US 10,537,435 B2Granted

Self-distracting cage

AssigneeDePuy Synthes Products, Inc.

InventorsNaren Renganath, Steve Connolly, Michael A. Fisher, Glen Arthur Presbrey

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Abstract

Various spinal implants and methods for stabilizing the spine are provided. In one exemplary embodiment, a spinal implant is provided having an expandable container with an interior volume that is selectively expandable between a compressed condition and an expanded condition. The expandable container is coupled to a superior endplate member having a bone-contacting surface and an engagement surface effective to mate with a superior surface of the expandable container, and an inferior endplate member having a bone-contacting surface and an engagement surface effective to mate with an inferior surface of the expandable container. In addition, at least one inlet port is formed in the expandable container and is effective to communicate a fluid to at least one cavity disposed within the interior volume of the expandable container.

Claims18

Dependent claims

A spinal implant, comprising:

a superior endplate having a superior bone contacting surface and an inferior engagement surface;
an inferior endplate having an inferior bone contacting surface and a superior engagement surface;
an expandable articulating pleated member that extends between the superior and inferior endplates and is mated to the engagement surfaces of the superior and inferior endplates, the expandable articulating pleated member being selectively expandable between a compressed condition and an expanded condition, the expandable articulating pleated member having a sidewall with an inward-facing surface, an outward-facing surface, and an interior volume disposed within the sidewall between the inward-facing and outward-facing surfaces, the interior volume having at least one chamber for holding a fluid;
a thru-hole that extends from the superior surface of the superior endplate, through a central opening of the expandable articulating pleated member, to the inferior surface of the inferior endplate;
an expandable balloon configured to receive an expansion material and placed within the central opening of the expandable articulating pleated member;
and
an inlet port effective to communicate the expansion material into the expandable balloon;
wherein delivery of the expansion material through the inlet port and into the expandable balloon increases a distance between the superior and inferior endplates and thereby increases a height of the expandable articulating pleated member;
wherein the spinal implant is filled with a fusion promoting material;
and
wherein the inlet port extends through the outward-facing surface and the inward-facing surface of the articulating pleated member.

8 more elements

A spinal implant, comprising:

a superior endplate having a superior bone contacting surface and an inferior engagement surface;
an inferior endplate having an inferior bone contacting surface and a superior engagement surface;
an expandable articulating pleated member that extends between the superior and inferior endplates and is mated to the engagement surfaces of the superior and inferior endplates, the expandable articulating pleated member being selectively expandable between a compressed condition and an expanded condition, the expandable articulating pleated member having a sidewall with an inward-facing surface, an outward-facing surface, and an interior volume disposed within the sidewall between the inward-facing and outward-facing surfaces, the interior volume having at least one internal chamber for holding a volume of a fluid;
a thru-hole that extends from the superior surface of the superior endplate, through a central opening of the expandable articulating pleated member, to the inferior surface of the inferior endplate;
an expandable balloon configured to receive an expansion material and placed within the central opening of the expandable articulating pleated member, and
multiple inlet ports effective to communicate the fluid to the at least one internal chamber of the expandable articulating pleated member and to communicate the expansion material into the expandable balloon,
wherein delivery of the expansion material through at least one of the multiple inlet ports and into the expandable balloon increases a height of the expandable articulating pleated member to increase a separation between the superior and inferior endplates;
wherein the spinal implant is filled with a fusion promoting material;
and
wherein at least one of the multiple inlet ports extends through the outward-facing surface and the inward-facing surface of the articulating pleated member sidewall.

7 more elements

A spinal implant, comprising:

a superior endplate having a superior bone contacting surface and an inferior engagement surface;
an inferior endplate having an inferior bone contacting surface and a superior engagement surface;
a single cashew-shaped expandable articulating pleated member that extends between the superior and inferior endplates and is mated to the engagement surfaces of the superior and inferior endplates, the expandable articulating pleated member being selectively expandable between a compressed condition and an expanded condition, the expandable articulating pleated member having a sidewall with an inward-facing surface, an outward-facing surface, and an interior volume disposed within the sidewall between the inward-facing and outward-facing surfaces, the interior volume defining an internal chamber for holding a volume of a fluid;
a thru-hole that extends from the superior surface of the superior endplate, through a central opening of the expandable articulating pleated member, to the inferior surface of the inferior endplate;
an expandable balloon configured to receive an expansion material and placed within the central opening of the expandable articulating pleated member;
and
an inlet port effective to communicate the expansion material into the expandable balloon;
and
wherein delivery of the expansion material through the inlet port and into the expandable balloon increases a height of the expandable articulating pleated member and thereby increases a distance between the superior and inferior endplates;
wherein the spinal implant is filled with a fusion promoting material;
and
wherein the inlet port extends through the outward-facing and inward-facing surfaces of the expandable articulating pleated member sidewall.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/792,871Filed 7 Jul 2015 · continuation
Priority: 17 May 2007
Published: US 2015/0305888 A129 Oct 2015
Granted: 21 Jan 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification19 codes

A61F 2/4425
Intervertebral or spinal discs, e.g. resilient: made of articulated components
A61F 2/441
For the spine, e.g. vertebrae or spinal discs: made of inflatable pockets or chambers filled with fluid, e.g. with hydrogel
A61F 2/4455
For the spine, e.g. vertebrae or spinal discs: for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion…
A61F 2/4611
For insertion or extraction of endoprosthetic joints or of accessories thereof: of spinal prostheses

Family

Application11/750,113Parent of this division · filed 17 May 2007
Application13/561,271Parent of this continuation · filed 30 Jul 2012
US 8,273,124 B2Parent of this division · filed 25 Sep 2012
US 2015/0305888 A1Pre-grant publication · published 29 Oct 2015
US 9,101,486 B2Parent of this continuation
Application13/561,271Parent of this division
US 2008/0288073 A1Published application
US 2012/0316652 A1Published application
US 10,537,435 B2This patent

From the US filing history. Foreign family members aren’t listed.