Effect of canal length and curvature on working length alteration with WaveOne reciprocating files

Elio Berutti, Giorgio Chiandussi, Davide Salvatore Paolino, Nicola Scotti, Giuseppe Cantatore, Arnaldo Castellucci, Damiano Pasqualini

Research output: Contribution to journalArticlepeer-review


Introduction: This study evaluated the working length (WL) modification after instrumentation with WaveOne Primary (Dentsply Maillefer, Ballaigues, Switzerland) reciprocating files and the incidence of overinstrumentation in relation to the initial WL. Methods: Thirty-two root canals of permanent teeth were used. The angles of curvature of the canals were calculated on digital radiographs. The initial WL with K-files was transferred to the matched WaveOne Primary reciprocating files. After glide paths were established with PathFile (Dentsply Maillefer, Ballaigues, Switzerland), canals were shaped with WaveOne Primary referring to the initial WL. The difference between the postinstrumentation canal length and the initial canal length was analyzed by using a fiberoptic inspection microscope. Data were analyzed with a balanced 2-way factorial analysis of variance (P 1 = 30.65, P 2 = 4.38, P =.014). Conclusions: Checking the WL before preparation of the apical third of the root canal is recommended when using the new WaveOne NiTi single-file system.

Original languageEnglish
Pages (from-to)1687-1690
Number of pages4
JournalJournal of Endodontics
Issue number12
Publication statusPublished - Dec 2011


  • Nickel-titanium
  • reciprocating motion
  • WaveOne
  • working length

ASJC Scopus subject areas

  • Dentistry(all)


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