Systems and method in accordance with embodiments of the present invention can includes an implant having an initiating piece and a distraction piece. The initiating piece can include a lower distraction element, a second wing, a lower portion of a spacer, and a lower portion of a first wing. The initiating...http://www.google.ca/patents/US8070778?utm_source=gb-gplus-sharePatent US8070778 - Interspinous process implant with slide-in distraction piece and method of implantation
