J Korean Acad Conserv Dent.  2005 Jan;30(1):38-48. 10.5395/JKACD.2005.30.1.038.

Relative efficacy of three Ni-Ti file systems used by undergraduates

Affiliations
  • 1Department of Conservative Dentistry, College of Dentistry, Pusan National University, Korea. bhur@pusan.ac.kr

Abstract

The purpose of this study was to compare and evaluate the shaping ability of the three different Ni-Ti file systems used by undergraduate students. Fifty undergraduate students prepared 150 simulated curved root canals in resin blocks with three Ni-Ti file systems - ProFile(R) (PF), Manual ProTaper(R) (MPT), Rotary ProTape(R) (RPT). Every student prepared 3 simulated root canals with each system respectively. After root canal preparation, the Ni-Ti files were evaluated for distortion or breakage. Assessments were made according to the presence of various types of canal aberrations. The pre- and post-instrumented canal images were attained and superimposed. The instrumented root canal width were measured and calculated for the net transportation (deviation) and the centering ratio. Under the condition of this study, both ProTaper(R) systems allowed significantly more removal of root canal wall than the ProFile(R) system. In the important other aspects such as the centering ratio, there was no significant differences between the systems. Novice dental students were able to prepare curved root canals with any kinds of Ni-Ti file systems with little aberration and great conservation of tooth structure. Students want to learn effective methods and at the same time simple rotary procedures. The rotary ProTaper(R) systems were one of the most compatible to these students from the point of view of cutting ability. The ProFile(R) system was also compatible in safe and gentle shaping.

Keyword

Undergraduates; Ni-Ti file system; Shaping ability; Centering ratio

MeSH Terms

Dental Pulp Cavity
Humans
Root Canal Preparation
Students, Dental
Tooth
Transportation

Figure

  • Figure 1 Instrumented canal width and net transportation.

  • Figure 2 Three representative superimposed images after instrumentation by each Ni-Ti file systems; (Left) ProFile®, (Mid) manual ProTaper®, (Right) rotary ProTaper®. The three horizontal lines mean the measured levels of 1 mm, 3 mm, and 5 mm.


Cited by  6 articles

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Comparison of shaping ability of rotary Ni-Ti file systems used by undergraduates
Mun-Seong Kang, Hyeon-Cheol Kim, Bock Hur, Jeong-Kil Park
J Korean Acad Conserv Dent. 2006;31(1):1-10.    doi: 10.5395/JKACD.2006.31.1.001.

Comparison of shaping ability between single length technique and crown-down technique using Mtwo rotary file
Yoo-Kyoung Lim, Jeong-Kil Park, Bock Hur, Hyeon-Cheol Kim
J Korean Acad Conserv Dent. 2007;32(4):385-396.    doi: 10.5395/JKACD.2007.32.4.385.

Comparison of shaping ability using various Nickel-Titanium rotary files and hybrid technique
Jung-Won Kim, Jeong-Kil Park, Bock Hur, Hyeon-Cheol Kim
J Korean Acad Conserv Dent. 2007;32(6):530-541.    doi: 10.5395/JKACD.2007.32.6.530.

Stress distribution of three NiTi rotary files under bending and torsional conditions using 3-dimensional finite element analysis
Tae-Oh Kim, Chan-Joo Lee, Byung-Min Kim, Jeong-Kil Park, Bock Hur, Hyeon-Cheol Kim
J Korean Acad Conserv Dent. 2008;33(4):323-331.    doi: 10.5395/JKACD.2008.33.4.323.

Prognostic factors influencing clinical outcome of nonsurgical endodontic treatment
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J Korean Acad Conserv Dent. 2010;35(6):436-444.    doi: 10.5395/JKACD.2010.35.6.436.


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