An anchoring member is provided which comprises a shaft 2 to be fastened to a bone and a head 3 for connection with a rod 10, the head having a substantially U-shaped cross-section and being connected with the shaft 2 at the base 5 thereof, the head further comprising two free legs 6, 7 defining a channel...http://www.google.ca/patents/US5545165?utm_source=gb-gplus-sharePatent US5545165 - Anchoring member
