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US 2014/0228955 A1Published application
Expandable Fusion Device and Method of Installation Thereof
AssigneeGlobus Medical, Inc.
InventorMark Weiman
Life of this patent
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Abstract
The present invention provides an expandable fusion device capable of being installed inside an intervertebral disc space to maintain normal disc spacing and restore spinal stability, thereby facilitating an intervertebral fusion. In one embodiment, the fusion device includes a central ramp, a first endplate, and a second endplate, the central ramp capable of being moved in a first direction to move the first and second endplates outwardly and into an expanded configuration. The fusion device is capable of being deployed down an endoscopic tube.
Claims19
An intervertebral implant comprising:
- a first endplate having a first end and a second end, the first endplate comprising an upper side, a lower side, first ramped surfaces proximate the first end, and second ramped surfaces proximate the second end;
- a second endplate having a first end and a second end, the second endplate comprising an upper side, a lower side, first ramped surfaces proximate the first end, and second ramped surfaces proximate the second end;
- a central ramp having a first end and a second end, the central ramp comprising a expansion portion at the first end and an extension extending from the expansion portion, the expansion portion comprising first ramped surfaces in engagement with the first ramped surfaces of the first endplate and second ramped surfaces in engagement with the second ramped surfaces of the second endplate;
- and
- a driving ramp comprising a bore extending through the driving ramp, the driving ramp comprising ramped surfaces in engagement with the first ramped surfaces of the second endplate;
- wherein the central ramp is configured to move in a first direction and cause the first endplate and the second endplate to move outwardly and away from one another
- wherein the driving ramp is coupled to an actuator assembly.
4 more elements
An intervertebral implant comprising:
- a first endplate having a first end and a second end, the first endplate comprising an upper side, a lower side, first ramped surfaces extending from the lower side proximate the first end, and second ramped surfaces extending from the lower side proximate the second end;
- a second endplate having a first end and a second end, the second endplate comprising an upper side, a lower side, first ramped surfaces extending from the lower side proximate the first end, and second ramped surfaces extending from the lower side proximate the second end;
- a central ramp having a first end and a second end, the central ramp comprising a first expansion portion at the first end and a second expansion portion and an extension extending from the first expansion portion, the first expansion portion comprising a first side portion and a second side portion, the first and second side portions each comprising overlapping ramped portions in engagement with first ramped surfaces of the first endplate and the second ramped surfaces of the second endplate, the second expansion portion comprising a first ramped surface and a second ramped surface, the first ramped surface is in engagement with a central ramped surface of the first endplate, and the second ramped surface is in engagement with a central ramped surface of the second endplate;
- a driving ramp comprising a bore extending through the driving ramp, the driving ramp comprising ramped surfaces in engagement with the first ramped surfaces of the second endplate;
- and
- an actuator assembly, the actuator assembly comprising a head portion and an extension that extends through the bore of the driving ramp, the extension of the actuator assembly in engagement with the extension of the central ramp.
3 more elements
An intervertebral implant comprising:
- a first endplate having a first end and a second end and a first ramped surface proximate the first end, and a second ramped surface proximate the second end;
- and
- a second endplate having a first end and a second end and a first ramped surface proximate the first end, a second ramped surface proximate the second end, and a central ramped surface between the first ramped surface and the second ramped surface;
- and
- a central ramp having a first end and a second end, the central ramp comprising:
- a bore extending through the central ramp;
- a first expansion portion at the first end of the central ramp, the first expansion portion comprising a first side portion, a second side portion, the first side portion comprising a first ramped surface and a second ramped surface overlapping the first ramped surface, the second side portion comprising a first ramped surface and a second ramped surface overlapping the first ramped surface;
- an extension, the extension extending from the first expansion portion to the second end of the central ramp;
- a second expansion portion located on the extension between the first end and the second end of the central ramp, the second expansion portion comprising a first ramped surface and a second ramped surface;
- a driving ramp having an upper side, and a lower side;
- a first side portion connecting the upper portion and the lower portion, the first side portion comprising a ramped surface;
- and
- a second side portion connecting the upper portion and the lower portion, the second side portion comprising a ramped surface;
- wherein the upper side, lower side, first side portion, and the second side portion form a bore through the driving ramp;
- and
- an actuator assembly comprising:
- a through bore that extends through the actuator assembly;
- a head portion;
- and
- an extension in engagement with the extension of the central ramp.
17 more elements
Dependencies are inferred from the claim text.