A positioning means for stabilizing segments of the spinal column or dummies between two such segments has a simple design and allows a certain alignment of the connecting rods to be connected thereto. To this end a positioning screw (1) is provided which comprises a threaded shaft part (2) and a receiver...http://www.google.de/patents/US5042982?utm_source=gb-gplus-sharePatent US5042982 - Positioning device
