主权项 |
1. A bone screw having a shank, a tip, and a head, at least a portion of said shank having threads thereon configured to be threaded into bone structure, said shank having a longitudinal cannula therein, at least one fenestration extending outwardly from said cannula to the exterior of said screw, a central opening in the outer end of the head configured to form a socket for receiving a driving tool for driving the screw into bone structure, said opening being configured to form a connector inwardly of said socket and adapted to be sealably connected to a source of bone cement to said screw so that bone cement may be delivered to said cannula of said screw and forced out of said at least one fenestration and into bone structure proximate said fenestrations. |