Patent ID: 8574273

Claim:
A bone screw comprising: a) a screw body comprising a plurality of threads along all or a portion of said screw body; b) a screw head attached to one end of said screw body; c) an interior channel extending longitudinally through said screw head and through at least a portion of said screw body, wherein said interior channel of said screw body has a width of less than 5.0 millimeters (mm); d) a plurality of radially-disposed delivery through channels connecting said interior channel to an exterior of said screw body, said delivery through channels comprising exterior openings; e) a screw tip attached to said screw body at an end opposite to the screw head, wherein said screw tip is narrower than the screw body; and f) at least one helical exterior groove extending continuously along the exterior of said screw body, wherein said exterior groove extends through said plurality of threads of said screw body and connects each of said exterior openings of said delivery through channels, wherein said threads are interrupted only by said helical exterior groove.