Expandable implant assembly with compression features

Patent metadata

Field	Value
Publication number	US-2022296385-A1
Application number	US-202217836170-A
Country	US
Kind code	A1
Filing date	Jun 9, 2022
Priority date	Jun 10, 2019
Publication date	Sep 22, 2022
Grant date	—

Abstract

An expandable implant includes a base member, an adjustable member adjustably coupled to the base member and movable between a first, collapsed position, and a second, expanded position, a control assembly including a control shaft, wherein manipulation of the control shaft causes relative movement of the adjustable member relative to the base member, wherein the base member and the adjustable member are coupled together at least in part via the control assembly such that the control shaft is rotationally fixed relative to the base member and the adjustable member, and the adjustable member is resiliently compressible relative to the base member.

First claim

What is claimed is:

1 . An expandable implant comprising:
a first support configured to engage a first portion of bone; a second support configured to engage a second portion of bone, the second support adjustably coupled to the first support such that the expandable implant is movable between a collapsed position, and an expanded position; and a control assembly including a control shaft and a wedging member coupled to the control shaft, wherein manipulation of the control shaft causes relative movement of the second support relative to the first support; wherein the wedging member is configured to slidably engage the second support at a wedging member interface during manipulation of the control shaft to move the second support relative to the first support, wherein the wedging member interface comprises an elastically compressible portion defining a planar surface.

2 . The expandable implant of claim 1 , wherein the wedging member comprises the wedging member interface.

3 . The expandable implant of claim 1 , wherein the planar surface is angled relative to a direction of movement of the second support relative to the first support.

4 . The expandable implant of claim 1 , wherein the elastically compressible portion is configured to compress when the expandable implant is subjected to compressive loads via the first and second supports.

5 . The expandable implant of claim 1 , wherein the elastically compressible portion is made of PEEK.

6 . The expandable implant of claim 1 , wherein the wedging member interface is a first wedging member interface and the elastically compressible portion is a first elastically compressible portion configured to engage a first portion of the second support,
further comprising a second wedging member interface comprising a second elastically compressible portion defining a second planar surface configured to slidingly engage a second portion of the second support.

7 . The expandable implant of claim 1 , wherein the elastically compressible portion is coupled to a base portion of the wedging member, and wherein the elastically compressible portion is relatively more compressible than the base portion.

8 . The expandable implant of claim 7 , wherein the base portion is made of metal.

9 . The expandable implant of claim 1 , wherein the wedging member interface is configured such that an overall compressibility of the expandable implant imitates the compressibility of the human anatomy.

10 . An expandable implant, comprising:
a lower support; an upper support adjustably coupled to the lower support such that the expandable implant is movable between a collapsed position and an expanded position; and a control assembly including a control shaft, a first control member coupled to the control shaft, and a second control member coupled to the control shaft, wherein manipulation of the control shaft causes relative movement of the upper support relative to the lower support; wherein the first control member comprises a first compressible portion configured to slidingly engage a first portion of the upper support, and the second control member comprises a second compressible portion configured to slidingly engage a second portion of the upper support.

11 . The expandable implant of claim 10 , wherein the first control member comprises a first rigid portion coupled to the first compressible portion, the first rigid portion being relatively less compressible than the first compressible portion.

12 . The expandable implant of claim 10 , wherein the first compressible portion is configured to slidingly engage the first portion of the upper support upon rotation of the control shaft.

13 . The expandable implant of claim 10 , wherein the first compressible portion and the second compressible portion are more compressible than a remainder of the expandable implant.

14 . The expandable implant of claim 10 , wherein the first compressible portion defines a first planar surface configured to slidingly engage the first portion of the upper support and the second compressible portion defines a second planar surface configured to slidingly engage the second portion of the upper support.

15 . The expandable implant of claim 14 , wherein the first and second planar surfaces are angled relative to a direction of movement of the upper support relative to the lower support.

16 . An expandable implant, comprising:
a first support member; a second support member coupled to the first support member and movable relative to the first support member along a first direction; and a control assembly comprising a control shaft, a first control member coupled to the control shaft, and a second control member coupled to the control shaft, wherein the first control member comprises a first elastically compressible portion configured to slidingly engage a first portion of the second support member along a first interface angled relative to the first direction, and wherein the second control member comprises a second elastically compressible portion configured to slidingly engage a second portion of the second support member along a second interface angled relative to the first direction.

17 . The expandable implant of claim 16 , wherein the first control member comprises a first rigid portion coupled to the first elastically compressible portion; and
wherein the second control member comprises a second rigid portion coupled to the second elastically compressible portion.

18 . The expandable implant of claim 17 , wherein the first elastically compressible portion and the second elastically compressible portion are made of PEEK.

19 . The expandable implant of claim 16 , wherein the first support member comprises a first alignment portion and the second support member comprises a second alignment portion configured to engage the first alignment portion and maintain alignment between the first support member and the second support member during movement of the first support member relative to the second support member.

20 . The expandable implant of claim 16 , wherein the first elastically compressible portion defines a first planar surface configured to slidingly engage the first portion of the second support member and the second elastically compressible portion defines a second planar surface configured to engage the second portion of the second support member.

Assignees

• Life Spine Inc

Inventors

• Predick Daniel
• Wolters Madeline
• Butler Michael S

Classifications

• A61F2002/30387

  Dovetail connection · CPC title

• A61F2002/30594

  slotted, e.g. radial or meridian slot ending in a polar aperture, non-polar slots, horizontal or arcuate slots · CPC title

• A61F2002/30014

  differing in elasticity, stiffness or compressibility · CPC title

• A61F2002/30828

  parallel · CPC title

• A61F2002/30579

  with mechanically expandable devices, e.g. fixation devices · CPC title