Apparatus and a method of inserting spinal implants is disclosed in which an intervertebral space is first distracted, a hollow sleeve having teeth at one end is then driven into the vertebrae adjacent that disc space. A drill is then passed through the hollow sleeve removing disc and bone in preparation...http://www.google.ca/patents/US20020077641?utm_source=gb-gplus-sharePatent US20020077641 - Apparatus and method of inserting spinal implants
