The influence of preparation size on the mechanical efficacy of root canal irrigation in vitro

Kenneth W. Falk, Christine M. Sedgley

Research output: Contribution to journalArticle

71 Scopus citations

Abstract

This study tested the hypothesis that the mechanical efficacy of irrigation in reducing intracanal bacteria is dependent on canal preparation size. Root canals of 30 extracted permanent cuspids were prepared consecutively to sizes 36, 60, and 77 at working length (WL) using ProFile 0.04 taper Series-29 files. Smear layer was removed and teeth autoclaved following completion of each instrumentation sequence. Root canals were inoculated with a 15-μl suspension (1 × 106 cells) of Pseudomonas fluorescens 5RL, a salicylate-inducible bioluminescent reporter strain. Bioluminescence was measured before inoculation (background), after inoculation and after irrigation with 6 ml of irrigant delivered 1 mm from WL using a 28G safety-ended needle. The percentage of bacteria remaining following irrigation was 26.95 ± 9.71%, 10.46 ± 5.87%, and 10.64 ± 6.01% for sizes 36, 60, and 77, respectively (p < 0.001; repeated-measures ANOVA), with no difference between sizes 60 and 77 (p > 0.05; Tukeys). Irrigation 1 mm from WL was significantly less effective in canals prepared to size 36.

Original languageEnglish (US)
Pages (from-to)742-745
Number of pages4
JournalJournal of endodontics
Volume31
Issue number10
DOIs
StatePublished - Oct 2005

Keywords

  • Bacteria
  • Bioluminescence
  • Endodontic
  • Irrigation
  • Preparation size

ASJC Scopus subject areas

  • Dentistry(all)

Fingerprint Dive into the research topics of 'The influence of preparation size on the mechanical efficacy of root canal irrigation in vitro'. Together they form a unique fingerprint.

  • Cite this