The present application is directed to spacing devices that attach directly or indirectly to vertebral implants. The spacing device may include a first side that faces the implant, and an angled second side that faces towards a vertebral member. The angled second side matches the shape of the vertebral...http://www.google.de/patents/US7621953?utm_source=gb-gplus-sharePatent US7621953 - End device for a vertebral implant
