A method for inserting a bone block into a patient's intervertebral space, comprising: supporting the bone block in an inserter; advancing the inserter into the intervertebral space; rotating the inserter, thereby separating adjacent vertebrae; separating the bone block and the inserter with a push rod;...http://www.google.co.uk/patents/US6368325?utm_source=gb-gplus-sharePatent US6368325 - Bone blocks and methods for inserting bone blocks into intervertebral spaces
