Intervertebral implant having extendable bone fixation members

摘要

An intervertebral implant is configured to be fixed in an intervertebral space defined by a first vertebral body and a second vertebral body. The intervertebral implant includes an implant body sized to be inserted into an intervertebral space, and a fixation assembly configured to be attached to the implant body. The fixation assembly includes a housing that defines a first vertebral body facing surface and a second vertebral body facing surface spaced from the first vertebral body facing surface along a transverse direction. The fixation assembly further includes at least one fixation member supported by the housing and movable from a retracted position to an extended position, whereby in the extended position the fixation member extends out from the housing and into one of the vertebral bodies.

主权项

1. An implant configured to be fixed by an anchor in an intervertebral space defined by a first vertebral body and a second vertebral body, the implant having a top and a bottom disposed along a transversely opposite side of the implant from the top, the implant comprising:
a peripheral wall comprising
a forward wall portion having an exterior face,a rearward wall portion disposed along a longitudinally opposite side of the implant from the forward wall portion,a first side wall portion,a second side wall portion disposed along a laterally opposite side of the implant from the first side wall portion,a top surface extending along the forward wall portion, the rearward wall portion, the first side wall portion, and the second side wall portion at the top of the implant, anda bottom surface extending along the forward wall portion, the rearward wall portion, the first side wall portion, and the second side wall portion at the bottom of the implant; a central cavity at least partially bounded by the peripheral wall, the cavity comprising an opening at the top of the implant and an opening at the bottom of the implant; and a fixation assembly comprising
a housing fixedly mountable to the peripheral wall at an opening along the forward wall portion, the housing comprising an upper surface oriented toward the top of the implant with the fixation assembly mounted to the peripheral wall, a lower surface oriented toward the bottom of the implant with the fixation assembly mounted to the peripheral wall, a front surface extending between the upper surface and the lower surface and extending to the exterior face, and a back surface extending between the upper surface and the lower surface and being disposed along a longitudinally opposite side of the housing from the front surface with the fixation assembly mounted to the peripheral wall,an anchor disposed in the housing and moveable between a retracted position in which the sharpened tip of the anchor is disposed below the top of the implant with the fixation assembly mounted to the peripheral wall, and an extended position in which a sharpened tip of the anchor is disposed above the top of the implant with the fixation assembly mounted to the peripheral wall, andan actuator connected to the anchor and disposed in the housing and moveable between a disengaged position in which the anchor is in the retracted position and an engaged position that places the anchor in the extended position.