A method of cleaning and shaping a root canal in a tooth in preparation for filling the root canal with a filler material, such as gutta percha, as a part of an endodontic procedure includes the step of inserting into the root canal a tapered file having a spiraled scraping edge formed thereon, the scraping...http://www.google.com.au/patents/US6106296?utm_source=gb-gplus-sharePatent US6106296 - Method of endodontic preparation of a root canal and a file set for use in the method
