Open Access, Peer-reviewed
eISSN 2234-7666
    J Korean Acad Conserv Dent. 2005 Jul;30(4):327-334. Korean.
    Published online Jul 30, 2005.
    https://doi.org/10.5395/JKACD.2005.30.4.327
    Copyright © 2005 Korean Academy of Conservative Dentistry
    Original Article

    Effect of anticurvature filing method on preparation of the curved root canal using ProFile

    Hyun-Ji Song, Juhea Chang,1 Kyung-Mo Cho and Jin-Woo Kim
      • Department of Conservative Dentistry, College of Dentistry, Kangnung National University, Korea.
      • 1Department of Operative Dentistry, Indiana University, School of Dentistry, USA.
    • Corresponding author: Jin-Woo Kim. Department of Conservative Dentistry, College of Dentistry, Kangnung National University, Jibyun-Dong, Kangnung City, Kangwon-Do, Korea, 210-702. Tel: 82-33-640-3189, Fax: 82-33-640-3113, Email: mendo7@kangnung.ac.kr
    Received January 11, 2005; Revised March 14, 2005; Accepted April 14, 2005.

    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.

    Abstract

    This study investigated the effect of anticurvature filing method on preparation of the curved root canal using ProFile.

    Thirty six resin blocks were divided equally into three groups by instrumentation motions: anticurvature filing motion, circumferential filing motion and straight up-and-down motion. Each resin block was sectioned at 8 mm level from the apex and at the greatest curvature of the canal and reassembled in metal mold by a modified Bramante technique. All groups were instrumented with the ProFile system. At each levels, image of sectioned surface were taken using CCD camera under a stereomicroscope at ×40 magnification and stored. Distances of transportation at the inner and outer area of curvature and the centering ratio were determined and compared by statistical analysis, along with the assessment of the increase of root canal cross-sectional area.

    The results were as follows;

    1. In all groups, there was no statistical difference in the mean increase of root canal cross-sectional area, the centering ratio, and the mean distances of transportation at the inner area of curvature at each level.

    2. At 8 mm level from the apex, the mean distances of transportation at the outer area of curvature decreases in following order anticurvature filing motion, circumferential filing motion, straight up-and-down motion but, no significant difference at the greatest curvature of the canal among three groups.

    Effect of anticurvature filing motion using ProFile does not seem to be different from other instrumentation motions at the inner area of curvature in curved root canal.

    Keywords
    Curved canal; Cross-sectional area; Profile; Anticurvature filing motion

    Figures

    Figure 1
    Levels of cross-section.

    a: 8 mm level from the apex

    b: the greatest curvature of the canal

    Tables

    Table 1
    Mean increase of root canal cross-sectional areas at each level in three groups (Unit: mm2, Mean ± S.D.)

    Table 2
    Mean distances of transportation at the inner area of curvature (Unit: mm, Mean ± S.D.)

    Table 3
    Mean distances of transportation at the outer area of curvature (Unit: mm, Mean ± S.D.)

    Table 4
    Mean centering ratio for each level in three group (Mean ± S.D.)

    References

      1. Schilder H. Cleaning and shaping the root canal. Dent Clin North Am 1974;18(2):269–296.
      1. Skidmore AE, Bjorndal AM. Root canal morphology of the human mandibular first molar. Oral Surg Oral Med Oral Pathol 1971;32(5):778–784.
      1. Weine F, Kelly RF, Lio PJ. The effect of preparation procedures on original canal shape and on apical foramen shape. J Endod 1975;(8):255–262.
      1. Meister F, Lommel TJ, Gerstein H, Davies FE. Endodontic perforation which resulted in alveolar bone loss. Oral Surg Oral Med Oral Pathol 1979;47(5):463–470.
      1. Abou-Rass M, Frank AL, Glick DH. The anticurvature filing method to prepare the curved root canal. J Am Dent Assoc 1980;101(5):792–794.
      1. Tidmarsh BG. Preparation of the root canal. Int Endod J 1982;15(2):53–61.
      1. Goerig AC, Michelich RJ, Schultz HH. Instrumentation of root canals in molar using the step-down technique. J Endod 1982;8(12):550–554.
      1. Kessler JR, Peters DD, Lorton L. Comparison of the relative risk of molar root perforations using various endodontic instrumentation techniques. J Endod 1983;9(10):439–447.
      1. Glossen CR, Haller RH, Dove SB, del Rio CE. A comparison of root canal preparations using Ni-Ti hand, Ni-Ti engine-driven, and K-Flex endodontic instruments. J Endod 1995;21(3):146–151.
      1. Calhoun G, Montgomery S. The effects of four instrumentation techniques on root canal shape. J Endod 1988;14(6):273–277.
      1. Thompson SA, Dummer PM. Shaping ability of Hero 642 rotary nickel-titanium instruments in simulated root canals Part 2. Int Endod J 2000;33(3):255–261.
      1. Schafer E. Shaping ability of Hero 642 rotary nickel-titanium instruments and stainless steel hand K-Flexofiles in simulated curved root canals. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2001;92(2):215–220.
      1. Thompson SA, Dummer PM. Shaping ability of Mity Roto 360 degrees and Naviflex rotary nickel-titanium instruments in simulated root canals. Part 1. J Endod 1998;24(2):128–134.
      1. Luiten DJ, Morgan LA, Baugartner JC, Marshall JG. A comparison of four instrumentation techniques on apical canal transportation. J Endod 1995;21(1):26–32.
      1. Bramante CM, Berbert A, Borges RP. A methodology for evaluation of root canal instrumentation. J Endod 1987;13(5):243–245.
      1. Weine FS. In: Endodontic Therapy. 5th ed. St. Louis: Mosby Inc; 1996. pp. 330-331.
      1. Lim KC, Webber J. The validity of simulated root canals for the investigation of the prepared root canal shape. Int Endod J 1985;18(4):240–246.
      1. Dummer PMH, Alodeh MHA. A method for the construction of simulated root canals in clear resin blocks. Int Endod J 1991;24(2):63–66.
      1. Thompson SA, Dummer PM. Shaping ability of ProFile .04 taper series 29 rotary nickel-titanium instruments in simulated root canals Part 1. Int Endod J 1997;30(1):1–7.
      1. Thompson SA, Dummer PM. Shaping ability of Hero 642 rotary nickel-titanium instruments in simulated root canals Part 1. Int Endod J 2000;33(3):248–254.
      1. Peters OA, Barbakow F. Dynamic torque and apical forces of ProFile .04 rotary instruments during preparation of curved canals. Int Endod J 2002;35(4):379–389.
      1. Bonetti Filho I, Miranda Esberard R, de Toledo Leonardo R, del Rio CE. Microscopic evaluation of three endodontic files pre- and post-instrumentation. J Endod 1998;24(7):461–464.
      1. Lim SS, Stock CJ. The risk of perforation in the curved canal: anticurvature filing compared with the step-back technique. Int Endod J 1987;20(1):33–39.
      1. Song YL, Bian Z, Fan B, Fan MW, Gutmann JL, Peng B. A comparison of instrument-centering ability within the root canal for three contemporary instrumentation techniques. Int Endod J 2004;37(4):265–271.
      1. Lee CH, Cho KM, Hong CU. Effect of various canal preparation techniques using rotary nickel-titanium files on the maintenance of canal curvature. J Korean Acad Conserv Dent 2003;28(1):41–49.
      1. Park SH, Cho KM, Kim JW. The efficiency of the NiTi rotary files in curved simulated canals shaped by novice operators. J Korean Acad Conserv Dent 2003;28(2):146–155.
      1. Choi SD, Jin MU, Kim KO, Kim SK. Shaping ability of four rotary nickel-titanium instruments to prepare root canal at danger zone. J Korean Acad Conserv Dent 2004;29(5):446–453.
    MeSH Terms
    Dental Pulp Cavity*
    Fungi
    Transportation
    Metrics
    Share
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    Tables
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