title: Physical dimensions, torsional performance, bending properties, and metallurgical characteristics of rotary endodontic instruments. VI. Canal Master drills.
abstract: A laboratory study was performed on machine-driven Canal Master drills to determine their physical dimensions, torsional performance, bending properties, and metallurgical characteristics in fracture. Physical dimensions were determined for each of the available sizes (#50 to #100) of Canal Master drills from the manufacturer that distributes these instruments in the United States. Samples were also tested in clockwise torsion using a Maillefer memocouple. Bending properties of cantilever specimens were measured with a Tinius Olsen stiffness tester. Bending fatigue testing was performed on a unique laboratory apparatus. Scanning electron microscope examination confirmed visual observations that the stainless steel Canal Master drills exhibited ductile torsional fracture. This study is part of a continuing investigation to establish standards for all machine-driven rotary endodontic instruments.
authors.affiliation: Wisconsin Dental Group, Milwaukee, USA.
authors.forename: N H
authors.initials: NH
authors.lastname: Luebke
authors.forename: W A
authors.initials: WA
authors.lastname: Brantley
authors.forename: Z I
authors.initials: ZI
authors.lastname: Sabri
authors.forename: F L
authors.initials: FL
authors.lastname: Luebke
authors.forename: L L
authors.initials: LL
authors.lastname: Lausten
mesh_terms: D003754:Dental High-Speed Equipment; D003799:Dental Stress Analysis; D004548:Elasticity; D004708:Endodontics / Q000295:instrumentation*; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D012390:Root Canal Therapy / Q000295:instrumentation*; D013718:Tensile Strength