Intersomatic cage with unified grafts
AssigneeLDR Medical
InventorJean Huppert
Life of this patent
Estimating the term…
Abstract
Intervertebral cage (1) composed of a ring, with a thin main wall (2) prolonged by two return parts (3, 4), the thin main wall having an approximately constant thickness and each return part (3, 4) being extended by an end part (5 and 6), the end parts (5, 6) facing each other with a gap between them, the wall (2), the return parts (3, 4) and the end parts (5, 6) delimiting an inner cavity, the extension of the clear gap parallel to the wall (2) being between 50% and 100% of the largest dimension of the cavity (30) parallel to the wall (2), and preferably between 70% and 90%.
Claims13
Intervertebral cage (1) composed of a ring, with a thin main wall (2) prolonged by two return parts (3, 4), the thin main wall having an approximately constant thickness and each return part (3, 4) being extended by an end part (5 and 6), the end parts (5, 6) facing each other forming a clear gap between them, the wall (2), the return parts (3, 4) and the end parts (5, 6) delimiting an inner cavity (3), characterized in that the extension of the clear gap parallel to the wall (2) is between 50% and 100% of the largest dimension of the cavity (3) parallel to the wall (2), and preferably between 70% and 90%.
Intervertebral cage according to any one of the previous claims, characterised in that one of the return parts comprises coupling means on its part external to the ring, designed to cooperate with the placement instrumentation to place the implant or the intervertebral cage in the intervertebral space.
Intervertebral cage according to one of the previous claims, characterised in that it comprises instrumentation for placement of an intervertebral cage between two vertebrae in the disk space, comprising a rod that will cooperate with the associated coupling means (13) in an outer surface of the intervertebral cage, characterised in that the instrumentation at the distal end of the rod comprises an extension in the form of a rectangular or slightly curved wall (19), which is inclined slightly with respect to the rod such that when it is in its position in which the rod cooperates with the coupling means (13), the wall (19) closes off the clear gap between the two end parts.
Intervertebral cage and instrumentation according to claim 6 or 7 or 8, characterised in that blocking means are provided to block mutual rotation of the cage and the instrumentation when the rod (21) is cooperating with the coupling means (13).
Dependencies are inferred from the claim text.