US 10,299,934 B2Granted

Expandable vertebral implant

AssigneeGlobus Medical, Inc.

InventorsJody L. Seifert, Chad Glerum, Mark Weiman, Mark Adams, David C. Paul

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Abstract

A joint spacer therapeutically maintains separation of bones of a joint. A carriage is slideably retained within the frame and has at least one ramped surface. An actuator screw is threadably engaged with the frame, and rotatably connected to the carriage, to cause the carriage to slideably move within the frame when the actuator screw is rotated. First and second endplates engage the bones of the joint, and each has at least one ramped surface that is mateable with the ramped surface of the carriage, whereby when the carriage is slideably moved by rotation of the actuator screw, the endplates ramped surface slides against the carriage ramped surface to cause the endplates to move along an axis transverse to the longitudinal axis of the frame, to increase the height of the spacer. Piercing elements are connected to the carriage to pierce bone of the joint when the carriage is moved.

Claims20

Dependent claims

An orthopedic device comprising:

a body member including a front portion, a back portion, a pair of opposing sidewalls extending from the front portion to the back portion, and a support screw opening in each of the opposing sidewalls;
a translation member received in the body member, the translation member including at least one upper ramp portion, at least one lower ramp portion, and a rod extension, wherein the body member is attached to the translation member via a support screw received in the translation member through each of the support screw openings in each of the opposing sidewalls;
an upper endplate having at least one lower ramp for engaging the upper ramp portion of the translation member;
a lower endplate having at least one upper ramp for engaging the lower ramp portion of the translation member;
an actuation member operably connected to the translation member via a spring clip, whereby rotation of the actuation member in a first direction causes the translation member to move in a first direction, thereby causing the distance of separation between the upper endplate and the lower endplate to increase;
and
a friction nut disposed around the actuation member and configured to stabilize the actuation member during rotation of the actuation member,
wherein the upper endplate is attached to an upper plate portion including an extension and the lower endplate is attached to a lower plate portion including an extension, wherein the upper plate portion comprises an enclosed bore hole for receiving the rod extension of the translation member,
wherein the upper plate portion includes a through hole for receiving a fastener, and a recess for receiving a fastener back out prevention mechanism, wherein the recess is laterally offset from the through hole of the upper plate portion,
wherein the extension is received in a recess in the upper endplate to couple the upper plate portion to the upper endplate, and
wherein in a contracted position, the upper plate portion and the lower plate portion move toward the body member such that the extensions of the upper and lower plate portions are received in the body member and not exposed, and in an expanded position, the upper plate portion and the lower plate portion move away from the body member such that the extensions of the upper and lower plate portions are exposed.

8 more elements

An orthopedic device comprising:

a body member including a front portion, a back portion, a pair of opposing sidewalls extending from the front portion to the back portion, and a support screw opening in each of the opposing sidewalls;
a translation member received in the body member, the translation member including at least one upper ramp portion, at least one lower ramp portion, and a rod extension, wherein the body member is attached to the translation member via a support screw received in the translation member through each of the support screw openings in each of the opposing sidewalls;
an upper endplate having at least one lower ramp for engaging the upper ramp portion of the translation member;
a lower endplate having at least one upper ramp for engaging the lower ramp portion of the translation member;
an actuation member operably connected to the translation member, whereby rotation of the actuation member in a first direction causes the translation member to move in a first direction, thereby causing the distance of separation between the upper endplate and the lower endplate to increase;
a friction nut disposed around the actuation member and configured to stabilize the actuation member during rotation of the actuation member;
an upper plate member including an extension received in a recess in the upper endplate, the upper plate member being attached to the upper endplate via one or more fasteners, wherein the upper plate member comprises an enclosed bore hole for receiving the rod extension of the translation member;
and
a lower plate member attached to the lower endplate via one or more fasteners,
wherein the upper plate member includes a through hole for receiving a fastener and a recess for receiving a fastener back out prevention mechanism, wherein the recess is offset from the through hole of the upper plate member,
wherein the lower plate member includes a recess for receiving a fastener back out prevention mechanism, wherein the recess is laterally offset from the through hole of the upper plate member, and
wherein in a contracted position, the upper plate member and the lower plate member move toward the body member such that the extension of the upper plate member is received in the body member and not exposed, and in an expanded position, the upper plate member and the lower plate member move away from the body member such that the extension of the upper plate member is exposed.

9 more elements

An orthopedic device comprising:

a body member including a front portion, a back portion, a pair of opposing sidewalls extending from the front portion to the back portion, and a support screw opening in each of the opposing sidewalls;
a translation member received in the body member, the translation member including at least one upper ramp portion, at least one lower ramp portion, and a rod extension, wherein the body member is attached to the translation member via a support screw received in the translation member through each of the support screw openings in each of the opposing sidewalls;
an upper endplate having at least one lower ramp for engaging the upper ramp portion of the translation member;
a lower endplate having at least one upper ramp for engaging the lower ramp portion of the translation member;
an actuation member operably connected to the translation member, whereby rotation of the actuation member in a first direction causes the translation member to move in a first direction, thereby causing the distance of separation between the upper endplate and the lower endplate to increase;
a friction nut disposed around the actuation member and configured to stabilize the actuation member during rotation of the actuation member;
a washer positioned in between an interface of the actuation member and the translation member;
wherein the upper endplate is attached to an upper plate portion and the lower endplate is attached to a lower plate portion, wherein the upper plate portion comprises an enclosed bore hole for receiving the rod extension of the translation member, and
an upper plate portion and a lower plate portion,
wherein the lower plate portion includes a through hole for receiving a fastener, an extension, and a recess for receiving a fastener back out prevention mechanism, wherein the recess is laterally offset from the through hole of the lower plate portion, and
wherein in a contracted position, the upper plate portion and the lower plate portion move toward the body member such that the extension of the lower plate portion is received in the body member and not exposed, and in an expanded position, the upper plate portion and the lower plate portion move away from the body member such that the extension of the lower plate portion is exposed.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/837,452Filed 15 Mar 2013 · continuation in part
Priority: 11 Dec 2012
Published: US 2014/0163682 A112 Jun 2014
Granted: 28 May 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification17 codes

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 2/4425
Intervertebral or spinal discs, e.g. resilient: made of articulated components
A61B 17/8042
Having indirect contact with screw heads, or having contact with screw heads maintained with the aid of additional components, e.g. nuts, wedges…:…
A61F 2002/2835
Bones: bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material