Expandable fusion device and method of installation thereof

摘要

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.

主权项

1. An expandable implant, having a proximal end and a distal end, comprising:
a first endplate extending from the proximal end to the distal end; a second endplate opposed to the first endplate extending from the proximal end to the distal end; a central ramp positioned between the first endplate and the second endplate, the central ramp including a first ramp in contact with the first endplate and a second ramp in contact with the second endplate, the central ramp further including a first expansion portion on the distal end; a driving ramp positioned at the proximal end of the implant opposite the first expansion portion, the driving ramp further positioned between the first endplate and the second endplate, wherein the driving ramp is operably connected with the central ramp; an actuator assembly comprising a threaded shaft received through the driving ramp, wherein the driving ramp includes a bore for receiving the actuator assembly and a graft delivery hole, the bore being positioned adjacent to the graft delivery hole, wherein a central longitudinal axis of the bore is parallel to and off-center from the central longitudinal axis extending along a length of the driving ramp, wherein the central longitudinal axis extending along the length of the driving ramp is measured from a center position of the driving ramp on the proximal end towards the distal end, wherein the actuator assembly is received in the bore such that a longitudinal axis of the threaded shaft is off-center from the central longitudinal axis extending along the length of the driving ramp.