System for performing posterior spinal arthrodesis at a facet joint
AssigneeSc Medica
InventorCamille SROUR
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Abstract
The implant device for performing posterior spinal arthrodesis at a facet joint is in the form of a flat element of constant thickness. The element has reliefs on each of its faces so as to form an anchor associated with at least one complementary anchor, such as a screw with a diameter greater than the thickness of the element. The complementary anchor can be screwed into the flat element such that at least some of its threads protrude from the faces. The element has a U-shape with a transverse part from which two branches extend. On the proximal side, the free ends of the branches have retention devices, on the inner side of the U so as to permit the screwing and insertion of the screw between the branches.
Claims13
A system for performing posterior spinal arthrodesis at a facet joint, the system comprising:
- an implant device;
- and
- a retaining means,
- wherein said implant device comprises an element for receiving a bone graft having at least one opening or indentation open on the proximal side and closed on the distal side, so as to be introduced into a cavity previously made at the location of the facet joint to be immobilized, and reliefs in the opposite faces,
- wherein said retaining means is comprised of a transfacet screw enabling said implant to be compressed in said cavity, and
- wherein the screw comprises a threaded distal part of transverse dimensions enabling it to pass into said opening or indentation, so as to enable said screw to pass into same in order to be screwed at least into the bone material downstream of said implant, and a proximal part shaped to bear against or into the bone material upstream of said implant.
Dependencies are inferred from the claim text.