Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
권호 표지
DOI QR코드

DOI QR Code

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

수종의 엔진구동형 니켈-타이타늄 파일에 의한 급한 만곡의 근관 성형시 근관형태 변화에 대한 비교연구

  • 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)
  • 임중장 (전남대학교 치과대학 치과보존학교실 치의학 연구소) ;
  • 김동준 (전남대학교 치과대학 치과보존학교실 치의학 연구소) ;
  • 황윤찬 (전남대학교 치과대학 치과보존학교실 치의학 연구소) ;
  • 황인남 (전남대학교 치과대학 치과보존학교실 치의학 연구소) ;
  • 오원만 (전남대학교 치과대학 치과보존학교실 치의학 연구소)
  • Published : 2005.07.01
Download PDF
⟨ Previous Next ⟩

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.

본 연구는 치근첨부위의 급한 만곡을 가진 근관에서 엔진구동형 니켈-타이타늄기구를 이용해 근관 성형시 근관형태 변화에 대한 비교 연구를 함으로써 어떤 기구가 근관의 본래 형태를 잘 유지하는가를 구명하기 위하여 시행되었다. $\sharp$15 finger spreader를 이용해 만곡된 근관의 주형을 형성하고 epoxy resin으로 모형 근관을 갖는 레진 블록 96개를 제작하였다. 모형 근관은 만곡의 반경이 1.5mm, 3.0mm, 4.0mm 및 6.0mm를 가지며, 근관의 만곡도는 90도로 제작하였다. 엔진구동형 니켈-타이탸늄 파일로 ProFile, ProTaper, Hero 642 그리고 $K^3$를 사용하였으며 크라운다운법을 이용하여 제조회사의 지시에 따라 300rpm으로 근관을 성형하였다 시술 전$\cdot$후 사진을 디지털 카메라를 이용하여 촬영한 후, 이미지분석기를 이용하여 근관의 변화량을 측정하였다. 근관의 만곡을 따라서 치근첨으로부터 1mm간격으로 계측점을 총 9부분을 설정하여 원래의 근관형태가 유지되는 정도를 측정하였다 각 계측점 에서 근관의 중심축의 변위량, 근관의 폭의 변화량을 측정하였다. 계측점에서 각 기구들간의 유의성은 Kruskal-Wallis 분석법을 이용하였고 기구간에 검정은 Mann-Whitney U-test분석법을 이용한 결과 급격히 만곡된 근관 성형시에 반경 1.5mm의 만곡에서는 엔진구동형 니켈-타이타늄 파일을 사용시 주의를 요하며, 반경 3.0mm 이상의 만곡에서는 다른 엔진구동형 니켈-타이타늄 파일보다는 ProFile의 사용이 권고된다.

Keywords

References

  1. 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. https://doi.org/10.1046/j.1365-2591.1999.00239.x
  2. Bramante CM, Berbert A, Borges RP. A methodology for evaluation of root canal instrument. J Endod 13:243-245, 1987. https://doi.org/10.1016/S0099-2399(87)80099-7
  3. 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. https://doi.org/10.1016/S0099-2399(06)81005-8
  4. Esposito PT, Cunningham CJ. A comparison of canal preparation with nickel-titanium and stainless steel instruments. J Endod 21:173-176, 1995. https://doi.org/10.1016/S0099-2399(06)80560-1
  5. 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. https://doi.org/10.1016/S0099-2399(88)80196-1
  6. 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. https://doi.org/10.1046/j.1365-2591.2000.00287.x
  7. 박한수, 이민구, 김종진, 임영준, 장문성, 이종엽. 'Three-File' 방식에 의한 만곡 근관 형성시 근관의 형태에 관한 연구. 대한치과보존학회지 25:494-497, 2000.
  8. Coleman CL, Svec TA. Analysis of Ni-Ti versus stainless steel instrumentation in resin simulated canals. J Endod 23:232-235, 1997. https://doi.org/10.1016/S0099-2399(97)80053-2
  9. 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. https://doi.org/10.1097/00004770-200204000-00014
  10. 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. https://doi.org/10.1111/j.1365-2591.1997.tb01095.x
  11. 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. https://doi.org/10.1067/moe.2001.114159
  12. 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. https://doi.org/10.1016/S0099-2399(96)80221-4
  13. 김영태, 백승호, 배광식, 임성삼, 윤수한. 세종류의 Stainless Steel File을 이용한 만곡근관 형성 후 근관형태 변화에 관한 비교 연구. 대한치과보존학회지 26:9-15, 2001.
  14. Dummer PMH, Alodeh MHA. A method for the construction of simulated root canals in clear resin blocks. Int Endod J 24:63-66, 1991. https://doi.org/10.1111/j.1365-2591.1991.tb00809.x
  15. 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. https://doi.org/10.1097/00004770-200012000-00013
  16. 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. https://doi.org/10.1067/moe.2001.114622
  17. Filho IB, Esberard RM, Leonardo RT, Rio CE. Microscopic evaluation of three endodontic files preand postinstrumentation. J Endod 24:461-464, 1998. https://doi.org/10.1016/S0099-2399(98)80046-0
  18. 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. https://doi.org/10.1111/j.1365-2591.1997.tb01093.x
  19. Pruett JP, Clement DJ, Carnes DL. Cyclic fatigue testing of Nickel-Titanium endodontic instruments. J Endod 23:77-85, 1997. https://doi.org/10.1016/S0099-2399(97)80250-6
  20. 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. https://doi.org/10.1046/j.1365-2591.2003.00644.x
  21. 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. https://doi.org/10.1046/j.1365-2591.2002.00454.x
  22. 박한수, 이민구, 김종진, 이종엽. Profile을 이용한 만곡근관 형성시 근관의 형태에 관한 연구. 대한치과보존학회지 24:633-637, 1999.
  23. 임경아, 윤수한. Stainless Steel K-file, Profile .04와 Quantec LX를 이용한 만곡 근관 형성후의 근관형태의 변화에 관한 비교연구. 대한치과보존학회지 25:133-140, 2000.
  24. 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. https://doi.org/10.1111/j.1365-2591.1997.tb01092.x
  25. 이석종, 신영근, 황호길. 만곡근관의 확대시 기구에 따른 형태변화에 관한 연구. 대한치과보존학회지 24:503-510, 1999.

Cited by

  1. in simulated canals with different curvatures vol.32, pp.2, 2007, https://doi.org/10.5395/JKACD.2007.32.2.087