A method for inserting an intervertebral disc prosthesis into a space between two vertebrae involves inserting the prosthesis partway into the space under constraint to prevent endplates of the prosthesis from articulating, releasing the prosthesis from constraint, and inserting the unconstrained prosthesis...http://www.google.com/patents/US7585326?utm_source=gb-gplus-sharePatent US7585326 - Methods and apparatus for intervertebral disc prosthesis insertion
