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VOLUME 14 , ISSUE 1 ( January-February, 2013 ) > List of Articles

RESEARCH ARTICLE

Comparison of Air-driven vs Electric Torque Control Motors on Canal Centering Ability by ProTaper NiTi Rotary Instruments

Mina Zarei, Maryam Javidi, Mahdi Erfanian, Mahdi Lomee, Farzaneh Afkhami

Citation Information : Zarei M, Javidi M, Erfanian M, Lomee M, Afkhami F. Comparison of Air-driven vs Electric Torque Control Motors on Canal Centering Ability by ProTaper NiTi Rotary Instruments. J Contemp Dent Pract 2013; 14 (1):71-75.

DOI: 10.5005/jp-journals-10024-1273

Published Online: 01-06-2013

Copyright Statement:  Copyright © 2013; The Author(s).


Abstract

Aim

Cleaning and shaping is one of the most important phases in root canal therapy. Various rotary NiTi systems minimize accidents and facilitate the shaping process. Todays NiTi files are used with air-driven and electric handpieces. This study compared the canal centering after instrumentation using the ProTaper system using Endo IT, electric torque-control motor, and NSK air-driven handpiece.

Materials and methods

This ex vivo randomized controlled trial study involved 26 mesial mandibular root canals with 10 to 35° curvature. The roots were randomly divided into 2 groups of 13 canals each. The roots were mounted in an endodontic cube with acrylic resin, sectioned horizontally at 2, 6 and 10 mm from the apex and then reassembled. The canals were instrumented according to the manufacturer's instructions using ProTaper rotary files and electric torque-control motors (group 1) or air-driven handpieces (group 2). Photographs of the cross-sections included shots before and after instrumentation, and image analysis was performed using Photoshop software. The centering ability and canal transportation was also evaluated. Repeated measurement and independent t-test provided statistical analysis of canal transportation.

Results

The comparison of the rate of transportation toward internal or external walls between the two groups was not statistically significant (p = 0.62). Comparison of the rate of transportation of sections within one group was not significant (p = 0.28).

Conclusion

Use of rotary NiTi file with either electric torquecontrol motor or air-driven handpiece had no effect on canal centering.

Clinical significance

NiTi rotary instruments can be used with air-driven motors without any considerable changes in root canal anatomy, however it needs the clinician to be expert.

How to cite this article

Zarei M, Javidi M, Erfanian M, Lomee M, Afkhami F. Comparison of Air-driven vs Electric Torque Control Motors on Canal Centering Ability by ProTaper NiTi Rotary Instruments. J Contemp Dent Pract 2013;14(1):71-75.


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  1. Cleaning and shaping the root canal. Dent Clin North Am 1974;18:269.
  2. In vitro comparison of shaping abilities of ProTaper and GT rotary files. J Endod 2004;30:163-66.
  3. Effect of preparation with endodontic handpieces on original canal shape. J Endod 1976;2:298-303.
  4. Shaping ability of ProTaper nickel-titanium files in simulated resin root canals. Int Endod J 2004;37:613-23.
  5. The shaping effect of the combination of two rotary nickel-titanium instruments in simulated S-shaped canals. J Endod 2008;34:456-58.
  6. A comparison of canal preparation with nickel-titanium and stainless steel instrument. J Endod 1995;21:173-76.
  7. A comparison of root canal preparations using NiTi hand, NiTi engine-driven, and K-Flex endodontic instruments. J Endod 1995;21:146-51.
  8. Three-dimensional analysis of cutting behavior of nickel-titanium rotary instruments by microcomputed tomography. J Endod 2008;34:606-10.
  9. A comparison of three nickel-titanium rotary systems, EndoSequence, ProTaper universal, and profile GT, for canal-cleaning ability. J Endod 200935107-09.
  10. Shaping ability of four nickel-titanium rotary instruments in simulated S-shaped canals. J Endod 2009;35:883-86.
  11. Influence of different types of automated devices on the shaping ability of rotary nickeltitanium FlexMaster instruments Int Endod J 2005;38:627-36.
  12. Defects in GT rotary instruments after use: An SEM study. J Endod 2001;27:782-85.
  13. Advantages and disadvantages of new torquecontrolled endodontic motors and low-torque NiTi rotary instrumentation. Aust Endod J 2001;27:99-104.
  14. Cyclic fatigue of nickel-titanium rotary instruments after clinical use with low-and high-torque endodontic motors. J Endod 2001;27:772-74.
  15. Influence of manual preflaring and torque on the failure rate of ProTaper rotary instruments. J Endod 2004;30:228-30.
  16. The effect of three rotational speed settings on torque and apical force with vortex rotary instruments in vitro. J Endod 2011;37:860-64.
  17. A comparison of canal preparation in straight and curved root canals. Oral Surg Oral Med Oral Pathol 1971;32:271-75.
  18. A comparison of the effects on canal transportation by four instrumentation techniques. J Endod 1997;23:503-07.
  19. The use of computed tomography when comparing nickel-titanium and stainless steel files during preparation of simulated curved canals. Int Endod J 2001;34:452-57.
  20. Comparison of canal transportation and centering ability of twisted files, Pathfile-ProTaper System, and stainless steel hand K-files by using computed tomography. J Endod 2010;36:904-07.
  21. Centering ability and dentin removal of rotary systems in curved root canals Iranian Endod J 2009;4:91-95.
  22. Effect of noncutting tipped instruments on the quality of root canal preparation using a modified double-flared technique. J Endod 1992;18:32-36.
  23. Comparison of three instrumentation techniques in the preparation of simulated curved root canals. Int Endod J 1996;29:315-19.
  24. An initial investigation of the bending and torsional properties of Nitinol root canal files. J Endod 1988;14:346-51.
  25. Shaping ability of ProFile.04 Taper Series 29 rotary nickel-titanium instruments in simulated root canals. Part 1. Int Endod J 1997;30:1-7.
  26. Influence of torque control motors and the operator's proficiency on ProTaper failures. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2003;96: 229-33.
  27. Comparison of nickeltitanium file distortion using electric and air-driven handpieces. J Endod 2001;27:57-59.
  28. Cyclic fatigue of endodontic nickel-titanium rotary instruments: Static and dynamic tests. J Endod 2002;28:448-51.
  29. The influence of torque and manual glide path on the defect or separation rate of NiTi rotary instruments in root canal therapy. Indian J Dent Res 2010;21:107-11.
  30. The influence of a manual glide path on the separation rate of NiTi rotary instruments. J Endod 2005;31:114-16.
  31. Roentgenographic investigation of frequency and degree of canal curvatures in human permanent teeth. J Endod 2002;28:211-16.
  32. Comparison of root canal preparation using different automated devices and hand instrumentation. J Endod 1993;19:141-45.
  33. Cleaning efficiency of nickel-titanium GT and .04 rotary files when used in a torquecontrolled rotary hand piece. J Endod 2003;29:346-48.
  34. ProTaper rotary root canal preparation: Assessment of torque and force in relation to canal anatomy. Int Endod J 2003;36:93-99.
  35. The influence of various automated devices on the shaping ability of two rotary nickel-titanium instruments. Int Endod J 2006;39:945-51.
  36. Comparison on the shaping ability of three different instruments in preparing curved molar canals. Hua Xi Kou Qiang Yi Xue Za Zhi 2005;23:393-96.
  37. Shaping ability of RaCe rotary nickel-titanium instruments in simulated root canals. J Endod 2005;31:460-63.
  38. Assessment of shaping ability of ProTaper in curved canals. Hua Xi Kou Qiang YiXue Za Zhi 2007;25:1.
  39. Clinical evaluation of ProTaper NiTi rotary instruments in management of curved root canals. Zhonghua kou Qiang Yi Xue Za Zhi 2004;39:136-38.
  40. A comparison of the shaping abilities of 4 nickel-titanium rotaryinstruments in simulated root canals. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2003;95: 228-33.
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