A distractor for separating adjacent elements, such as vertebrae. The distractor preferably has a scissors-type distracting mechanism, either in a simple scissors or double-acting scissors configuration. The distractor includes blades that are removable from the jaws of the distractor such that different...http://www.google.co.uk/patents/US6712825?utm_source=gb-gplus-sharePatent US6712825 - Spinal disc space distractor
