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Impact of Helix and Taper on Structural Characteristics of a Nickel-Titanium Endodontic Instrument Through Finite Element Analysis

[+] Author Affiliations
Rui He, Jun Ni

University of Michigan, Ann Arbor, MI

Charles J. Goodis

Advanced Endodontics, Albuquerque, NM

Paper No. MSEC2006-21052, pp. 413-421; 9 pages
doi:10.1115/MSEC2006-21052
From:
  • ASME 2006 International Manufacturing Science and Engineering Conference
  • Manufacturing Science and Engineering, Parts A and B
  • Ypsilanti, Michigan, USA, October 8–11, 2006
  • Conference Sponsors: Manufacturing Engineering Division
  • ISBN: 0-7918-4762-4 | eISBN: 0-7918-3786-8
  • Copyright © 2006 by ASME

abstract

The mechanical behavior of a rotary nickel-titanium endodontic instrument was evaluated through finite element models. Essential geometric features of blank taper and variable pitch were modeled and their impact on the mechanical performance of instruments was investigated. Simulation results showed that better bending flexibility and higher torsional stiffness can both be obtained on an instrument with a large helix configuration. The results also illustrated that the finite element method can be used to compute the critical load or deformation for the instrument which prompts the sustainable use of the instrument in clinical practices.

Copyright © 2006 by ASME

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