title: The use of an ultrasonic technique to remove a fractured rotary nickel-titanium instrument from the apical third of a curved root canal.
abstract: The frequency of use of nickel-titanium rotary instruments in endodontic practice is increasing. One occasionally mentioned problem is fracture of an instrument within the root canal. The broken instrument may prevent access to the root apex, impeding optimal cleaning and shaping procedures. A case report is presented which uses a modern technique, utilising a staging platform and the use of newly designed ultrasonic tips with direct visualisation through a dental operating microscope, to remove a fractured rotary nickel-titanium instrument from the apical third of a curved root canal.
authors.affiliation: School of Dental Science, The University of Melbourne.
authors.forename: Jeff R
authors.initials: JR
authors.lastname: Ward
mesh_terms: D000328:Adult; D003722:Dental Alloys; D003786:Dental Pulp Cavity / Q000473:pathology*; D004868:Equipment Failure; D005260:Female; D005500:Follow-Up Studies; D005547:Foreign Bodies / Q000628:therapy*; D006801:Humans; D008853:Microscopy / Q000295:instrumentation; D009532:Nickel; D018915:Root Canal Preparation / Q000009:adverse effects / Q000295:instrumentation*; D014025:Titanium; D019227:Tooth Apex / Q000473:pathology*; D014465:Ultrasonics
chemical_list: D003722:Dental Alloys; C040654:titanium nickelide; D009532:Nickel; D014025:Titanium