Spinal support fixator anchor screw has bone screw with locking nut for ball joint connection to fixing rod

摘要

The spinal support anchor screw has a bone screw (1) with a threaded cylindrical section (5) and a stop collar (7). A locking nut (8) is threaded onto the threaded shank to fix a slide (4) on a fixing rod (3). A ball joint is provided to allow adjustment of the connecting slide and the fixing rod. The ball joint is held by the locking nut.