Devices for anchoring and/or blocking spinal implants in an intervertebral disc space are disclosed. In one aspect of the invention the device includes a rigid blocking member having one end unconnected and free to block a spinal implant, and another end attached to a securing member to secure the blocking...http://www.google.de/patents/US20050261774?utm_source=gb-gplus-sharePatent US20050261774 - System and method for blocking and/or retaining a prosthetic spinal implant
