Expandable fusion device and method of installation thereof
First Claim
1. An expandable fusion device comprising:
- a first endplate;
a first ramp that is pivotally coupled to the first endplate;
a second endplate;
a second ramp that is pivotally coupled to the second endplate;
a translation member assembly in engagement with the first ramp and the second ramp, the translation member assembly comprising ramps on a first side of the expandable fusion device and ramps on a second side of the expandable fusion device;
a first actuation member in engagement with the translation member assembly on the first side of the expandable fusion device; and
a second actuation member in engagement with the translation member assembly on the second side of the expandable fusion device,wherein the first ramp comprises a first anterior ramp frame and a first posterior ramp frame, and wherein the second ramp comprises a second anterior ramp frame and a second posterior ramp frame.
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Abstract
The present invention provides an expandable fusion device capable of being inserted between adjacent vertebrae to facilitate the fusion process. A method of installing an expandable fusion device may comprise introducing the expandable fusion device into an intervertebral space, wherein the expandable fusion device comprises a proximal end, a distal end, an anterior side connecting the proximal end and the distal end, and a posterior side connecting the proximal end and the distal end, wherein the expandable fusion device has an anterior height on the anterior side and a posterior height on the posterior side. The method may further comprise adjusting the anterior height of the expandable fusion device independently from adjustment of the posterior height. The method may further comprise adjusting the posterior height of the expandable fusion device.
278 Citations
18 Claims
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1. An expandable fusion device comprising:
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a first endplate; a first ramp that is pivotally coupled to the first endplate; a second endplate; a second ramp that is pivotally coupled to the second endplate; a translation member assembly in engagement with the first ramp and the second ramp, the translation member assembly comprising ramps on a first side of the expandable fusion device and ramps on a second side of the expandable fusion device; a first actuation member in engagement with the translation member assembly on the first side of the expandable fusion device; and
a second actuation member in engagement with the translation member assembly on the second side of the expandable fusion device,wherein the first ramp comprises a first anterior ramp frame and a first posterior ramp frame, and wherein the second ramp comprises a second anterior ramp frame and a second posterior ramp frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An expandable fusion device comprising:
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a first endplate; a second endplate; a translation member assembly disposed at least partially between the first endplate and the second endplate, wherein the translation member assembly comprises; an anterior translation portion disposed on an anterior side of the expandable fusion device, wherein the anterior translation portion comprises one or more ramps; a posterior translation portion in engagement with the anterior translation portion, wherein the posterior translation portion is disposed on a posterior side of the expandable fusion device, wherein the posterior translation portion is slidable with respect to the anterior translation portion, wherein the posterior translation portion comprises one or more ramps; an anterior ramped end disposed on the anterior side of the expandable fusion device and at a proximal end of the expandable fusion device; and a posterior ramped end in engagement with the anterior ramped end, wherein the posterior ramped end is disposed on the posterior side of the expandable fusion device and at the proximal end of the expandable fusion device, wherein the posterior ramped end is slidable with respect to the anterior ramped end; a first actuation screw threaded through a bore in the anterior ramped end and engaging the anterior translation portion; and
a second actuation screw threaded through a bore in the posterior ramped end and engaging the posterior translation portion. - View Dependent Claims (12, 13, 14, 15)
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16. A method of installing an expandable fusion device, the method comprising:
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introducing the expandable fusion device into an intervertebral space, wherein the expandable fusion device comprises a proximal end, a distal end, an anterior side connecting the proximal end and the distal end, and a posterior side connecting the proximal end and the distal end, wherein the expandable fusion device has an anterior height on the anterior side and a posterior height on the posterior side; adjusting the anterior height of the expandable fusion device independently from adjustment of the posterior height; and adjusting the posterior height of the expandable fusion device, wherein the anterior height is first adjusted prior to adjustment of the posterior height to set a lordotic angle of the expandable fusion device, and wherein the adjustment of the anterior height continues while the posterior height is adjusted. - View Dependent Claims (17, 18)
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Specification