An intervertebral prosthesis includes a first component adapted to engage a first vertebra and a second component adapted to engage a second vertebra. A row of pillars is disposed on at least one of the components. The row of pillars is adapted to enter a groove and anchor the prosthesis in the intervertebral...http://www.google.es/patents/US20080051901?utm_source=gb-gplus-sharePatente US20080051901 - Spinal Prosthesis with Multiple Pillar Anchors
