Expandable fusion device and method of installation thereof
First Claim
1. An expandable fusion device having a longitudinal axis comprising:
- a first endplate having a length extending along the longitudinal axis;
a second endplate having a length extending along the longitudinal axis;
a first joist and a second joist connected to the first endplate;
a third joist and a fourth joist connected to the second endplate;
a translation member in engagement with the first joist, second joist, third joist, and fourth joist;
a first actuation member in engagement with the translation member assembly, wherein the first actuation member is configured to move the first joist and the third joist such that the first endplate and the second endplate move in a direction away from the translation member on a first side of the expandable fusion device; and
a second actuation member in engagement with the translation member assembly, wherein the second actuation member is configured to move the second joist and the fourth joist such that the first endplate and the second endplate move in a direction away from the translation member on a second side of the expandable fusion device,wherein the first joist, the second joist, the third joist, and the fourth joist each have a length substantially equal to at least one of the first endplate and the second endplate.
1 Assignment
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Accused Products
Abstract
The present invention provides an expandable fusion device 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.
311 Citations
20 Claims
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1. An expandable fusion device having a longitudinal axis comprising:
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a first endplate having a length extending along the longitudinal axis; a second endplate having a length extending along the longitudinal axis; a first joist and a second joist connected to the first endplate; a third joist and a fourth joist connected to the second endplate; a translation member in engagement with the first joist, second joist, third joist, and fourth joist; a first actuation member in engagement with the translation member assembly, wherein the first actuation member is configured to move the first joist and the third joist such that the first endplate and the second endplate move in a direction away from the translation member on a first side of the expandable fusion device; and a second actuation member in engagement with the translation member assembly, wherein the second actuation member is configured to move the second joist and the fourth joist such that the first endplate and the second endplate move in a direction away from the translation member on a second side of the expandable fusion device, wherein the first joist, the second joist, the third joist, and the fourth joist each have a length substantially equal to at least one of the first endplate and the second endplate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An expandable fusion device having a longitudinal axis comprising:
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a first endplate having a length extending along the longitudinal axis; a second endplate having a length extending along the longitudinal axis; a translation member disposed at least partially between the first endplate and the second endplate, wherein the translation member assembly comprises; an anterior translation component disposed on an anterior side of the expandable fusion device, wherein the anterior translation portion comprises an anterior bore; a posterior translation component disposed on a posterior side of the expandable fusion device, wherein the posterior translation portion comprises a posterior bore, wherein the translation member is configured to expand the fusion device on an anterior side by moving an anterior side of the first endplate and an anterior side of the second endplate, wherein the translation member is configured to expand the fusion device on a posterior side by moving a posterior side of the first endplate and a posterior side of the second endplate; wherein the first endplate is engaged with the translation member via a first joist and a second joist, and wherein the second endplate is engaged with the translation member via a third joist and a fourth joist, wherein the first joist, the second joist, the third joist, and the fourth joist each have a length substantially equal to at least one of the first endplate and the second endplate. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification