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http://dx.doi.org/10.5395/JKACD.2011.36.4.300

Evaluation of canal preparation for apical sealing with various Ni-Ti rotary instruments  

Shin, Yoo-Seok (Department of Conservative Dentistry, Microscope Center, Yonsei University)
Shin, Su-Jung (Department of Conservative Dentistry, Microscope Center, Yonsei University)
Song, Min-Ju (Department of Conservative Dentistry, Microscope Center, Yonsei University)
Kim, Eui-Seong (Department of Conservative Dentistry, Microscope Center, Yonsei University)
Publication Information
Restorative Dentistry and Endodontics / v.36, no.4, 2011 , pp. 300-305 More about this Journal
Abstract
Objectives: The aim of this study was to evaluate the various NiTi rotary instruments regarding their ability to provide a circular apical preparation. Materials and Methods: 50 single canal roots were selected, cut at the cementodentinal junction and the coronal 1/3 of the canals was flared using Gates Glidden burs. Samples were randomly divided into 5 experimental groups of 10 each. In group I, GT files, Profile 04 and Quantec #9 and #10 files were used. In Group II Lightspeed was used instead of Quantec. In Group III, Orifice shaper, Profile .06 series and Lightspeed were used. In Group IV, Quantec #9 and #10 files were used instead of Lightspeed. In Group V, the GT file and the Profile .04 series were used to prepare the entire canal length. All tooth samples were cut at 1 mm, 3 mm and 5 mm from the apex and were examined under the microscope. Results: Groups II and III (Lightspeed) showed a more circular preparation in the apical 1mm samples than the groups that used Quantec (Group I & IV) or GT files and Profile .04 series.(Group V)(p < 0.05) There was no significant difference statistically among the apical 3, 5 mm samples. In 5 mm samples, most of the samples showed complete circularity and none of them showed irregular shape. Conclusions: Lightspeed showed circular preparation at apical 1 mm more frequently than other instruments used in this study. However only 35% of samples showed circularity even in the Lightspeed Group which were enlarged 3 ISO size from the initial apical binding file (IAF) size. So it must be considered that enlarging 3 ISO size isn't enough to make round preparation.
Keywords
Apical sealing; Circular apical preparation; GT file; Lightspeed; Profile; Quantec;
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1 Paque F, Ganahl D, Peters OA. Effects of root canal preparation on apical geometry assessed by micro-computed tomography. J Endod 2009;35:1056-1059.   DOI   ScienceOn
2 Peters OA, Laib A, Gohring TN, Barbakow F. Changes in root canal geometry after preparation assessed by high-resolution computed tomography. J Endod 2001;27:1-6.   DOI   ScienceOn
3 Setzer FC, Kwon TK, Karabucak B. Comparison of apical transportation between two rotary file systems and two hybrid rotary instrumentation sequences. J Endod 2010;36:1226-1229.   DOI   ScienceOn
4 Kielt LW, Montgomery S. The effect of endosonic instrumentation in simulated curved root canals. J Endod 1987;13:215-219.   DOI   ScienceOn
5 Seidler B. Root canal fillings: an evaluation ans method. J Am Dent Assoc 1956;53:567-576.   DOI
6 Schneider SW. A comparison of canal preparations in straight and curved root canals. Oral Surg Oral Med Oral Pathol 1971;32:271-275.   DOI   ScienceOn
7 Hwang HK, Jou YT, Kim S. Sealing ability of isthmuses by different obturation techniques. J Endod 1998;24: Abstract,p283.
8 Ehrlich AD, Boyer TJ, Hicks ML, Pelleu GB, Jr. Effects of sonic instrumentation on the apical preparation of curved canals. J Endod 1989;15:200-203.   DOI   ScienceOn
9 Walton RE. Histologic evaluation of different methods of enlarging the pulp canal space. J Endod 1976;2:304-311.   DOI   ScienceOn
10 Campos JM, del Rio C. Comparison of mechanical and standard hand instrumentation techniques in curved root canals. J Endod 1990;16:230-234.   DOI   ScienceOn
11 Burstone CJ, Qin B, Morton JY. Chinese NiTi wire-a new orthodontic alloy. Am J Orthod 1985;87:445-452.   DOI   ScienceOn
12 Tharuni SL, Parameswaran A, Sukumaran VG. A comparison of canal preparation using the K-file and Lightspeed in resin blocks. J Endod 1996;22:474-476.   DOI   ScienceOn
13 Portenier I, Lutz F, Barbakow F. Preparation of the apical part of the root canal by the Lightspeed and step-back techniques. Int Endod J 1998;31:103-111.   DOI   ScienceOn
14 Chen JL, Messer HH. A comparison of stainless steel hand and rotary nickel-titanium instrumentation using a silicone impression technique. Aust Dent J 2002;47:12-20.   DOI   ScienceOn
15 Walia HM, Brantley WA, Gerstein H. An initial investigation of the bending and torsional properties of Nitinol root canal files. J Endod 1988;14:346-351.   DOI   ScienceOn
16 Schilder H. Cleaning and shaping the root canal. Dent Clin North Am 1974;18:269-296.
17 Mizrahi SJ, Tucker JW, Seltzer S. A scanning electron microscopic study of the efficacy of various endodontic instruments. J Endod 1975;1:324-333.   DOI   ScienceOn
18 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.   DOI   ScienceOn