A bone attachment apparatus and implantation system. The attachment device provides a screw with channels formed therein for implantation within a bone aperture. The channels are used as a torque transfer surface during implantation, and cooperate with a thread forming tap to enable screw implantation...http://www.google.ca/patents/US7481832?utm_source=gb-gplus-sharePatent US7481832 - Method and apparatus for use of a self-tapping resorbable screw
