A prosthetic replacement for a posterior element of a vertebra comprising portions that replace the natural lamina and the four natural facets. The prosthetic replacement may also include portions that replace one or more of the natural spinous process and the two natural transverse processes. If desired,...http://www.google.de/patents/US6419703?utm_source=gb-gplus-sharePatent US6419703 - Prosthesis for the replacement of a posterior element of a vertebra
