SYSTEMS AND APPARATUSES FOR SECURING AN IMPLANT IN INTERVERTEBRAL SPACE

摘要

Systems and tools for inserting and securing an implant within the intervertebral space. An intervertebral disc implant with upper and lower bearing members with an articulation interface between the members for providing relative motion therebetween. The implant may be provided with various securing members for fixing the implant within the intervertebral space. A tool may be used to insert the implant, which includes a plurality of shiftable implant engaging members that are shiftable between non-engaging and engaging configurations to alternatively release or hold the implant.

主权项

1. An intervertebral disc implant for being inserted between adjacent upper and lower vertebral bones, comprising:
an upper bearing member; a lower bearing member; a body of the upper bearing member having an outer bearing surface for being disposed adjacent the upper vertebral bone; a body of the lower bearing member having an outer bearing surface for being disposed adjacent the lower vertebral bone; an articulation interface between the upper and lower bearing members for allowing relative movement therebetween with the bearing members configured to fit in an intervertebral space between upper and lower vertebral bones; a rotary securing member rotatably mounted to one of the bearing members to be carried by the one bearing member, so that the rotary securing member extends along the outer bearing surface of the one bearing member prior to being inserted into the intervertebral space, and is inserted together with the one bearing member into the intervertebral space, and after insertion of the rotary securing member and the one bearing member into the intervertebral space, the rotary securing member is arranged for being rotated for securing the one bearing member to the adjacent vertebral bone; a rotary shaft of the securing member having a longitudinal axis; and a plurality of spaced-apart plate-like bone-engaging portions extending generally transversely from the rotary shaft such that rotation of the rotary shaft about the longitudinal axis causes a corresponding rotation of the bone engaging portions about the longitudinal axis to allow the rotary shaft of the rotary securing member to be rotated from an undeployed orientation with the bone-engaging portions out of engagement with the adjacent vertebral bone and a deployed orientation with the bone-engaging portions in imbedded engagement with the adjacent vertebral bone.