US 9,848,996 B2Granted

Variable lordotic interbody spacer

AssigneeGlobus Medical, Inc.

InventorKurt Faulhaber

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Abstract

A variable lordotic interbody spacer including a face plate, superior and inferior endplates coupled to the face plate via a hinge, an actuation frame between the endplates, and an actuation screw. The face plate includes actuation and stabilizer channels. Each of the endplates has endplate arms coupled by an endplate base, and includes actuation ramp recesses. The actuation frame includes frame arms coupled by a frame base in a generally U-shaped configuration, each actuation frame arm having a stabilizer feature passing through a corresponding stabilizer channel and having actuation ramp pins fitted to a corresponding ramp recesses. The actuation screw passes through the actuation channel, with a head retained at the front surface and a threaded end coupled to the actuation frame. When operated, the actuation screw moves the actuation frame between the superior endplate and the inferior endplate to adjust an angle therebetween.

Claims18

Dependent claims

An apparatus for enabling a spinal fusion treatment and including a variable lordotic interbody spacer, the apparatus comprising:

a face plate having a front surface and a rear surface, the face plate further having at least one actuation channel and at least two stabilizer channels formed through a portion of the face plate;
superior and inferior endplates, each of the endplates having first and second endplate arms coupled by an endplate base in a generally U-shaped configuration, each endplate arm coupled to the rear surface of the face plate via a hinge opposite from the base, and each endplate arm having a ramp recess on a top surface and a bottom surface;
an actuation frame positioned between the superior endplate and the inferior endplate, the actuation frame having first and second frame arms coupled by a frame base in a generally U-shaped configuration, each frame arm having a stabilizer feature opposite from the frame base and configured to pass through a corresponding stabilizer channel, each frame arm having an actuation ramp pin on a top surface and on a bottom surface fitted to a corresponding ramp recess, the actuation frame further including a receptacle formed at the inside of the frame base between each frame arm;
and
an actuation screw having a head, body and threaded end, the actuation screw body passing through the actuation channel, the head retained at the front surface and the threaded end threadably coupled to the receptacle of the actuation frame, wherein, when operated, the actuation screw moves the actuation frame between the superior endplate and the inferior endplate to adjust an angle formed there between, and wherein the actuation screw is configured to be retained in the face plate by a screw plate retainer fastened to the front surface of the face plate, wherein the screw plate retainer is configured to allow rotation of the actuation screw within the face plate while otherwise preventing the actuation screw from changing position relative to the face plate.

2 more elements

A standalone variable lordotic interbody spacer configured to be implanted between two adjacent vertebrae comprising:

a face plate having a front surface and a rear surface, the face plate further having at least one actuation channel, a first stabilizer channel, and a second stabilizer channel formed through a portion of the face plate, wherein the first stabilizer channel comprises a first plus-shaped recess and the second stabilizer channel comprises a second plus-shaped recess;
superior and inferior endplates, each of the endplates having first and second endplate arms coupled by an endplate base, each endplate arm coupled to the rear surface of the face plate via a hinge opposite from the base, and each endplate arm having a ramp recess on a top surface and a bottom surface;
an actuation frame positioned between the superior endplate and the inferior endplate, the actuation frame having a first frame arm, a second frame arm, and a center core coupled by a frame base, each frame arm having ramped protrusions extending along a portion of the arms, and wherein the first frame arm is configured to be received in the first plus-shaped recess in the face plate and wherein the second frame arm is configured to be received in the second plus-shaped recess;
and
an actuation screw having a head, body, and threaded end, the actuation screw body passing through the actuation channel, the head retained in the face plate and the threaded end threadably coupled to the center core of the actuation frame, wherein, the spacer has a collapsed position where the superior and inferior endplates are in contact with one another and an expanded position where the superior and inferior endplates are separated a distance from one another, and wherein the actuation screw is configured to be retained in the face plate by a screw plate retainer fastened to the front surface of the face plate, wherein the screw plate retainer is configured to allow rotation of the actuation screw within the face plate while otherwise preventing the actuation screw from changing position relative to the face plate.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/741,939Filed 17 Jun 2015
Published: US 2016/0367377 A122 Dec 2016
Granted: 26 Dec 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

A61F 2/447
For the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages: substantially parallelepipedal, e.g.…
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 2002/30182
Cross-sections or two-dimensional shapes: other shapes
A61F 2002/30471
Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements: connected by a hinged linkage mechanism, e.g.…