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http://dx.doi.org/10.5395/JKACD.2005.30.4.303

THE CHANGE OF CANAL CONFIGURATION AFTER INSTRUMENTATION BY SEVERAL NICKEL-TITANIUM FILES IN THE SIMULATED CANAL WITH ABRUPT CURVATURE  

Lim, Jung-Jang (Dept. of Conservative Dentistry, School of Dentistry, DSRI, Chonnam National University)
Kim, Dong-Jun (Dept. of Conservative Dentistry, School of Dentistry, DSRI, Chonnam National University)
Hwang, Yun-Chan (Dept. of Conservative Dentistry, School of Dentistry, DSRI, Chonnam National University)
Hwang, In-Nam (Dept. of Conservative Dentistry, School of Dentistry, DSRI, Chonnam National University)
Oh, Won-Mann (Dept. of Conservative Dentistry, School of Dentistry, DSRI, Chonnam National University)
Publication Information
Restorative Dentistry and Endodontics / v.30, no.4, 2005 , pp. 303-311 More about this Journal
Abstract
The purpose of this study was to evaluate which type of Ni-Ti files are able to maintain canal configuration better in the simulated canal with abrupt curvature near it's apex. Ninety six simulated root canals were made in epoxy resin and $\sharp$15 finger spreader was used as root canal templates. The simulated root canals were made with radius of curvature of 1.5mm, 3.0mm, 4.0mm, 6.0mm respectively and the angle of curvature of all simulated canals were adjusted to 90 degree. The simulated canals were instrumented by ProFile, ProTaper, Hero 642, and $K^3$ at a 300 rpm using crown-down pressureless technique. Pre-instrumented and post-instrumented images were taken by digital camera and were superimposed with Adobe Photos hop 6.0 program. Images were compared by image analysis program. The changes of canal width at the inner and outer side of the canal curvature. canal transportation were measured at 9 measuring point with 1 mm interval. Statistical analysis among the types of Ni-Ti files was performed using Kruskal-Wallis test and Mann-Whitney U-test. The result was that ProFile maintain original canal configuration better than other engine driven Ni-Ti files in the canals above 3.0mm radius of curvature, and in the 1.5mm radius of curvature, most of Ni-Ti flies were deformed or separated during instrumentation.
Keywords
Ni-Ti file; Canal curvature; ProFile; ProTaper; Hero 642;
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  • Reference
1 Bramante CM, Berbert A, Borges RP. A methodology for evaluation of root canal instrument. J Endod 13:243-245, 1987.   DOI   ScienceOn
2 Walia H, Brantley WA, Gerstein H. An initial investigation of the bending and torsional properties of nitinol root canal files. J Endod 14:346-351, 1988.   DOI   ScienceOn
3 Coleman CL, Svec TA. Analysis of Ni-Ti versus stainless steel instrumentation in resin simulated canals. J Endod 23:232-235, 1997.   DOI   ScienceOn
4 James MG, Marden A, Carlos ER. Comparison of nickel-titanium and stainless steel hand-file instrumentation using computed tomography. J Endod 22:369-375, 1996.   DOI   ScienceOn
5 김영태, 백승호, 배광식, 임성삼, 윤수한. 세종류의 Stainless Steel File을 이용한 만곡근관 형성 후 근관형태 변화에 관한 비교 연구. 대한치과보존학회지 26:9-15, 2001.
6 Dummer PMH, Alodeh MHA. A method for the construction of simulated root canals in clear resin blocks. Int Endod J 24:63-66, 1991.   DOI   PUBMED
7 Filho IB, Esberard RM, Leonardo RT, Rio CE. Microscopic evaluation of three endodontic files preand postinstrumentation. J Endod 24:461-464, 1998.   DOI   ScienceOn
8 Schafer E, Schlingemann R. Efficiency of rotary nickel-titanium K3 instruments compared with stainless steel hand K-Flexofile. Part2. Cleaning effectiveness and shaping ability in severely curved root canals of extracted teeth. Int Endod J 36:208-217, 2003.   DOI   ScienceOn
9 임경아, 윤수한. Stainless Steel K-file, Profile .04와 Quantec LX를 이용한 만곡 근관 형성후의 근관형태의 변화에 관한 비교연구. 대한치과보존학회지 25:133-140, 2000.
10 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 28:316-321, 2002.   DOI   ScienceOn
11 Mandel E, Yazdi MA, Benhamou LM, Lachkar T, Mesgouez C, Sobel M. Rotary Ni-Ti profile systems for preparing curved canals in resin blocks : influence of operator on instrument breakage. Int Endod J 32:436-443, 1999.   DOI   PUBMED
12 Park H. A comparison of Greater Taper files, ProFiles, and stainless steel files to shape curved root canals. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 91:715-718, 2001.   DOI   ScienceOn
13 Thompson SA, Dummer PMH. Shaping ability of ProFile .04 taper series 29 rotary nickel-titanium instruments in simulated root canals. Part 1. Int Endod J 30:1-7, 1997.   DOI   ScienceOn
14 Pruett JP, Clement DJ, Carnes DL. Cyclic fatigue testing of Nickel-Titanium endodontic instruments. J Endod 23:77-85, 1997.   DOI   ScienceOn
15 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 92:215-220, 2001.   DOI   ScienceOn
16 Versumer J, Hulsmann M, Schafers F. A comparative study of root canal preparation using ProFile .04 and Lightspeed rotary Ni-Ti instruments. Int Endod J 35:37-46, 2002.   DOI   ScienceOn
17 Thompson SA, Dummer PMH. Shaping ability of Hero 642 rotary nickel-titanium instruments in simulated root canals: Part 1. Int Endod J 33:248-254, 2000.   DOI   ScienceOn
18 이석종, 신영근, 황호길. 만곡근관의 확대시 기구에 따른 형태변화에 관한 연구. 대한치과보존학회지 24:503-510, 1999.
19 Bishop K, Dummer PMH. A comparison of stainless steel Flexofiles and nickel-titanium NiTiFlex files during the shaping of simulated canals. Int Endod J 30:25-34, 1997.   DOI   ScienceOn
20 Kum KY, Spangberg L, Cha BY, Jung IY, Lee SJ, Lee CY. Shaping ability of three ProFile rotary instrumentation techniques in simulated resin root canals. J Endod 26:719-723, 2000.   DOI   ScienceOn
21 Thompson SA, Dummer PMH. Shaping ability of ProFile .04 taper series 29 rotary nickel-titanium instruments in simulated root canals. Part 2. Int Endod J 30:8-15, 1997.   DOI
22 박한수, 이민구, 김종진, 이종엽. Profile을 이용한 만곡근관 형성시 근관의 형태에 관한 연구. 대한치과보존학회지 24:633-637, 1999.
23 Esposito PT, Cunningham CJ. A comparison of canal preparation with nickel-titanium and stainless steel instruments. J Endod 21:173-176, 1995.   DOI   ScienceOn
24 Royal JR, Donnelly JC. A comparison of maintenance of canal curvature using balanced-forced instrumentation with three difference file type. J Endod 21:300-304, 1995.   DOI   ScienceOn
25 박한수, 이민구, 김종진, 임영준, 장문성, 이종엽. 'Three-File' 방식에 의한 만곡 근관 형성시 근관의 형태에 관한 연구. 대한치과보존학회지 25:494-497, 2000.