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HOME > Restor Dent Endod > Volume 40(1); 2015 > Article
Readers' Forum Safe way for using NiTi rotary files
Seok-Woo Chang
2015;40(1):-96.
DOI: https://doi.org/10.5395/rde.2015.40.1.96
Published online: January 12, 2015

Kyung Hee University, Korea.

©Copyrights 2015. The Korean Academy of Conservative Dentistry.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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How can I use my NiTi rotary files more efficiently and more safely without separation?
In the clinical practice, it is much more efficient to use NiTi rotary files compared to hand instrumentation. However, misuse of NiTi rotary files can result in procedural errors such as transportation, ledge, perforation, and file separation. Generally, following suggestions could be considered to avoid these errors.

  1. Enlarge the coronal half of the root canal before preparing the apical part.1 This provides a more direct path to the apex of the root canal and reduces coronal resistance.

  2. Make a glide path with small size files (sizes 10 - 20). This allows preservation of pathway to the working length and reduces the formation of transportations and ledges.2

  3. Use a small file (size 10) to establish and maintain patency. This would be helpful in reducing transportation and respecting the original canal shapes.3

  4. Limit the use of NiTi rotary files within the working length. The overzealous use of NiTi rotary files (especially beyond apical foramen) could cause cracks in apical roots.4,5

Readers' forum is edited by Professor Kyung-Mo Cho (Gangneung-Wonju National University).
  • 1. Hargreaves KM, Cohen S. Pathways of the pulp. 10th ed. St. Louis: Mosby Elsevier; 2011. p. 321.
  • 2. Elnaghy AM, Elsaka SE. Evaluation of root canal transportation, centering ratio, and remaining dentin thickness associated with ProTaper Next instruments with and without glide path. J Endod 2014;40:2053-2056.PubMed
  • 3. Cailleteau JG, Mullaney TP. Prevalence of teaching apical patency and various instrumentation and obturation techniques in United States dental schools. J Endod 1997;23:394-396.ArticlePubMed
  • 4. Adorno CG, Yoshioka T, Suda H. Crack initiation on the apical root surface caused by three different nickel-titanium rotary files at different working lengths. J Endod 2011;37:522-525.ArticlePubMed
  • 5. Karataş E, Gündüz HA, Kırıcı DO, Arslan H, Topçu MC, Yeter KY. Dentinal Crack Formation during Root Canal Preparations by the Twisted File Adaptive, ProTaper Next, ProTaper Universal, and WaveOne Instruments. J Endod 2014 12 02 doi: 10.1016/j.joen.2014.10.019. [Epub ahead of print].

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REFERENCES

  • 1. Hargreaves KM, Cohen S. Pathways of the pulp. 10th ed. St. Louis: Mosby Elsevier; 2011. p. 321.
  • 2. Elnaghy AM, Elsaka SE. Evaluation of root canal transportation, centering ratio, and remaining dentin thickness associated with ProTaper Next instruments with and without glide path. J Endod 2014;40:2053-2056.PubMed
  • 3. Cailleteau JG, Mullaney TP. Prevalence of teaching apical patency and various instrumentation and obturation techniques in United States dental schools. J Endod 1997;23:394-396.ArticlePubMed
  • 4. Adorno CG, Yoshioka T, Suda H. Crack initiation on the apical root surface caused by three different nickel-titanium rotary files at different working lengths. J Endod 2011;37:522-525.ArticlePubMed
  • 5. Karataş E, Gündüz HA, Kırıcı DO, Arslan H, Topçu MC, Yeter KY. Dentinal Crack Formation during Root Canal Preparations by the Twisted File Adaptive, ProTaper Next, ProTaper Universal, and WaveOne Instruments. J Endod 2014 12 02 doi: 10.1016/j.joen.2014.10.019. [Epub ahead of print].

Citations

Citations to this article as recorded by  
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    Safe way for using NiTi rotary files
    Restor Dent Endod. 2015;40(1):96-96.   Published online January 12, 2015
    DOI: https://doi.org/10.5395/rde.2015.40.1.96
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Safe way for using NiTi rotary files
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