Expandable fusion device and method of installation thereof
AssigneeGlobus Medical, Inc.
InventorsTyler Hessler, Alex Burkhardt, Todd Jasinski
Life of this patent
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Abstract
Expandable fusion devices capable of being inserted between adjacent vertebrae to facilitate the fusion process. The expandable fusion device may include first and second endplates, a translation member configured to expand an anterior side and/or posterior side of the device, a plurality of joists configured to connect the first and second endplates to the translation member, and first and second actuation members disposed internally to the device such that openings on a back side of the device can be used to expand or compress the anterior side, the posterior side, or both and such openings may also be used to introduce graft material into the device.
Claims19
An expandable fusion device comprising:
- first and second endplates;
- a plurality of moveable joists pivotally coupled with the first and second endplates;
- a translation member assembly including an actuation member and a plurality of ramps engaged with the plurality of joists;
- and
- a locking washer keyed to the actuation member, wherein the actuation member is configured to move the joists such that the first and second endplates move away from one another, and the locking washer is configured to prevent rotation of the actuation member, thereby locking a height and lordosis of the first and second endplates.
An expandable fusion device comprising:
- first and second endplates;
- first and second joists pivotally coupled with the first endplate;
- third and fourth joists engaged with the second endplate;
- a translation member in engagement with the first, second, third, and fourth joists;
- a first actuation member in engagement with the translation member, wherein the first actuation member is configured to move the first and third joists to expand the first and second endplates on a first side of the expandable fusion device;
- a first locking washer attached to the first actuation member, wherein the first locking washer is configured to prevent rotation of the first actuation member;
- a second actuation member in engagement with the translation member, wherein the second actuation member is configured to move the second and fourth joists to expand the first and second endplates on a second side of the expandable fusion device;
- and
- a second locking washer attached to the second actuation member, wherein the second locking washer is configured to prevent rotation of the second actuation member.
A system for installing and/or expanding an expandable fusion device, the system comprising:
- an expandable fusion device comprising:
- first and second endplates;
- a translation member assembly disposed at least partially between the first and second endplates, wherein the translation member assembly comprises:
- an anterior translation component disposed on an anterior side of the expandable fusion device including an anterior back ramp with a first through bore;
- an anterior actuation member including a head and a threaded shaft for moving the anterior translation component;
- a posterior translation component disposed on a posterior side of the expandable fusion device including a posterior back ramp with a second through bore;
- and
- a posterior actuation member including a head and a threaded shaft for moving the posterior translation component, wherein rotation of the anterior and/or posterior actuation members is configured to expand the fusion device on the anterior side and/or posterior side, respectively, to achieve a height and lordosis of the first and second endplates;
- and
- an instrument for installing and/or expanding the expandable fusion device comprising:
- a body with a cannulated sleeve attachable to one of the first and second through bores;
- a first driver positionable through the cannulated sleeve, the first driver having a tip configured to engage with a drive recess in the head of the anterior or posterior actuation member;
- and
- a second driver having a tip configured to engage with a drive recess in the head of the other actuation member;
- wherein a distal end of the body includes a pair of tabs configured to interface with corresponding instrument notches on opposite sides of the anterior and posterior back ramps.
Dependencies are inferred from the claim text.