A screw formed of cortical bone for use in the human body with an implant having a screw hole for receiving at least a portion of a screw therethrough, includes a shaft with a thread along at least a portion of its length. The thread has an outer diameter dimensioned to pass through the screw hole in...http://www.google.ca/patents/US7094239?utm_source=gb-gplus-sharePatent US7094239 - Screws of cortical bone and method of manufacture thereof
