Physical dimensions, torsional performance, bending properties, and metallurgical characteristics of rotary endodontic instruments. VI. Canal Master drills.
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.
Luebke
N H
NH
Wisconsin Dental Group, Milwaukee, USA.
Brantley
W A
WA
Sabri
Z I
ZI
Luebke
F L
FL
Lausten
L L
LL
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