A lordotic guard and method for guiding a bone removal device to form an implantation space in the human spine and, if desired, for inserting a spinal implant into the implantation space....http://www.google.de/patents/US7314468?utm_source=gb-gplus-sharePatent US7314468 - Method for using arcuate dynamic lordotic guard with movable extensions for creating an implantation space posteriorly in the lumbar spine
