Expandable spinal interbody assembly

Patent metadata

Field	Value
Publication number	US-2018296361-A1
Application number	US-201816009616-A
Country	US
Kind code	A1
Filing date	Jun 15, 2018
Priority date	Mar 13, 2013
Publication date	Oct 18, 2018
Grant date	—

Abstract

An expandable implant includes a top support assembly defining an upper surface configured to engage a first portion of bone, a first central aperture extending from the upper surface to an interior of the implant, and a first grid structure surrounding the first central aperture; a bottom support assembly defining a lower surface configured to engage a second portion of bone, a second central aperture extending from the lower surface to the interior, and a second grid structure surrounding the second central aperture; and a control assembly coupled to the top support assembly and the bottom support assembly and configured to control relative movement between the top support assembly and the bottom support assembly between a collapsed position and an expanded position.

First claim

What is claimed is:

1 . An expandable implant, comprising:
a top support assembly defining an upper surface configured to engage a first portion of bone, a first central aperture extending from the upper surface to an interior of the implant, and a first grid structure surrounding the first central aperture; a bottom support assembly defining a lower surface configured to engage a second portion of bone, a second central aperture extending from the lower surface to the interior, and a second grid structure surrounding the second central aperture; and a control assembly coupled to the top support assembly and the bottom support assembly and configured to control relative movement between the top support assembly and the bottom support assembly between a collapsed position and an expanded position.

2 . The expandable implant of claim 1 , wherein the first grid structure includes a first plurality of apertures extending from the upper surface toward the interior, and the second grid structure includes a second plurality of apertures extending from the lower surface toward the interior.

3 . The expandable implant of claim 2 , wherein the first plurality of apertures extend partially through the top support assembly and the second plurality of apertures extend partially through the bottom support assembly.

4 . The expandable implant of claim 1 , wherein the first grid structure forms a series of grooves and teeth on the upper surface and the second grid structure forms a series of grooves and teeth on the lower surface.

5 . The expandable implant of claim 1 , wherein the top support assembly includes at least one upper side portion defining an upper web structure and the bottom support assembly includes at least one lower side portion defining a lower web structure.

6 . The expandable implant of claim 5 , wherein the upper web structure defines a first plurality of voids and the lower web structure defines a second plurality of voids.

7 . The expandable implant of claim 6 , wherein at least a portion of the first plurality of voids and at least a portion of the second plurality of voids extend from an exterior of the implant to the interior.

8 . The expandable implant of claim 5 , wherein the upper web structure and the lower web structure each form multiple web structures having honeycomb patterns.

9 . The expandable implant of claim 1 , wherein the upper support assembly and the lower support assembly are each formed by a single 3D printing operation.

10 . The expandable implant of claim 1 , wherein the upper support assembly and the lower support assembly are made of a titanium alloy.

11 . An expandable implant comprising:
a top support assembly defining an upper surface and an upper side portion, the upper surface configured to engage a first portion of bone, the upper side portion including an upper web structure defining a first plurality of voids in the upper side portion; a bottom support assembly defining a lower surface and a lower side portion, the lower surface configured to engage a second portion of bone, the lower side portion including a lower web structure defining a second plurality of voids in the lower side portion; a first wedge member slidably coupled to the top and bottom support assemblies; a second wedge member slidably coupled to the top and bottom support assemblies; and a control assembly coupled to the first and second wedge members and configured to control relative movement between the top support assembly and the bottom support assembly between a collapsed position and an expanded position.

12 . The expandable implant of claim 11 , wherein at least a portion of the first plurality of voids and at least a portion of the second plurality of voids extend from an exterior of the implant to the interior.

13 . The expandable implant of claim 12 , wherein the upper web structure and the lower web structure each form multiple web structures having honeycomb patterns.

14 . The expandable implant of claim 11 , wherein the top support assembly includes a first central aperture extending from the upper surface to an interior of the implant, and a first grid structure surrounding the first central aperture, and wherein the bottom support assembly includes a second central aperture extending from the lower surface to the interior, and a second grid structure surrounding the second central aperture.

15 . The expandable implant of claim 14 , wherein the first grid structure includes a first plurality of apertures extending from the upper surface toward the interior, and the second grid structure includes a second plurality of apertures extending from the lower surface toward the interior.

16 . The expandable implant of claim 2 , wherein the first plurality of apertures extend partially through the top support assembly and the second plurality of apertures extend partially through the bottom support assembly.

17 . The expandable implant of claim 1 , wherein the first grid structures for a series of grooves and teeth on the top surface and the second grid structure forms a series of grooves and teeth on the lower surface.

18 . An expandable implant, comprising:
a top support assembly including:
an upper surface configured to engage a first portion of bone;
a first central aperture extending from the upper surface to an interior of the implant;
a first grid structure surrounding the first central aperture; and
at least one side portion extending downward from the upper surface and defining an upper web structure;
a bottom support assembly including:
a lower surface configured to engage a second portion of bone;
a second central aperture extending from the lower surface to the interior;
a second grid structure surrounding the second central aperture; and
at least one lower side portion extending upward from the lower surface and defining a lower web structure; and
a control assembly coupled to the top support assembly and the bottom support assembly and configured to control relative movement between the top support assembly and the bottom support assembly between a collapsed position and an expanded position.

19 . The expandable implant of claim 18 , wherein the first grid structure includes a first plurality of apertures extending from the upper surface toward the interior, and the second grid structure includes a second plurality of apertures extending from the lower surface toward the interior.

20 . The expandable implant of claim 19 , wherein the first plurality of apertures extend partially through the top support assembly and the second plurality of apertures extend partially through the bottom support assembly.

Assignees

• Life Spine Inc

Inventors

• Butler Michael S
• Wolters Madeline
• Predick Daniel

Classifications

• A61F2002/30784

  Plurality of holes · CPC title

• A61F2/447 Primary

  substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section · CPC title

• A61F2002/30158

  trapezoidal · CPC title

• A61F2002/30179

  X-shaped · CPC title

• A61F2002/30841

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