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Cheol-Hwan Lee 1 Article
Effect of various canal preparation techniques using rotary nickel-titanium files on the maintenance of canal curvature
Cheol-Hwan Lee, Kyung-Mo Cho, Chan-Ui Hong
J Korean Acad Conserv Dent 2003;28(1):41-49.   Published online January 31, 2003
DOI: https://doi.org/10.5395/JKACD.2003.28.1.041
AbstractAbstract PDFPubReaderePub

There are increasing usage of Nickel-Titanium rotary files in modern clinical endodontic treatment because it is effective and faster than hand filing due to reduced step.

This study was conducted to evaluate the effect of canal preparations using 3 different rotary Nickel-Titanium files that has different cross sectional shape and taper on the maintenance of canal curvature. Simulated resin block were instrumented with Profile(Dentsply, USA), GT rotary files(Dentsply, USA), Hero 642(Micro-Mega, France), and Pro-Taper(Dentsply, USA).

The image of Pre-instrumentation and Post-instrumentation were acquired using digital camera and overspreaded in the computer. Then the total differences of canal diameter, deviation at the outer portion of curvature, deviation at the inner portion of curvature, movement of center of the canal and the centering ratio at the pre-determined level from the apex were measured.

Results were statistically analyzed by means of ANOVA, followed by Scheffe test at a significance level of 0.05.

The results were as follows;

1. Deviation at the outer portion of curvature, deviation at the inner portion of curvature were showed largest in Pro-Taper, so also did in the total differences of canal diameter(p<0.05).

2. All the groups showed movements of center. Profile combined with GT rotary files and Hero 642 has no difference but Pro-Taper showed the most deviation(p<0.05).

3. At the 1, 2, 3mm level from the apex movements of center directed toward the outer portion of curvature, but in 4, 5 mm level directed toward the inner portion of curvature(p<0.05).

As a results of this study, it could be concluded that combined use of other Nickel-Titanium rotary files is strongly recommended when use Pro-Taper file because it could be remove too much canal structure and also made more deviation of canal curvature than others.

Citations

Citations to this article as recorded by  
  • Stress distribution of three NiTi rotary files under bending and torsional conditions using a mathematic analysis
    T. O. Kim, G. S. P. Cheung, J. M. Lee, B. M. Kim, B. Hur, H. C. Kim
    International Endodontic Journal.2009; 42(1): 14.     CrossRef
  • Comparison of shaping ability using various Nickel-Titanium rotary files and hybrid technique
    Jung-Won Kim, Jeong-Kil Park, Bock Hur, Hyeon-Cheol Kim
    Journal of Korean Academy of Conservative Dentistry.2007; 32(6): 530.     CrossRef
  • A study of insertion depth of buchanan plugger after shaping using NI-TI rotary files in simulated resin root canals
    Youn-Sik Park, Dong-Jun Kim, Yun-Chan Hwang, In-Nam Hwang, Won-Mann Oh
    Journal of Korean Academy of Conservative Dentistry.2006; 31(2): 125.     CrossRef
  • Step by step analysis of root canal instrumentation with ProTaper®
    Mi-Hee Kim, Bock Huh, Hyeon-Cheol Kim, Jeong-Kil Park
    Journal of Korean Academy of Conservative Dentistry.2006; 31(1): 50.     CrossRef
  • Effect of anticurvature filing method on preparation of the curved root canal using ProFile
    Hyun-Ji Song, Juhea Chang, Kyung-Mo Cho, Jin-Woo Kim
    Journal of Korean Academy of Conservative Dentistry.2005; 30(4): 327.     CrossRef
  • A comparison of shaping ability of the three ProTaper® instrumentation techniques in simulated canals
    So-Youn Kim, Jeong-Kil Park, Bock Hur, Hyeon-Cheol Kim
    Journal of Korean Academy of Conservative Dentistry.2005; 30(1): 58.     CrossRef
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