Expandable implant assembly with modular endplates

Patent metadata

Field	Value
Publication number	US-2024341975-A1
Application number	US-202418637048-A
Country	US
Kind code	A1
Filing date	Apr 16, 2024
Priority date	Apr 17, 2023
Publication date	Oct 17, 2024
Grant date	—

Abstract

An expandable implant assembly includes an upper endplate assembly, a lower endplate assembly, and a control assembly. The upper endplate assembly is configured to engage bone and includes an upper base member and a plurality of upper endplates. Each of the plurality of upper endplates is coupleable to the base member. The lower endplate assembly is configured to engage bone and includes a lower base member and a plurality of lower endplates. Each of the plurality of lower endplates is coupleable to the base member. The control assembly is configured to couple the upper endplate assembly to the lower endplate assembly and control movement of the upper endplate assembly relative to the lower endplate assembly.

First claim

What is claimed is:

1 . An expandable implant assembly, comprising:
an upper endplate assembly configured to engage bone, the upper endplate assembly comprising:
an upper base member;
a plurality of upper endplates, wherein each of the plurality of upper endplates is selectively coupleable to the upper base member;
a lower endplate assembly configured to engage bone, the lower endplate assembly comprising:
a lower base member;
a plurality of lower endplates, wherein each of the plurality of lower endplates is selectively coupleable to the lower base member; and
a control assembly configured to couple the upper endplate assembly to the lower endplate assembly and control movement of the upper endplate assembly relative to the lower endplate assembly.

2 . The assembly of claim 1 , wherein each of the upper endplates is different from the remainder of the upper endplates in at least one of a height, width, material, and an angulation.

3 . The assembly of claim 2 , wherein each of the lower endplates is different from the remainder of the lower endplates in at least one of a height, width, material, and an angulation.

4 . The assembly of claim 1 , wherein the upper base member comprises a first graft window, and wherein at least one of the plurality of upper endplates comprises a second graft window configured to be aligned with the first graft window when the at least one of the plurality of upper endplates is coupled to the upper base member.

5 . The assembly of claim 4 , wherein the at least one of the plurality of upper endplates comprises a columnar structure defining the second graft window and extending into the first graft window.

6 . The assembly of claim 5 , wherein the columnar structure comprises a first securement feature configured to engage a second securement feature provided on the upper base member to secure the upper endplate to the upper base member.

7 . The assembly of claim 1 , wherein at least one of the plurality of upper endplates or plurality of lower endplates is 3D printed.

8 . The assembly of claim 7 , wherein the at least one of the plurality of upper endplates is a porous structure intended to facilitate bone growth in and/or around the upper endplate.

9 . The assembly of claim 1 , wherein each of the upper endplates and each of the lower endplates includes a projection configured to engage ridges in the base members in a snap-fit engagement.

10 . The assembly of claim 1 , wherein at least one of the plurality of upper endplates or plurality of lower endplates comprises asymmetrical apertures.

11 . The assembly of claim 1 , wherein at least one of the plurality of upper endplates or plurality of lower endplates comprises a non-planar lower surface configured to provide gaps between the respective endplate and base member.

12 . The assembly of claim 1 , wherein the upper base member comprises a lip on the distal end such that during insertion of the assembly the lip forms a leading edge for one of the plurality of upper endplates coupled to the upper base member.

13 . The assembly of claim 1 , wherein the control assembly comprises:
a proximal wedge member configured to engage the proximal ends of the upper and lower endplate assemblies; a distal wedge member configured to engage distal ends of the upper and lower endplate assemblies; and a control shaft coupled to the proximal and distal wedge members such that manipulation of the control shaft adjusts the distance between the proximal and distal wedge assemblies and a height of the expandable implant assembly.

14 . An expandable implant assembly, comprising:
a first endplate assembly configured to engage bone, the first endplate assembly comprising:
a first base member;
a first modular endplate coupled to the first base member;
a second endplate assembly configured to engage bone, the second endplate assembly comprising:
a second base member;
a second modular endplate coupled to the second base member; and
a control assembly configured to couple the first endplate assembly to the second endplate assembly and control movement of the first endplate assembly relative to the second endplate assembly.

15 . The assembly of claim 14 , wherein the first base member includes an interior wall defining a first graft window and the first end plate includes a projection defining a second graft window, wherein the projection engages a ridge on the interior wall in a snap fit engagement.

16 . The assembly of claim 14 , wherein the first base member includes an interior wall defining a first graft window and a projection extending from the interior wall into the first graft window and the first end plate includes a protrusion extending from the first end plate, wherein the projection engages the protrusion in a snap fit engagement.

17 . The assembly of claim 16 , wherein at least one of the first base member or the first modular endplate is 3D-printed.

18 . The assembly of claim 16 , wherein the protrusion is a hook and wherein the projection deflects as the projection engages the hook.

19 . A method of configuring an implant, comprising:
selecting an upper endplate from a plurality of upper endplates; selecting a lower endplate from a plurality of lower endplates; coupling the upper endplate to an upper base member and coupling the lower endplate to a lower base member to form an implant, the implant comprising:
an upper endplate assembly comprising the upper endplate and the upper base member;
a lower endplate assembly comprising the lower endplate and the lower base member; and
a control assembly operatively coupling the upper plate assembly to the lower plate assembly and configured to control relative movement between the upper endplate assembly and the lower endplate assembly.

20 . The method of claim 19 , wherein coupling the upper endplate to the upper base member comprises a projection of the upper endplate engaging a ridge in the upper base member in a snap-fit engagement.

Assignees

• Life Spine Inc

Inventors

• Predick Daniel

Classifications

• A61F2002/3093

  for promoting ingrowth of bone tissue · CPC title

• A61F2002/3092

  having an open-celled or open-pored structure · CPC title

• A61F2002/30784

  Plurality of holes · CPC title

• A61F2002/30736

  Augments or augmentation pieces, e.g. wedges or blocks for bridging a bone defect · CPC title

• A61F2002/30538

  for adjusting angular orientation · CPC title