Apparatus and method of treating spinous processes

Patent metadata

Field	Value
Publication number	US-2016228157-A1
Application number	US-201514935276-A
Country	US
Kind code	A1
Filing date	Nov 6, 2015
Priority date	Nov 6, 2014
Publication date	Aug 11, 2016
Grant date	—

Abstract

An interspinous process device includes a first plate, a second plate, and a transverse member between the first plate and the second plate, wherein the second plate is adjustably coupled to the transverse member. A post is coupled to the transverse member and a spring mechanism is disposed between the post and the first plate. The spring mechanism is configured to provide a preloaded compression force to the first and second plates. Methods of implanting the interspinous process device using an inserter tool are also disclosed.

First claim

What is claimed is:

1 . An interspinous process device comprising:
a first plate comprising a through hole; a second plate comprising an aperture; a transverse member disposed between the first plate and the second plate, wherein the transverse member is configured to fit through the aperture of the second plate and the second plate is adjustably securable to the transverse member; a post disposed through the hole in the first plate and coupled to the transverse member; and a spring mechanism disposed between the post and the first plate, the spring mechanism configured to provide a preloaded force to the first plate.

2 . The device of claim 1 , wherein the spring mechanism is comprised of at least one beveled washer.

3 . The device of claim 1 , wherein the spring mechanism is comprised of a helical spring.

4 . The device of claim 1 , wherein the spring mechanism is comprised of an elastomeric material.

5 . An interspinous process device comprising:
a first plate; a second plate; a transverse member between the first plate and the second plate, wherein the second plate is adjustably coupled to the transverse member; and a spring mechanism configured to provide a preloaded compression force to the first and second plates.

6 . The device of claim 5 , further comprising a post coupled to the transverse member, wherein the spring mechanism is disposed between the post and first plate.

7 . The device of claim 5 , further comprising a fastener on the second plate that tightens on the transverse member.

8 . The device of claim 5 , wherein the first plate and the second plate have a plurality of spikes configured to engage bone.

9 . The device of claim 5 , wherein a first surface of the transverse member has an angle with respect to a second opposite surface of the transverse member.

10 . The device of claim 9 , wherein the angle is at least approximately 0.1 degree and/or less than or equal to approximately 7 degrees.

11 . The device of claim 9 , wherein the angle is at least approximately 0.1 degree and/or less than or equal to approximately 3 degrees.

12 . The device of claim 9 , wherein the angle is approximately 0.7 degree.

13 . The device of claim 5 , wherein the spring mechanism is comprised of at least one beveled washer.

14 . The device of claim 5 , wherein the spring mechanism is comprised of a helical spring.

15 . The device of claim 5 , wherein the spring mechanism is comprised of an elastomeric material.

16 . The device of claim 5 , wherein at least a portion of the device has a coating made of one or more of titanium and hydroxylapatite.

17 . A method of implanting an interspinous process device, comprising:
delivering an assembly between a superior spinous process and an inferior spinous process, the assembly comprising a first plate, a spring mechanism and a transverse member coupled to the first plate, wherein the assembly is delivered laterally such that the transverse member is inserted in the interspinous space and the first plate is adjacent a first side of the spinous processes; delivering a second plate to a second side of the spinous processes and mounting the second plate to the transverse member; applying a preload to the spring mechanism; compressing the first plate and the second plate together while applying the preload to the spring mechanism; and actuating a fastener to lock the second plate to the transverse member.

18 . The method of claim 17 , wherein the transverse member is inserted in the interspinous space in a first orientation and then rotated to a second orientation.

19 . A method of implanting an interspinous process device, comprising:
delivering an assembly between a superior spinous process and an inferior spinous process, the assembly comprising a first plate, a second plate, a spring mechanism and a transverse member coupled to the first plate and the second plate, wherein the assembly is delivered from a posterior approach in a first orientation; rotating the assembly in the implant site to a second orientation; applying a preload to the spring mechanism; compressing the first plate and the second plate together while applying the preload to the spring mechanism; and actuating a fastener to lock the second plate to the transverse member.

20 . The method of claim 19 , wherein when the assembly is rotated to the second orientation, the spinous processes are distracted.

Assignees

• Spinal Elements Inc

Inventors

• Shoshtaev Eugene
• Monterroso Roberto
• Blain Jason
• Samuel Forrest

Classifications

• A61B2017/564

  Methods for bone or joint treatment · 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

• A61B2017/7073

  with intervertebral connecting element crossing an imaginary spinal median surface · CPC title

• A61B2017/681

  Alignment, compression, or distraction mechanisms · CPC title

• A61B17/7062

  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