Spinal plate assembly, and methods of use, wherein a retaining element such as a retaining band, optionally a resiliently flexible band, mounted to a spinal plate, activates a blocking feature of the spinal plate assembly to thereby prevent the bone fastener from withdrawing out of the spinal plate assembly...http://www.google.fr/patents/US7255699?utm_source=gb-gplus-shareBrevet US7255699 - Spinal plate assembly
