Importance

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Abstract

Screw system is useful for transiliac fixation of a sacrum and/or sacroiliac joint and/or for application in other skeletal areas, and includes a cannulated bone screw preferably capable of spanning iliac crests of a patient, having an elongate, hollow body with openings on a first end of the body and on an opposing, second end of the body; a tip on the first end of the body, which preferably is a thread-cutting tip that can engage and thread the ilia or other bone of the patient; a head about the second end of the body, which can be engaged with a surgical tool; and threads on at least part of the body between the first and second ends; a locknut with threads for interference fitting corresponding generally to those of the screw for threading on the screw; and preferably also a washer. Major-minor, pitch-diameter, locking interference fitting can be provided. Associated kit includes at least one such screw system; a guidewire, which is essentially as long as or longer than the elongate hollow body of the screw of the at least one screw system, and over which the screw can pass by the openings in the hollow body of the screw, and which beneficially is rigid and has a drill bit tip; and preferably, a cannulated starter drill and/or a tool set to engage the head of the screw for twisting the screw so that it can thread through bone and/or engage the nut so that it can be tightened onto the first end of the screw.

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First Claim