The present invention generally provides a polyaxial fixation device having a shank with a spherical head formed on a proximal end thereof, and a receiver member having an axial passage formed therein that is adapted to polyaxially seat the spherical head of the shank. The polyaxial bone screw further...http://www.google.fr/patents/US20040267264?utm_source=gb-gplus-shareBrevet US20040267264 - Polyaxial bone screw
Numéro de demande: 10/608,904 Numéro de publication: US 2004/0267264 A1 Date de dépôt: 27 juin 2003 Brevet délivré: US7087057 ( Date de délivrance 8 août 2006)
