The invention includes a system and method for loosening of tissue. In one embodiment, an intervertebral tissue removal system includes at least one abrading member for abrading tissue in an area to be cleared and at least one expandable member operable to be expanded from a first condition to a second...http://www.google.co.uk/patents/US20080177294?utm_source=gb-gplus-sharePatent US20080177294 - Expandable intervertebral tool system and method
