Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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THE EFFECT OF DIFFERENT FLUTE DESIGN AND TORQUE-CONTROLLED MOTOR ON THE SHAPING ABILITY OF SIMULATED RESIN ROOT CANALS

엔진의 토크 조절 능력과 니켈-티타늄 파일의 삭제 성향이 근관 성형에 미치는 영향

  • Roh, Hyoung-Mee (Department of Conservative Dentistry, School of Dentistry, Pusan National University) ;
  • Huh, Bock (Department of Conservative Dentistry, School of Dentistry, Pusan National University) ;
  • Kim, Hyeon-Cheol (Department of Conservative Dentistry, School of Dentristry, Pusan National University) ;
  • Park, Jeong-Kil (Department of Conservative Dentistry, School of Dentristry, Pusan National University)
  • 노형미 (부산대학교 치과대학 치과보존학교실) ;
  • 허복 (부산대학교 치과대학 치과보존학교실) ;
  • 김현철 (부산대학교 치과대학 치과보존학교실) ;
  • 박정길 (부산대학교 치과대학 치과보존학교실)
  • Published : 2005.11.01
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Abstract

The purpose of this study was to compare the shaping ability of the two different Ni-Ti file systems and the two different engine systems in simulated canals. A total of four groups of each 10 were tested. Each group was instrumented with HeroShaper and Endo-Mate2 (Croup HE), HeroShaper and Tecnika (Croup HT), ProFile and Endo-Mate2 (Group PE), and ProFile and Tecnika (Croup PT). Canal preparation time was recorded. The images of pre- and post- instrumented root canals were scanned and superimposed. The amounts of increased width and centering ratio were measured and calculated at apical 1, 3 and 5mm levels. These data were statistically analyzed with one-way ANOVA and Duncan's multiple range test The results of this study were as fellows ; 1. Canal preparation time of HT group was the shortest (p<0.05). 2. The amount of increased canal width in HE group was significantly larger than PT group at apical 1mm level (p<0.05) At apical 3mm level, PT group was significantly smaller than other groups (p<0.05). At apical 5mm level, PE group was significantly larger than PT group (p<0.05). 3. The amount of centering ratio in HE group was significantly larger than other groups (p<0.05). At apical 5mm level, HT group was significantly larger than PE group and PT group (p<0.05). Under the condition of this study, torque-controlled endodontic motor is safer than no torque controlled motor, especially when the active file is used.

이 연구의 목적은 니켈-니타늄 파일의 삭제 성향과 엔진의 토크 조절 능력이 근관 성형에 미치는 영향을 평가하는 것이다 레진 모형 40개를 사용하였으며, Hero Shaper(R)와 Endo-Mate2을 이용한 HE군, Hero Shaper(R)와 Tecnika(R)를 이용한 HT군, Profile(R)과 Endo-Mate2(R)를 이용한 PE군, Profile(R)과 Tecnika(R)를 이용한 PT군으로 구분하여 근관성형 하였다. 각 군별 근관 성형 시간을 기록하였다. 근단공으로부터의 수직 이동 거리 1, 3 그리고 5mm 위치에서의 근관 삭제량, 중심이 동률을 산출하여 다음의 결론을 얻었다. 1. 근관 성형 시간은 HT군이 가장 빨랐다 (p<0.05). 2. 삭제량은 1mm지점에서 HE군이 PT군보다 컸고 (p<0.05), 3mm지점에서는 PT군이 다른 군들보다 작았다 (p<0.05). 5mm에서는 PE군이 PT군보다 컸다 (p<0.05). 3. 중심 이동률은 1mm 지점에서 HE군이 다른 군들보다 컸으며 (p<0.05), 5mm에서는 HT군이 PE군과 PT군보다 컸다 (p<0.05). 따라서 토크 조절이 되는 엔진을 사용하는 것이 근관의 변위를 적게 유발하고 과도한 삭제 량을 예방 할 수 있으며 근관 성형시간도 단축 할 수 있는 것으로 보이며 따라서 양호한 근관 성형 결과에 영향을 준다고 볼 수 있다.

Keywords

References

  1. Gambarini G. Rationale for the use of low torque endodontic motors in root canal instrumentation. Endod Dent Traumatol 16:95-100, 2000 https://doi.org/10.1034/j.1600-9657.2000.016003095.x
  2. Morgan LF, Montgomery S. An evaluation of the crown- down pressureless technique. J Endod 10:491-498, 1984 https://doi.org/10.1016/S0099-2399(84)80207-1
  3. 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
  4. Sattapan B, Nervo GJ, Palamara JE, Messer HH. Defects in rotary nickel-titanium files after clinical use. J Endod 26:161-165, 2000 https://doi.org/10.1097/00004770-200003000-00008
  5. Calvin B, Suffridge, Gary R, Hartwell, MS, and Thomas L, Walker. Cleaning efficiency of Nickel-Titanium GT and 04 Rotary Files when used in a torque-controlled rotary handpiece. J Endod 29:346-348, 2003 https://doi.org/10.1097/00004770-200305000-00007
  6. Haikel Y, Gasser P, Allemann C. Dynamic fracture of hybrid endodontic hand instruments compared with traditional files. J Endod 17:217-220, 1991 https://doi.org/10.1016/S0099-2399(06)81924-2
  7. Widey WL, Senia ES, Montgomery S. Another look at root canal instrumentation. Oral Surg Oral Med Oral Pathol 74:499-507, 1992 https://doi.org/10.1016/0030-4220(92)90303-8
  8. Bahcall JK, Barss JT. Understanding and evaluating the endodontic file. Gen Dent 48:690-692, 2000
  9. Averbach RE, Kleier DJ, Kleier DJ. Endodontics in the 21st century: the rotary revolution. Compend Contin Educ Dent 22:27-34, 2001
  10. Camps JJ, Pertot WJ. Torsional and stiffness properties of nickel- titanium K files. Int Endod J 74:499-507, 1995
  11. Schneider SW. A comparison of canal preperations in straight and curved root canals. Oral Surg Oral Med Oral Pathol 32:271-275, 1971 https://doi.org/10.1016/0030-4220(71)90230-1
  12. William GK, David LC, David JC, William AW III. Effect of tip design of nickel-titanium and stainless steel files on root canal preperation. J Endod 23:735-738, 1997 https://doi.org/10.1016/S0099-2399(97)80345-7
  13. 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
  14. Kosa DA, Marshall G, Baumgartner JC. An analysis of canal centering using mechanical instrumentation techniques. J Endod 25:441-445, 1999 https://doi.org/10.1016/S0099-2399(99)80275-1
  15. Buchanan LS. The standardized-taper root canal preperation-Part 1. Concepts for variably tapered shaping instruments. Int Endod J 33:516-529, 2000 https://doi.org/10.1046/j.1365-2591.2000.00384.x
  16. 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
  17. Blum JY, Machtou P, Micallef JP. Location of contact areas on rotary Profile instruments in relationship to the forces developed during mechanical preperation on extracted teeth. Int Endod J 32:108-114, 1999 https://doi.org/10.1046/j.1365-2591.1999.00200.x
  18. Yared G, Kulkarni GK. Accuracy of the DTC torque control motor for nickel-titanium rotary instruments. Int Endod J 37:399-402, 2004 https://doi.org/10.1111/j.1365-2591.2004.00824.x
  19. Glosson CR, Haller RH, Dove SB and del Rio CE. A comparision of root canal preperation using Ni-Ti hand, Ni-Ti engine-driven, and K-Flex endodontic instruments. J Endod 21:146-151, 1995 https://doi.org/10.1016/S0099-2399(06)80441-3