Shaping ability of three nickel-titanium endodontic file systems in simulated s-shaped root canals

Jeffrey R. Burroughs, Brian E. Bergeron, Mark D. Roberts, Joseph L. Hagan, Van T. Himel

Research output: Contribution to journalArticle

19 Scopus citations


Introduction: The purpose of this study was to determine the shaping ability of 3 nickel-titanium (NiTi) endodontic file systems by measuring canal transportation. Methods: Seventy-two S-shaped canals in resin blocks were randomly allocated into 3 groups (n = 24): the Self-Adjusting File (SAF; ReDent Nova, Ra'anana, Israel) group, the Typhoon group (Typhoon rotary files with Controlled Memory Wire; DS Dental, Johnson City, TN), and the Vortex group (ProFile Vortex rotary files with M-Wire NiTi; Dentsply Tulsa Dental Specialties, Tulsa, OK). Blocks were secured in a jig for imaging standardization and instrumentation stabilization. Gates Glidden and PathFile drills (25 mm/.02 taper) were used to prepare the glide paths. For the Typhoon and Vortex groups (25 mm/.04 taper), canals were flooded with sterile water and instrumented using a crown-down technique from sizes 40 to 20/.04 and then apically enlarged to size 30/.04. The SAF group (25 mm) was instrumented with constant sterile water irrigation in a light-pecking, transline motion. Pre- and postinstrumentation images were taken at 40× magnification and layered, and canal transportation was measured. Results: After adjusting for the level and canal wall side, the mean transportation was significantly higher for the Typhoon (P < .001) and Vortex (P = .005) groups compared with the SAF group. Additionally, the mean transportation was significantly higher for the Typhoon group versus the Vortex group (P < .001). Conclusions: Under the conditions of this study, SAFs showed less canal transportation than ProFile Vortex and Typhoon files in simulated S-shaped root canals.

Original languageEnglish (US)
Pages (from-to)1618-1621
Number of pages4
JournalJournal of Endodontics
Issue number12
Publication statusPublished - Dec 1 2012
Externally publishedYes



  • NiTi
  • S-curvature
  • Self-Adjusting File
  • Typhoon
  • Vortex
  • canal transportation
  • controlled memory

ASJC Scopus subject areas

  • Dentistry(all)

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