Interspinous process implant

Patent metadata

Field	Value
Publication number	US-11534310-B2
Application number	US-202217677677-A
Country	US
Kind code	B2
Filing date	Feb 22, 2022
Priority date	Aug 20, 2020
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

Abstract

A system and method for providing a spinal implant having a main body, a proximal anchor, a distal anchor, and an internal plunger. The proximal anchor comprises a nut having an internal bore. The distal anchor comprises a plurality of wings having a first closed configuration and a second open configuration. The internal plunger is housed within a central bore of the main body. The distal end of the internal plunger is operatively connected to the first wing and the second wing to selectively move the wings between the first closed configuration and the second open configuration, and vice versa.

First claim

Having thus described various embodiments of the invention, what is claimed as new and desired to be protected by Letters Patent includes the following:

1. A spinal implant comprising:
a main body having a central bore and a longitudinal axis extending between a proximal end and a distal end;
a proximal anchor comprising a nut received on an outer surface of the main body;
a distal anchor having a first closed configuration and a second open configuration, said distal anchor comprising: a first wing having a first inner end and a first outer end, and a second wing having a second inner end and a second outer end, wherein said first inner end of the first wing is pivotably connected to said second inner end of the second wing at a first pivot point; and
an internal plunger having a proximal end and a distal end, said internal plunger housed within the central bore of the main body, said distal end of the internal plunger pivotably connected to both a proximal end of a first linkage and a proximal end of a second linkage at a second pivot point,
wherein a distal end of said first linkage is pivotably connected to the distal anchor at a third pivot point located near the first inner end of the first wing, wherein a first distance between the first pivot point and the third pivot point is less than a second distance between the second pivot point and the third pivot point, and a distal end of said second linkage is pivotably connected to the distal anchor at a fourth pivot point located near the second inner of the second wing, wherein a third distance between the first pivot point and the fourth pivot point is less than a fourth distance between the second pivot point and the fourth pivot point; and
wherein longitudinal distal movement of the internal plunger (i) pivots the first outer end of the first wing and the second outer end of the second wing distally about the first pivot point and (ii) pivots the first linkage and the second linkage proximally about the second pivot point, to transition from the first closed configuration to the second open configuration, and wherein longitudinal proximal movement of the internal plunger (iii) pivots the first wing and the second wing proximally about the first pivot point and (iv) pivots the first linkage and the second linkage distally about the second pivot point, to transition from the second open configuration to the first closed configuration.

2. The spinal implant of claim 1 , wherein the second open configuration comprises the third pivot point and the fourth pivot point being located at a longitudinally distal position relative to the first pivot point.

3. The spinal implant of claim 2 , wherein the first wing comprises a first slot on an inner surface for receiving a first medial portion of the first linkage therein, the first medial portion disposed between the second pivot point and the third pivot point, and the second wing comprises a second slot on an inner surface for receiving a second medial portion of the second linkage therein, the second medial portion disposed between the second pivot point and the fourth pivot point.

4. The spinal implant of claim 1 , wherein in the first closed configuration, a maximum cross-sectional width of the distal anchor is less than a cross-sectional width of the main body.

5. The spinal implant of claim 4 , wherein the first wing and the second wing form an angle of 60 degrees, or an angle of 80 degrees to 90 degrees with respect to the main body in the second open configuration.

6. The spinal implant of claim 1 , wherein the distal end of the internal plunger comprises:
a first arm, a second arm, and a space between the first arm and the second arm,
wherein the proximal end of the first linkage and the proximal end of the second linkage are mounted in the space between the first arm and the second arm of the internal plunger.

7. The spinal implant of claim 1 , wherein the first linkage and the second linkage respectively comprise at least one of: a concave curved bottom edge or a concave curved top edge.

8. The spinal implant of claim 1 , wherein:
the first wing comprises a first planar top surface and a first base surface at the first inner end, the first planar top surface extending at an angle of 35 to 45 degrees relative to the first base surface; and/or
the second wing comprises a second planar top surface and a second base surface at the second inner end, the second planar top surface extending at an angle of 35 to 45 degrees relative to the second base surface.

9. The spinal implant of claim 8 , wherein in the first closed configuration, (i) the third pivot point and the fourth pivot point are respectively located between a longitudinally distal portion of the first planar top surface and a longitudinally distal position of the second planar top surface, and (ii) the second pivot point is located between a longitudinally proximal portion of the first planar top surface and a longitudinally proximal portion of the second planar top surface.

10. The spinal implant of claim 1 , wherein:
in the second open configuration, the second pivot point is located at a longitudinally proximal position relative to the first wing and the second wing, and
the first linkage and the second linkage form an angle of 45 degrees in the second open configuration, and/or the first linkage and the second linkage form an angle of 25 degrees in the first closed configuration.

11. The spinal implant of claim 1 , wherein in the first closed configuration, the first outer end of the first wing and the second outer end of the second wing are located at a longitudinally proximal position relative to the second pivot point, and in the second open configuration, the first outer end of the first wing and the second outer end of the second wing are located at a longitudinally distal position relative to the second pivot point.

12. The spinal implant of claim 1 , wherein:
the first linkage and the second linkage form an angle of 35 degrees in the second open configuration; and/or
the first linkage and the second linkage form an angle of 85 degrees in the second open configuration.

13. The spinal implant of claim 1 , wherein at least one of the first outer end of the first wing or the second outer end of the second wing respectively comprises at least one pointed protrusion adapted to engage tissue or bone.

14. The spinal implant of claim 1 , wherein a distal side of the nut comprises a textured surface adapted to engage tissue or bone.

15. A method of placing a spinal implant at a treatment site comprising:
providing a spinal implant in a first closed configuration, said spinal implant comprising:
a main body having a central bore and a longitudinal axis extending between a proximal end and a distal end;
a proximal anchor comprising a nut received on an outer surface of the main body;
a distal anchor comprising: a first wing having a first inner end and a first outer end, and a second wing having a second inner end and a second outer end, wherein said first inner end of the first wing is pivotably connected to said second inner end of the second wing at a first pivot point; and
an internal plunger having a proximal end and a distal end, said internal plunger housed within the central bore of the main body, said distal end of the internal plunger pivotably connected to both a proximal end of a first linkage and a proximal end of a second linkage at a second pivot point,

wherein a distal end of said first linkage is pivotably connected to the distal anchor at a third pivot point located near the first inner end of the first wing, wherein a first

Assignees

• Spinal Simplicity Llc

Inventors

• Frock Melissa
• Frock Adam
• Moseley Todd
• Rogers Adam
• Slover Jeff

Classifications

• A61F2002/30957

  using a positive or a negative model, e.g. moulds · CPC title

• A61F2002/30985

  using three dimensional printing [3DP] · CPC title

• A61F2310/00796

  Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite · CPC title

• A61F2002/30841

  Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes · CPC title

• A61F2310/00023

  Titanium or titanium-based alloys, e.g. Ti-Ni alloys · CPC title