A thread-thru polyaxial pedicle screw fastening system. The fastening system consists of an anchoring bone screw having threads on one end for use in anchoring to the screw to the spine and a spherical connector on the other end operating as a pivot point about which a U-shaped connecting assembly moves...http://www.google.com/patents/US20110040336?utm_source=gb-gplus-sharePatent US20110040336 - Thread-thru polyaxial pedicle screw system
