A rod reduction device is provided having a reduction nut adapted to mate to the rod-receiving portion of a spinal implant, and a driver tool that is effective to engage the reduction nut such that rotation of the driver tool rotates the reduction nut to reduce a rod positioned between the reduction...http://www.google.com/patents/US7156849?utm_source=gb-gplus-sharePatent US7156849 - Rod reduction nut and driver tool
