Minimally invasive spinal facet compression screw and system for bone joint fusion and fixation

摘要

A system comprising a screw element having a generally cylindrical body having a bore or lumen therethrough and a plurality of fenestrations or windows through which biological material may be provided. The system comprises a tool for inserting the biological material into the screw element so that the biological material may extrude through the plurality of fenestrations or windows and through an aperture in the tip of the screw element thereby enabling providing a fusion mass across two adjacent facet bones or a facet joint wherein the screw itself provides both a fixation component and a screw component.

主权项

1. A surgical implant system comprising:
a screw element having at least one threaded zone adapted to fix a first bone and a second bone together, said screw element comprising a tool attachment zone adjacent a buttressing head, said tool attachment zone adapted to be secured to an introducer or inserter tool; said screw element comprising a core having an inner wall that defines a hollow area and an outer wall having said at least one threaded zone, wherein said hollow area is adapted to receive biological material for the promotion of osteosynthesis or fusing of said first bone and said second bone and for permitting said biological material to pass through at least one window; said core being fenestrated with said at least one window; said implant system further comprising an introducer or inserter tool for coupling to said tool attachment zone, said introducer or inserter tool comprising: a body having a first end adapted to be secured to said tool attachment zone and a second end; said body comprising an aperture or bore therethrough adapted to permit said biological material to be passed therethrough and into said hollow area of said screw element; wherein the first end of said introducer or inserter tool comprises at least one engaging surface for substantially simultaneously (i) engaging said tool attachment zone to enable said introducer or inserter tool to apply a torque or rotational force to the screw element to screw the screw element into said bone in response to rotation of said introducer or inserter tool, (ii) causing an alignment of said aperture or bore of said introducer or inserter tool and said hollow area of said screw element so that said biological material may be passed through said aperture or bore and into said hollow area, and (iii) fixing said introducer or inserter tool to said screw element.