A surgical screw system using a surgical screw that is at least partially bioabsorbable in vivo, the screw having a recess (or optionally recesses) in its head for receiving an inserter instrument, wherein the recess has a rotational symmetry around the longitudinal axis of the screw. The recess comprises...http://www.google.es/patents/US20030158555?utm_source=gb-gplus-sharePatente US20030158555 - Surgical screw and tool for its insertion
