Shaping Ability of Four Nickel-Titanium Rotary Instruments in Simulated S-Shaped Canals

Antonio Bonaccorso, Giuseppe Cantatore, Guglielmo Guido Condorelli, Edgar Schäfer, Teresa Roberta Tripi

Research output: Contribution to journalArticlepeer-review


Introduction: The purpose of this study was to compare the shaping ability of ProTaper, Mtwo, BioRaCe, and BioRaCe + S-Apex instruments in simulated canals with an S-shaped curvature. Methods: Canal transportation and aberrations were assessed by comparing the preinstrumentation and postinstrumentation images under a stereomicroscope. Analysis of variance and post hoc Student-Newman-Keuls test were used for statistical analysis. Results: ProTaper instruments caused more pronounced canal transportation in the apical curvature (P <.01) than all other instruments. The use of ProTaper, Mtwo, and BioRaCe instruments resulted in more canal aberrations compared with BioRaCe + S-Apex (P <.05). Conclusions: NiTi systems including less tapered and more flexible instruments like S-Apex seem to be favorable when preparing S-shaped canals.

Original languageEnglish
Pages (from-to)883-886
Number of pages4
JournalJournal of Endodontics
Issue number6
Publication statusPublished - Jun 2009


  • Apical curvature
  • canal transportation
  • mechanical preflaring

ASJC Scopus subject areas

  • Dentistry(all)


Dive into the research topics of 'Shaping Ability of Four Nickel-Titanium Rotary Instruments in Simulated S-Shaped Canals'. Together they form a unique fingerprint.

Cite this