Patent ID: 6767367
Filing Date: 2004-07-27
Classification: A61B,A61F,Y10S

Abstract:
An interbody spinal fusion implant for implantation at least in part within and across the generally restored height of a disc space between two adjacent vertebral bodies of a human spine, said spinal implant comprising:a housing having a leading end for insertion first into the disc space, a trailing end opposite said leading end, a longitudinal axis between said leading end and said trailing end of said housing, an upper surface adapted to contact one of the adjacent vertebral bodies, a lower surface opposite said upper surface adapted to contact another one of the adjacent vertebral bodies, and a hollow interior configured to hold bone growth promoting material therein, said upper and lower surfaces each having at least one opening therein in communication with said hollow interior and with each other to permit for the growth of bone from adjacent vertebral body to adjacent vertebral body through said housing; and at least two internal rotatable members configured to be at least in part within said hollow interior of said housing, said rotatable members each having a leading end, a trailing end, and a longitudinal axis between said leading end and said trailing end of said rotatable member, the longitudinal axis of each of said at least two internal rotatable members being spaced from one another, each of said rotatable members including at least one bone engaging projection adapted to penetrably engage the bone of the adjacent vertebral bodies by rotating said bone engaging projection about the longitudinal axis of each of said rotatable members, respectively, each of said rotatable members being adapted to rotate within said hollow interior of said housing between a retracted position and a deployed position, said bone engaging projections extending through at least one of said upper and lower surfaces of said housing so as to penetrably engage the bone of the adjacent vertebral bodies when in the deployed position.