A minimaly invasive spacer for positioning between vertebral members. The spacer is adjustable between a first orientation having a reduced size to facilitate insertion between the vertebral members. A second orientation has an enlarged size for contacting the vertebral members. The spacer includes linkages...http://www.google.fr/patents/US7070598?utm_source=gb-gplus-shareBrevet US7070598 - Minimally invasive expanding spacer and method
