An endodontic instrument set of progressively smaller sizes adapted for use in performing root canal therapy and a method of using the instrument set are provided. Each of the instruments have an elongated shaft comprising a proximal end and a distal end and a short enlarged continuously tapered working...http://www.google.ca/patents/US20050186534?utm_source=gb-gplus-sharePatent US20050186534 - Endodontic instrument set and method of using the same
