An endoscopic rotary abrader allowing for increased burr size while maintaining the required minimum clearance between the burr and the hood. This is accomplished either by an offset configuration of non-concentric inner and outer tubes, where the inner tube is shifted laterally away from the hood, or...http://www.google.fr/patents/US8062319?utm_source=gb-gplus-shareBrevet US8062319 - Endoscopic rotary abrader
