A cable bone screw implant and insertion instrument assembly comprising an implantable bone screw having an enlarged head portion. An enlarged head comprises a lock aperture and an insert aperture and holds a deformable stress tube for housing a surgical cable. A lock screw resides in the lock aperture. A control mate on the enlarged head engages with an inserter instrument which comprises an arm rod portion having a driver cannula for housing a locking rod instrument. An end of the elongate rod body is enlarged having a first and second deflector arm. An interlock engages a cable bone screw implant portion. A compression taper on the arm rod portion compresses deflector arms securing the implant. An outer tube housing engages the deflector arms. Sliding the outer tube housing locks or releases the implantable bone screw. A surgical cable is tensioned between two cable bone screw implants for fixation.
