitor. The implant includes elliptical or oval shaped adjustable member or spacer for positioning between and adjustably spacing apart the spinous processes.

First claim

What is claimed is:

1. An adjustable spinal implant comprising:
a body portion;
a first wing fixedly coupled to a first end of the body portion, wherein the first wing comprises a first central portion defining a first upper planar surface and a first lower planar surface being parallel to the body portion, a first upper extension extending from the first central portion to define a first upper offset portion such that a first upper space is formed between the first upper offset portion and the first upper planar surface of the first central portion in a first direction perpendicular to the first upper planar surface, and a first lower extension extending from the first central portion to define a first lower offset portion such that a first lower space is formed between the first lower offset portion and the first lower planar surface of the first central portion in a second direction perpendicular to the first lower planar surface; and
a second wing adjustably coupled to the body portion such that a distance between the first wing and the second wing is adjustable by a user, wherein the second wing comprises a second central portion defining a second upper planar surface and a second lower planar surface being parallel to the body portion, a second upper extension extending from the second central portion to define a second upper offset portion such that a second upper space is formed between the second upper offset portion and the second upper planar surface of the second central portion in the first direction perpendicular to the second upper planar surface, and a second lower extension extending from the second central portion to define a second lower offset portion such that a second lower space is defined between the second lower offset portion and the second lower planar surface of the second central portion in the second direction and perpendicular to the second lower planar surface;
wherein the first and second wings include inward facing surfaces configured to be positioned adjacent spinous processes of a patient, wherein each inward facing surface comprises a single recess extending over a substantial portion of the inward facing surface of the respective one of the first and second central portions both above and below the body portion, wherein the single recess is defined by an upstanding wall portion extending about a periphery of the single recess, and wherein the recess includes a bottom surface defining a substantially uniform depth;
wherein along the first direction, the first upper offset portion and the first upper planar surface define the first upper space, and the second upper offset portion and the second upper planar surface define the second upper space;
wherein along the second direction, the first lower offset portion and the first lower planar surface define the first lower space, and the second lower offset portion and the second lower planar surface define the second lower space; and
wherein the first upper offset portion is offset in an opposite direction from the first lower offset portion and wherein the second upper offset portion is offset is an opposite direction from the second lower offset portion.

2. The implant of claim 1 , wherein each of the body portion, the first wing, and the second wing includes at least one aperture configured to promote bone growth about the implant.

3. The implant of claim 1 , wherein the first upper extension extends superiorly and anteriorly from the first central portion, and the first lower extension extends inferiorly and posteriorly from the first central portion, and wherein the second upper extension extends superiorly and anteriorly from the second central portion, and the second lower extension extends inferiorly and posteriorly from the second central portion.

4. The implant of claim 3 , wherein each of the first upper extension, the first lower extension, the second upper extension, and the second lower extension comprises a plurality of projections extending from the inward facing surfaces of the first and second wings.

5. The implant of claim 1 , wherein the first upper extension extends superiorly and posteriorly from the first central portion, the first lower extension extends inferiorly and posteriorly from the first central portion, the second upper extension extends superiorly and posteriorly from the second central portion, and the second lower extension extending inferiorly and posteriorly from the second central portion.

6. The implant of claim 1 , further comprising a sacral support extending anteriorly and inferiorly from the body portion.

7. The implant of claim 6 , wherein the sacral support has an L-shape.

8. The implant of claim 1 , wherein the first upper extension and the first lower extension are adjustable relative to the first central portion; and wherein the second upper extension and the second lower extension are adjustable relative to the second central portion.

9. The implant of claim 8 , wherein the first upper extension and the first lower extension are adjustable relative to the first central portion in only a single direction, and wherein the second upper extension and the second lower extension are adjustable relative to the second central portion in only a single direction.

10. An adjustable spinal implant comprising:
a body portion comprising a pair of adjustable wedging members configured to interface with adjacent vertebral bodies;
a first wing fixedly coupled to a first end of the body portion, the first wing comprising a first inward facing surface configured to be positioned adjacent a spinous process and at least one first projection configured to extend at least partially into the spinous process, wherein the first wing comprises a first central portion defining a first upper planar surface and a first lower planar surface parallel to the body portion, a first upper extension extending superiorly and anteriorly from the first central portion to define a first upper offset portion such that a first upper space is formed between the first upper offset portion and the first upper planar surface of the first central portion in a first direction perpendicular to the first upper planar surface, and a first lower extension extending inferiorly and posteriorly from the first central portion to define a first lower offset portion such that a first lower space is formed between the first lower offset portion and the first lower planar surface of the first central portion in a second direction perpendicular to the first lower planar surface; and
a second wing coupled to the body portion, the second wing comprising a second inward facing surface configured to be positioned adjacent an opposite side of the spinous process from the first inward facing surface, the second wing further comprising at least one second projection configured to extend at least partially into the spinous process, wherein the second wing comprises a second central portion defining a second upper planar surface and a second lower planar surface parallel to the body portion, a second upper extension extending superiorly and anteriorly from the second central portion to define a second upper offset portion such that a second upper space is formed between the second upper offset portion and the second upper planar surface of the second central portion in the first direction, and a second lower extension extending inferiorly and posteriorly from the second central portion to define a second lower offset portion such that a second lower space is defined between the second lower offset portion and the second lower planar surface of the second central portion in the second direction;
wherein the body portion, the first wing, and the second wing each compris

Assignees

• Wolters Madeline C
• Butler Michael S
• Life Spine Inc

Inventors

• Wolters Madeline C
• Butler Michael S

Classifications

• A61B17/7055

  connected to sacrum, pelvis or skull · CPC title

• A61B17/7047

  Clamps comprising opposed elements which grasp one vertebra between them · CPC title

• A61B17/7068 Primary

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

• A61B2017/00858

  high friction or non-slip · CPC title

• A61B17/7064

  Devices acting on, attached to, or simulating the effect of, vertebral facets; Tools therefor · CPC title