Computed micro-tomographic evaluation of glide path with nickel-titanium rotary pathfile in maxillary first molars curved canals

Damiano Pasqualini, Caterina Chiara Bianchi, Davide Salvatore Paolino, Lucia Mancini, Andrea Cemenasco, Giuseppe Cantatore, Arnaldo Castellucci, Elio Berutti

Research output: Contribution to journalArticle


Introduction: X-ray computed micro-tomography scanning allows high-resolution 3-dimensional imaging of small objects. In this study, micro-CT scanning was used to compare the ability of manual and mechanical glide path to maintain the original root canal anatomy. Methods: Eight extracted upper first permanent molars were scanned at the TOMOLAB station at ELETTRA Synchrotron Light Laboratory in Trieste, Italy, with a microfocus cone-beam geometry system. A total of 2,400 projections on 360° have been acquired at 100 kV and 80 μA, with a focal spot size of 8 μm. Buccal root canals of each specimen (n = 16) were randomly assigned to PathFile (P) or stainless-steel K-file (K) to perform glide path at the full working length. Specimens were then microscanned at the apical level (A) and at the point of the maximum curvature level (C) for post-treatment analyses. Curvatures of root canals were classified as moderate (≤35°) or severe (≥40°). The ratio of diameter ratios (RDRs) and the ratio of cross-sectional areas (RAs) were assessed. For each level of analysis (A and C), 2 balanced 2-way factorial analyses of variance (P

Original languageEnglish
Pages (from-to)389-393
Number of pages5
JournalJournal of Endodontics
Issue number3
Publication statusPublished - Mar 2012



  • Computed micro-tomography scanning
  • glide path
  • nickel-titanium
  • nickel-titanium rotary instrumentation
  • PathFile

ASJC Scopus subject areas

  • Dentistry(all)

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