Indian Journal of Dental ResearchIndian Journal of Dental ResearchIndian Journal of Dental Research
Indian Journal of Dental Research   Login   |  Users online:

Home Bookmark this page Print this page Email this page Small font sizeDefault font size Increase font size         


ORIGINAL RESEARCH Table of Contents   
Year : 2010  |  Volume : 21  |  Issue : 1  |  Page : 107-111
The influence of torque and manual glide path on the defect or separation rate of NiTi rotary instruments in root canal therapy

1 Department of Endodontics, Member of Dental Research Center, Dental School, Tehran, Iran
2 Department of Endodontics, Islamic Azad University, Dental School, Tehran, Iran
3 Department of Community Medicine, Mashhad University of Medical Sciences, Mashhad, Iran

Correspondence Address:
M Javidi
Department of Endodontics, Member of Dental Research Center, Dental School, Tehran
Login to access the Email id

Source of Support: The Vice Chancellor for Research of Mashhad University of Medical Sciences, Conflict of Interest: None

DOI: 10.4103/0970-9290.62815

Rights and Permissions

Introduction: One of the effecting factors in prognosis of root canal therapy is accidental procedure as broken files that may be unpreventable. Many manufacturers have designed and marketed various electromotors that can control rotational speed and torque. On the other hand, some studies have recommended applying a manual glide path to diminish contact area between the file and canal walls. The purpose of this study was evaluation of the effect of torque and a manual glide path on defects as separation of Nickel-titanium (NiTi) rotary files. Materials and Methods: This ex vivo randomized controlled trial study was carried out on 160 canals of human's matured molars with mild curvature (15-338). After initial preparation of samples and checking for inclusion criteria, in first group, preparation was carried out with air-driven handpiece, and in group two, Endo IT was used as electromotor. In both groups, Mtwo files with simultaneous technique were used for preparation. Then all data were collected and analyzed with Mann Whitny, Mantel Cox, and t-test. Results: No significant differences between two groups (P < 0.05) were observed. Based on survival analysis, safety probability of files after preparation of nine canals is 64% in group one and 69.9% in group two. There was no significant differences between this safety probability in two groups (P = 0.272). Conclusion: Usage of torque control handpiece is not an important factor, comparing instrumentation technique.

Print this article     Email this article

 Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
  Citation Manager
 Access Statistics
  Reader Comments
  Email Alert *
  Add to My List *

 Article Access Statistics
    PDF Downloaded296    
    Comments [Add]    
    Cited by others 8    

Recommend this journal