An artificial spinal disc is provided for unilateral insertion from the posterior side of the patient and includes a pair of plate members with a bearing associated with one plate member and a depression associated with the other for permitting limited flexibility of patient movement. An outrigger is...http://www.google.de/patents/US20050256578?utm_source=gb-gplus-sharePatent US20050256578 - Artificial spinal disc, insertion tool, and method of insertion
