An apparatus and method for placing adjacent vertebrae at a fixed distance and angular relationship relative to each other, fixing said vertebrae in said position by use of a milling block engaging each of said adjacent vertebrae and then using a milling means, the depth, length and excursion of which...http://www.google.es/patents/US7635370?utm_source=gb-gplus-sharePatente US7635370 - Bone removal device
