Journal of Endodontics
Volume 33, Issue 12 , Pages 1477-1480 , December 2007

Influence of Previous Angular Deformation on Flexural Fatigue Resistance of K3 Nickel–Titanium Rotary Instruments

  • Fabiola Ormiga Galvão Barbosa, MSc

      Affiliations

    • Department of Metallurgy and Materials, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
    • ,
  • José Antônio da Cunha Ponciano Gomes, MSc

      Affiliations

    • Department of Metallurgy and Materials, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
    • Corresponding Author InformationAddress requests for reprints to Dr José Antônio da Cunha Ponciano Gomes, Av Ipiranga, 910/02, Petrópolis, RJ, CEP 25610-150, Brazil.
    • ,
  • Marcos Cesar Pimenta de Araújo, DSc

      Affiliations

    • Department of Edodontics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.

References 

  1. Sotokawa T. An analysis of clinical breakage of root canal instruments. J Endod. 1988;14:75–82
  2. Ankrum MT, Hartwell GR, Truitt JE. K3 Endo, ProTaper, and ProFile systems: breakage and distortion in severely curved roots of molars. J Endod. 2004;30:234–237
  3. Alapati SB, Brantley WA, Svec TA, Powers JM, Nusstein JM, Daehn GS. SEM observations of nickel-titanium rotary endodontic instruments that fractured during clinical use. J Endod. 2005;31:40–43
  4. Yared GM, Bou Dagher FE, Machtou P. Cyclic fatigue of Profile rotary instruments after simulated clinical use. Int Endod J. 1999;32:115–119
  5. Yared GM, Bou Dagher FE, Machtou P. Cyclic fatigue of ProFile rotary instruments after clinical use. Int Endod J. 2000;33:204–207
  6. Gambarini G. Cyclic fatigue of nickel-titanium rotary instruments after clinical use with low- and high-torque endodontic motors. J Endod. 2001;27:772–774
  7. Yared G, Kulkarni GK, Ghossayn F. An in vitro study of the torsional properties of new and used K3 instruments. Int Endod J. 2003;36:764–769
  8. Booth JR, Scheetz JP, Lemons JE, Eleazer PD. A comparison of torque required to fracture three different nickel-titanium rotary instruments around curves of the same angle but of different radius when bound at the tip. J Endod. 2003;29:55–57
  9. Ullmann CJ, Peters OA. Effect of cyclic fatigue on static fracture loads in ProTaper nickel-titanium rotary instruments. J Endod. 2005;31:183–186
  10. Barbosa FOG, Gomes JACP, Araújo MCP. Influence of sodium hypochlorite on mechanical properties of K3 nickel-titanium rotary instruments. J Endod. 2007;33:982–985
  11. Barbosa FOG, Gomes JACP, Araújo MCP. A study on the fracture mechanism caused by fatigue of endodontic NiTi rotary files. Proceedings of the 4th Latin American Congress of Artificial Organs and Biomaterials; 2006 Aug 8-11; Caxambu, Brazil.
  12. Yared GM, Bou Dagher FE, Machtou P. Influence of rotational speed, torque and operator’s proficiency on ProFile failures. Int Endod J. 2001;34:47–53
  13. Sattapan B, Nervo GJ, Palamara JEA, Messer HH. Defects in rotary nickel-titanium files after clinical use. J Endod. 2000;26:161–165
  14. Walia H, Brantley WA, Gerstein H. An initial investigation of the bending and torsional properties of NiTinol root canal files. J Endod. 1988;14:346–351
  15. Pruett JP, Clement DJ, Carnes DL. Cyclic fatigue testing of nickel-titanium endodontic instruments. J Endod. 1997;23:77–85
  16. Cheung GSP, Peng B, Bian Z, Shen Y, Darvell BW. Defects in ProTaper S1 instruments after clinical use: fractographic examination. Int Endod J. 2005;38:802–809
  17. Yao JH, Schwartz SA, Beeson TJ. Cyclic fatigue of three types of rotary nickel-titanium files in a dynamic model. J Endod. 2006;32:55–57

 Supported by FAPERJ and CNPq.

PII: S0099-2399(07)00837-0

doi: 10.1016/j.joen.2007.08.014

Journal of Endodontics
Volume 33, Issue 12 , Pages 1477-1480 , December 2007

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