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만곡된 레진 모형 근관에서 4종의 엔진 구동형 니켈-티타늄 기구의 근관 중심율 유지 능력

The instrument-centering ability of four Nickel-Titanium instruments in simulated curved root canals

  • 구재훈 (원광대학교 치과대학 치과보존학교실) ;
  • 장훈상 (원광대학교 치과대학 치과보존학교실) ;
  • 장석우 (원광대학교 치과대학 치과보존학교실) ;
  • 조환희 (원광대학교 치과대학 치과보존학교실) ;
  • 배지명 (원광대학교 치과대학 치과재료학교실) ;
  • 민경산 (원광대학교 치과대학 치과보존학교실)
  • Ku, Jae-Hoon (Department of Conservative Dentistry, Wonkwang University) ;
  • Chang, Hoon-Sang (Department of Conservative Dentistry, Wonkwang University) ;
  • Chang, Seok-Woo (Department of Conservative Dentistry, Wonkwang University) ;
  • Cho, Hwan-Hee (Department of Conservative Dentistry, Wonkwang University) ;
  • Bae, Ji-Myung (Department of Dental Biomaterials College of Dentistry, Wonkwang University) ;
  • Min, Kyung-San (Department of Conservative Dentistry, Wonkwang University)
  • 발행 : 2006.03.01

초록

본 연구의 목적은 새로 시판된 NRT 기구의 근관 형태 유지 능력을 기존의 3종의 기구와 비교하는 것이다. 만곡된 레진 모형 근관을 ProFile, K3, ProTaper, NRT 기구를 이용하여 형성하였고 형성 전, 후의 상을 스캔한 후 중첩시켜 이미지 분석 프로그램을 이용하여 근관 만곡도의 변화와 근관 중심축에 대한 근관의 변이 정도를 근관 중심율의 변화로 계산하여 분석하였다. 근관 변이의 유의성 검정을 위해 one-way ANOVA분석을 시행하였으며 각 기구간의 유의성 검정은 Duncan's test로 사후 분석하였다. 근첨에서 1, 2 mm 상방 위치에서의 근관 중심율은 ProFile 군이 다른 군에 비해 우수한 것으로 나타났다. (p < 0.05). NRT기구의 근관 중심율 변화를 측정한 결과 근첨으로부터 5 mm 상방에서는 Profile에 비해서만 큰 것으로 나타났고 6, 7 mm 상방에서는 다른 모든 군들에 비해 큰 것으로 나타났다 (p < 0.05). 비록 NRT기구가 근첨 부위에서는 ProFile을 제외한 다른 기구에 비해 유의차 없는 중심률 유지 능력을 보였으나 근관 입구 및 중간부위의 형성에 사용되는 스테인레스-스틸 파일로 인해 coronal flaring시 다른 기구들에 비해 더 많은 중심률의 변화를 보이는 것으로 사료된다.

The aim of this study was to evaluate the ability of newly marketed NRT instruments to maintain the original root canal configuration and curvature during preparation in comparison with the three existing instruments in simulated root canals. Simulated canals in resin blocks were prepared with ProFile. K3, ProTaper and NRT instrument (n = 10 canals in each case). Pre- and post-operative images were recorded, and assessment of canal shape was completed with a computer image analysis program. The data were analyzed statistically using the One-way ANOVA followed by Duncan s test. The ability or instruments to remain centered in prepared canals at 1-, 2-mm levels was significantly better in ProFile groups than in other groups (p < 0.05). The change of centering ratio in NRT groups at 5-mm level was significantly greater than ProFile group and at 6- and 7-mm level than all other groups (p < 0.05). Although the NRT system was comparable to other systems in regards to its ability to maintain the canal configuration of apical portion, this system was more influenced by the mid-root curvature due to its stainless-steel files for coronal preflaring.

키워드

참고문헌

  1. AI-Omari MAO, Dummer PMH. Newcombe RG. Comparison of six files to prepare simulated root canals. Part 2. Int Endod J 25:67-81, 1992 https://doi.org/10.1111/j.1365-2591.1992.tb00739.x
  2. Schafer E, Tepel J. Hoppe W. Properties of endodontic hand instruments used in rotary motion. Part 2. Instrumentation of curved canals. J Endod 21 :493-497. 1995 https://doi.org/10.1016/S0099-2399(06)80519-4
  3. Wu MK, Wesselink PR. Efficacy of three techniques in cleaning the apical portion of curved canals. Oral Surg Oral Med Oral Pathol 79:492-496. 1995 https://doi.org/10.1016/S1079-2104(05)80134-9
  4. Zmener O. Banegas G. Comparison of three instrumentation techniques in the preparation of simulated root canals. Int Endod J 29:315-319. 1996 https://doi.org/10.1111/j.1365-2591.1996.tb01391.x
  5. Schneider SW. A comparison of canal preparations in straight and curved root canals. Oral surg 32: 271-275, 1971 https://doi.org/10.1016/0030-4220(71)90230-1
  6. Calhoun G, Montgomery S. The effects of four instrumentation techniques on root canal shape. J Endod 14:273-277. 1988 https://doi.org/10.1016/S0099-2399(88)80025-6
  7. Peters OA. Schonenberger K, Laib A. Effects of four Ni-Ti preparation techniques on root canal geometry assessed by micro computed tomography. Int Endod J 34:221-230, 2001 https://doi.org/10.1046/j.1365-2591.2001.00373.x
  8. Berutti E. Chiandussi G, Gaviglio I. Ibba A. Comparative analysis of torsional and bending stresses in two mathematical models of nickel-titanium rotary instruments: ProTaper versus ProFile. J Endod 29: 1519, 2003
  9. Yoshimine Y. Ono M. Akamine A. The shaping effects of three nickel-titanium rotary instruments in simulated S-shaped canals. J Endod 31:373-375, 2005 https://doi.org/10.1097/01.don.0000140568.40462.43
  10. Yun HH, 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 95: 228-233, 2003 https://doi.org/10.1067/moe.2003.92
  11. Guelzow A. Stamm O. Martus P, Kielbassa AM. Comparative study of six rotary nickel-titanium systems and hand instrumentation for root canal preparation. Int Endod J 743-752. 2005
  12. Iqbal MK, Firic S, Tulcan J. Karabucak B. Kim S. Comparison of apical transportation between ProFile and ProTaper NiTi rotary instruments. Int Endod J 37:359-364, 2004 https://doi.org/10.1111/j.1365-2591.2004.00792.x
  13. Weine FS. Kelly RF, Lio PJ. The effect of preparation procedures on original canal shape and on apical foramen shape. J Endod 1:255-262. 1975 https://doi.org/10.1016/S0099-2399(75)80037-9
  14. Davis RD, Marshall JG. Baumgartner JC. Effect of early coronal flaring on working length change in curved canals using rotary nickel-titanium versus stainless steel instruments. J Endod 28:438-442, 2002 https://doi.org/10.1097/00004770-200206000-00005
  15. Dummer PMH, Alodeh MHA. Al-Omari MAO. A method for the construction of simulated canals in clear resin blocks. Int Endod J 24:63-66. 1991 https://doi.org/10.1111/j.1365-2591.1991.tb00809.x

피인용 문헌

  1. Effect of cross-sectional area of 6 nickel-titanium rotary instruments on the fatigue fracture under cyclic flexural stress: A fractographic analysis vol.34, pp.5, 2009, https://doi.org/10.5395/JKACD.2009.34.5.424
  2. A comparison of the shaping ability of reciprocating NiTi instruments in simulated curved canals vol.37, pp.4, 2012, https://doi.org/10.5395/rde.2012.37.4.220