The Effect of Glide Path on Canal Centering Ability in Reciprocating File System

Reciprocating 파일 시스템에서 Glide Path가 근관만곡도 유지에 미치는 영향

  • Zang, Ki-Choul (Department of Conservative Dentistry, Gangneung-Wonju National University, School of Dentistry) ;
  • Kim, Jin-Woo (Department of Conservative Dentistry, Gangneung-Wonju National University, School of Dentistry) ;
  • Cho, Kyung-Mo (Department of Conservative Dentistry, Gangneung-Wonju National University, School of Dentistry) ;
  • Park, Se-Hee (Department of Conservative Dentistry, Gangneung-Wonju National University, School of Dentistry)
  • 장기철 (강릉원주대학교 치과대학 치의학과 치과보존학교실) ;
  • 김진우 (강릉원주대학교 치과대학 치의학과 치과보존학교실) ;
  • 조경모 (강릉원주대학교 치과대학 치의학과 치과보존학교실) ;
  • 박세희 (강릉원주대학교 치과대학 치의학과 치과보존학교실)
  • Received : 2012.07.12
  • Accepted : 2012.09.25
  • Published : 2012.09.30


The purpose of this study was to evaluate the influence of glide path on canal centering ratio after instrumentation with different single file systems; WaveOne and Reciproc. Reciproc R25 (VDW), WaveOne Primary (Dentsply Maillefer) and PathFile #13, 16, 19 (Dentsply Maillefer) were used in this study. In no glide path groups, Reciproc files and WaveOne files used for canal preparation without glide path. In glide path groups, the PathFile were used before canal preparation. Methylene blue dye was introduced into the canal to obtain a clear pre-instrumentation image. Pre-instrumentation images and post-instrumentation images were scanned using Epson Perfection V700 Photo scanner (Epson, Nagano, Japan). Transparencies of post-instrumentation images were changed and superimposed on pre-instrumentation images using Adobe Photoshop CS 3 (Adobe Systems Incorporated, San Jose, CA, USA). The centering ratio was calculated for each instrumented canal using the following formula: CR=|X1-X2|/Y. It was statistically analyzed using two-way ANOVA at 95% confidential level. The centering ratio in glide path groups were significant less than it in no glide path groups at 3, 4, 5 and 6 mm level. Except 1 and 6 mm level, WaveOne groups had significant less centering ration than Reciproc groups. At 6 mm level, there was no significant difference between WaveOne and Reciproc. In the limitation of this study, creation of a previous glide path before reciprocating motion instrumentation in curved canal appears to be appropriate and WaveOne system can be used for preparation of curved canal without severe aberrations.


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