Hyun Yang; In-Seok Yang; Yun-Chann Hwang; In-Nam Hwang; Suk-Ja Yoon; Won-Jae Kim; Won-Mann Oh

doi:10.5395/JKACD.2007.32.2.087

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Yang, Yang, Hwang, Hwang, Yoon, Kim, and Oh: A study on transportation of apical foramen after overinstrumentation by ProFile®, ProTaper™ and K3TM in simulated canals with different curvatures

Original Article

Journal of Korean Academy of Conservative Dentistry

Journal of Korean Academy of Conservative Dentistry 2007; 32(2): 87-94.

Published online: 31 March 2007

DOI: https://doi.org/10.5395/JKACD.2007.32.2.087

A study on transportation of apical foramen after overinstrumentation by ProFile®, ProTaper™ and K^3TM in simulated canals with different curvatures

Hyun Yang¹, In-Seok Yang¹, Yun-Chann Hwang¹, In-Nam Hwang¹, Suk-Ja Yoon², Won-Jae Kim³, Won-Mann Oh¹

¹Department of Conservative Dentistry, School of Dentistry, Chonnam National University, Korea.

²Department of Oral and Maxillofacial Radiology, School of Dentistry, Chonnam National University, Korea.

³Department of Oral Physiology, DSRI, 2nd stage of BK21, School of Dentistry, Chonnam National University, Korea.

Corresponding Author: Won-Mann Oh. Department of Conservative Dentistry, School of Dentistry, Chonnam National University, 8 Hak-dong, Dong-gu, Gwangju, 501-757, Korea. Tel: 82-62-220-4431, Fax: 82-62-225-8387, wmoh@chonnam.ac.kr

Received 20 February 2006 Revised 30 March 2006 Accepted 25 April 2007

(open-access):

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 was done to evaluate transportation of the apical foramen after 0.5 mm overinstrumentation by ProFile, ProTaper and K³ in simulated resin root canal.

Sixty simulated resin root canal with a curvature of J and S-shape were divided into two groups. Each group consisted of three subgroups with 10 blocks according to the instruments used: ProFile®, ProTaper™, and K^3TM. Simulated resin root canal was prepared by ProFile, ProTaper and K³ with 300 rpm by the crown-down preparation technique. Pre- and post-instrumentation apical foramen images were overlapped and recorded with Image-analyzing microscope 100X (Camcope, Sometech Inc, Korea). The amounts of difference in width and dimension on overlapped images were measured after reference points were determined by Image Analysis program (Image-Pro® Express, Media Cybernetic, USA). Data were analyzed using Kruskal-Wallis and Mann-Whitney U-test.

The results suggest that ProFile showed significantly less canal transportation and maintained original apical foramen shape better than K³ and ProTaper.

Keywords: ProFile, ProTaper, K3, Simulated J and S-shape canal

Figures and Tables

Figure 1

A and B diagrams indicate inner and outer side of canal curvature.

Figure 2

Procedure measuring the difference in width and dimensions of apical foramen. A. Measurement of difference in width of apical foramen after overlapping pre- and post-instrumentation images. (L1; Δ mesial width, L2; Δ outer width, L3; Δ distal width, L4; Δ inner width) B. Measurement of difference in dimensions of apical foramen after overlapping pre- and post-instrumentation images. (a; inner dimensions of apical foramen before instrumentation, b; outer dimensions of apical foramen before instrumentation, c; inner dimensions of apical foramen after instrumentation, d; outer dimensions of apical foramen after instrumentation)

Figure 3

ΔOuter width of apical foramen between pre- and post-instrumentation according to the types of files and curvatures.

Figure 4

ΔInner width of apical foramen between pre- and post-instrumentation according to the types of files and curvatures.

Figure 5

ΔOuter dimensions of apical foramen between pre- and post-instrumentation according to the types of files and curvatures.

Figure 6

ΔInner dimensions of apical foramen between pre- and post-instrumentation according to the types of files and curvatures.

Table 1

Shaping sequence of ProFile, ProTaper and K3

WL (Working length) = CL (Canal length) + 0.5 mm

Table 2

Mean values of difference of outer, inner width and dimensions in apical foramen (Mean ± S.D)

Other letters mean significant difference (p < 0.05).

References

1. Schilder H. Filling root canals in three dimensionss. Dent Clin North Am. 1967. 723–744.

2. Zmener O, Balbachan L. Effectiveness of nickel-titanium files for preparing curved root canals. Endod Dent Traumatol. 1995. 11:121–123.

3. Weine FS. Endodontic therapy. 1989. 4th ed. St. Louis: Mosby;277.

4. Walia H, Brantley WA, Gerstein H. An initial investigation of the bending and torsional properties of Nitinol root canal files. J Endod. 1988. 14:346–351.

5. Baumann MA. Nickel-titanium: options and challenges. Dent Clin North Am. 2004. 48:55–67.

6. Esposito PT, Cunningham CJ. A comparison of canal preparation with nickel-titanium and stainless steel instruments. J Endod. 1995. 21:173–176.

7. Park HS, Lee MG, Kim JJ, Lee JY. In the formation of curved root canals using ProFile Study on root canal shape. J Korean Acad Conserv Dent. 1999. 24:633–637.

8. Ko HJ, Baek SH. A study of histomorphological change of curved root canal preparation using GT rotary file, profile and stainless steel K-file. J Korean Acad Conserv Dent. 2002. 27:612–621.

9. Koch K, Brave D. The Ultimate Rotary File? Oral Health. 2002. 59–64.

10. Weine FS, Kelly RF, Lio PJ. The effect of preparation procedures on original canal shape and on apical foramen shape. J Endod. 1975. 1:255–262.

11. Hsu YY, Kim SK. The ProFile system. Dent Clin North Am. 2004. 48:69–85.

12. Clauder T, Baumann MA. ProTaper NT system. Dent Clin North Am. 2004. 48:87–111.

13. Mounce RE. The K3 rotary nickel-titanium file system. Dent Clin North Am. 2004. 48:137–157.

14. Bishop K, Dummer PMH. A comparison of stainless steel flexofiles and Nickel-titanium Ni-Ti flex during the shaping of simulated canals. Int Endod J. 1997. 30:25–34.

15. Coleman CL, Svec TA. Analysis of Ni-Ti versus stainless steel instrumentation in resin simulated canals. J Endod. 1997. 23:232–235.

16. 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. 37:265–271.

17. Short JA, Morgan LA, Baumgartner JC. A comparison of canal centering ability of four instrumentation tecniques. J Endod. 1997. 23:503–507.

18. Hata GI, Uemura M, Kato AS, Imura N, Novo NF, Toda T. A comparison of shaping ability using ProFile, GT file, and Flex-R endodontic instruments in simulated canals. J Endod. 2002. 28:316–321.

19. Lim JJ, Kim DJ, Hwang YC, Hwang IN, Oh WM. The change of canal configuration after instrumentation by several nickel-titanium files in the simulated canal with abrupt curvature. J Korean Acad Conserv Dent. 2005. 30:303–311.

20. Yun HY, Kim SK. A comparison of the shaping abilities of 4 nickel-titanium rotary instruments in simulated root canals. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2003. 95:228–233.

21. Walsch H. The hybride concept of nickel-titanium rotary instrumentation. Dent Clin North Am. 2004. 48:183–202.

22. Peters OA, Peters CI, Schönenberger K, Barbakow F. ProTaper rotary root canal preparation: effects of canal anatomy on final shape analysed by micro CT. Int Endod J. 2003. 36:86–92.

23. Oh HJ, Hong CH, Jo YB. The effect of niti rotary instrumentation on the configuration of apical root canal. J Korean Acad Conserv Dent. 1997. 22:244–253.

24. Lee BK, Kim DJ, Hwang YC, Hwang IN, Oh WM. A comparative study on the canal configuration after shaping by profile, protaper^tm and k-flexofile in simulated canals with different angles of curvature. J Korean Acad Conserv Dent. 2005. 30:294–302.

25. Calberson FL, Deroose CA, Hommez GM, De Moor RJ. Shaping ability of ProTaper nickel-titanium files in simulated resin root canals. Int Endod J. 2004. 37:613–623.

26. Iqbal MK, Firic S, Tulcan J, Karabucak B, Kim S. Comparison of apical transportation between ProFile and ProTaper NiTi rotary instruments. Int Endod J. 2004. 37:359–364.

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