Interspinous process implant and fusion cage spacer

Patent metadata

Field	Value
Publication number	US-9907581-B2
Application number	US-201615085687-A
Country	US
Kind code	B2
Filing date	Mar 30, 2016
Priority date	Mar 13, 2009
Publication date	Mar 6, 2018
Grant date	Mar 6, 2018

Abstract

A spinal implant includes an elongated body dimensioned and configured to function as a spacer, for placement in a target interspinous process space, between two adjacent spinous processes, a distal anchor associated with a distal end of the body, and a proximal anchor mounted for longitudinal movement along the body between a first position spaced apart from the head and a second position approximated with the head, adapted to compress the two adjacent spinous processes, in conjunction with the distal anchor.

First claim

What is claimed is:

1. A spinal implant comprising:
a) an elongated body dimensioned and configured to function as a spacer, for placement in a target interspinous process space, between two adjacent spinous processes and having a longitudinal axis extending therethrough;
b) a distal anchor associated with a distal end portion of the body for engaging adjacent spinous processes including two radially deployable blades adapted to engage two adjacent spinous processes wherein the two radially deployable blades are mounted to transition from a stowed position within an internal chamber of the elongated body and a deployed position projecting radially outward; and
c) a proximal anchor mounted for longitudinal movement along the body between a first position spaced apart from the distal end portion of the body and a second position approximated with the distal end portion of the body, the proximal anchor adapted to engage the two adjacent spinous processes in conjunction with the distal anchor, wherein the proximal anchor includes an axially slideable plate and a nut for axial movement of the proximal anchor by rotational movement of the nut.

2. The spinal implant of claim 1 , wherein the axially slideable plate is between the nut and the distal anchor axially, and wherein a threaded outer surface of the body includes at least one flat portion engaged with a corresponding flat portion formed in a central hole of the axially slideable plate for inhibiting relative rotation of the axially slideable plate and the body.

3. The spinal implant of claim 1 , wherein the distal anchor includes a tapered head.

4. The spinal implant of claim 3 , wherein the tapered head has a plurality of circumferentially spaced apart proximally facing spikes for engaging the spinous processes when the head and the anchor are approximated.

5. The spinal implant of claim 3 , wherein the tapered head has a trailing skirt section adapted and configured for movement between a radially expanded condition a radially compressed condition as the head is inserted between the two adjacent spinous processes.

6. The spinal implant of claim 3 , wherein the trailing skirt section of the head includes a plurality of circumferentially spaced apart hinged pleats that are biased into said radially expanded condition.

7. The spinal implant as recited in claim 3 , wherein the pleats are biased by spring elements.

8. The spinal implant as recited in claim 3 , wherein the internal chamber of the elongated body is packed with osteogenesis-promoting substances configured to facilitate bone ingrowth and fusion.

9. A spinal implant comprising:
a) an elongated body dimensioned and configured to function as a spacer, for placement in a target interspinous process space, between two adjacent spinous processes, the body having a longitudinal axis extending therethrough and a tapered head portion configured to gradually distract the two adjacent spinous processes during insertion therebetween wherein an outer surface of the body, including the tapered head portion, is threaded;
b) a distal anchor associated with a distal end portion of the body for engaging the two adjacent spinous processes including two radially deployable blades adapted to engage two adjacent spinous processes wherein the two radially deployable blades are mounted to transition from a stowed position within an internal cavity of the elongated body and a deployed position projecting radially outward; and
c) a proximal anchor mounted for longitudinal movement along the body between a first position spaced apart from the tapered head portion and a second position approximated with the tapered head portion, wherein the proximal anchor includes an axially slideable plate for engaging the spinous processes.

Assignees

• Spinal Simplicity Llc

Inventors

• Hess Harold
• Frock Melissa
• Moseley Todd

Classifications

• A61B17/00234

  for minimally invasive surgery (A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence) · CPC title

• A61B17/7065

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

• A61B2017/564

  Methods for bone or joint treatment · CPC title

• A61F2/4465

  having a circular or kidney shaped cross-section substantially perpendicular to the axis of the spine · CPC title