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HOME > Restor Dent Endod > Volume 30(4); 2005 > Article
Original Article Effect of anticurvature filing method on preparation of the curved root canal using ProFile
Hyun-Ji Song, Juhea Chang1, Kyung-Mo Cho, Jin-Woo Kim
2005;30(4):-334.
DOI: https://doi.org/10.5395/JKACD.2005.30.4.327
Published online: July 30, 2005

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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, mendo7@kangnung.ac.kr
• Received: January 11, 2005   • Revised: March 14, 2005   • Accepted: April 14, 2005

Copyright © 2005 Korean Academy of Conservative Dentistry

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  • 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.
  • 1. Schilder H. Cleaning and shaping the root canal. Dent Clin North Am. 1974;18(2):269-296.ArticlePubMed
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  • 3. 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.ArticlePubMed
  • 4. 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.PubMed
  • 5. 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.ArticlePubMed
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  • 7. Goerig AC, Michelich RJ, Schultz HH. Instrumentation of root canals in molar using the step-down technique. J Endod. 1982;8(12):550-554.ArticlePubMed
  • 8. 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.ArticlePubMed
  • 9. 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.ArticlePubMed
  • 10. Calhoun G, Montgomery S. The effects of four instrumentation techniques on root canal shape. J Endod. 1988;14(6):273-277.ArticlePubMed
  • 11. 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.ArticlePubMed
  • 12. 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.ArticlePubMed
  • 13. 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.PubMed
  • 14. 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.ArticlePubMed
  • 15. Bramante CM, Berbert A, Borges RP. A methodology for evaluation of root canal instrumentation. J Endod. 1987;13(5):243-245.ArticlePubMed
  • 16. Weine FS. Endodontic Therapy. 1996;5th ed. St. Louis: Mosby Inc; 330-331.
  • 17. 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.ArticlePubMed
  • 18. 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.ArticlePubMed
  • 19. 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.ArticlePubMed
  • 20. 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.ArticlePubMed
  • 21. 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.ArticlePubMed
  • 22. 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.ArticlePubMed
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  • 27. 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.Article
Figure 1
Levels of cross-section.
a: 8 mm level from the apex
b: the greatest curvature of the canal
jkacd-30-327-g001.jpg
Table 1
Mean increase of root canal cross-sectional areas at each level in three groups (Unit: mm2, Mean ± S.D.)
jkacd-30-327-i001.jpg
Table 2
Mean distances of transportation at the inner area of curvature (Unit: mm, Mean ± S.D.)
jkacd-30-327-i002.jpg
Table 3
Mean distances of transportation at the outer area of curvature (Unit: mm, Mean ± S.D.)

*: Statistically significant difference, p < 0.05 by Scheffe test

jkacd-30-327-i003.jpg
Table 4
Mean centering ratio for each level in three group (Mean ± S.D.)

*: Statistically significant difference, p < 0.05 by Scheffe test

jkacd-30-327-i004.jpg

Tables & Figures

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        Effect of anticurvature filing method on preparation of the curved root canal using ProFile
        J Korean Acad Conserv Dent. 2005;30(4):327-334.   Published online July 30, 2005
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      Effect of anticurvature filing method on preparation of the curved root canal using ProFile
      Image
      Figure 1 Levels of cross-section. a: 8 mm level from the apex b: the greatest curvature of the canal
      Effect of anticurvature filing method on preparation of the curved root canal using ProFile

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

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

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

      *: Statistically significant difference, p < 0.05 by Scheffe test

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

      *: Statistically significant difference, p < 0.05 by Scheffe test

      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.)

      *: Statistically significant difference, p < 0.05 by Scheffe test

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

      *: Statistically significant difference, p < 0.05 by Scheffe test


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