An implant for fixation of a bone includes a shaft having a proximal end and a distal end, and a longitudinal axis defined between the proximal end and the distal end. A plurality of blades are disposed on the shaft, and are helically twisted about the longitudinal axis. At least one of the blades has...http://www.google.de/patents/US20040158249?utm_source=gb-gplus-sharePatent US20040158249 - Bone fixation system
