E-ISSN 2548-0839
*
Influence of Root Canal Curvature on Wall Cleanliness in the Apical Third during Canal Preparation
1 Department of Restorative Dentistry and Endodontics University of Lille Faculty of Odontology, Lille, France; Department of Material Chemistry University of Valenciennes, Famars, France  
2 Department of Prosthodontics University of Lille, Lille, France.  
3 Department of Restorative Dentistry and Endodontics University of Lille Faculty of Odontology, Lille, France.  
4 Department of Bioistatistics University of Lille, Lille France.  
5 Department of Material Chemistry University of Valenciennes, Famars, France.  
6 Department of Restorative Dentistry and Endodontics University of Lille Faculty of Odontology, Lille, France.  
Eur Endod J 2017; 2: 19-19
DOI: 10.5152/eej.2017.16035
This article was viewed 241 times, downloaded 241 times

Key Words: Debris, reciprocating motion, root canal preparation, rotary nickel-titanium instruments, smear layer
Abstract

Objective: The aim of this study was to evaluate the influence of root canal curvature (curved and straight root canals), prepared using reciprocating and rotary files, on wall cleanliness during root canal treatments.

 

Methods: Thirty curved and 30 straight human root canals were prepared using ProTaper (Dentsply), ProTaper Next (Dentsply) and Reciproc files (Dentsply) (n=20/group). The roots were split longitudinally and observed using a scanning electron microscope. Six micrographs were obtained at 1, 3 and 5 mm from the working length (WL). Two blinded observers scored the amount of debris. Mean debris scores were compared using a non-parametric the Mann-Whitney U test or Kruskal-Wallis test, and a Bonferroni correction was used for multiple comparisons.

 

Results: Considering all the shaping systems together, the debris scores were lower in curved root canals (P<0.05). Reciproc and ProTaper Next performed better than ProTaper in straight canals (P<0.05). No difference was found between ProTaper Next and Reciproc regardless of the canal curvature or distance from the WL. Considering all the shaping systems together, cleanliness increased when pulling away from the WL.

 

Conclusion: The anatomical configuration of the root canal influences the quality of cleaning by shaping instruments regardless of the instrument kinematics during endodontic procedures. In every circumstance, the last millimetres of the apical third remain the most difficult area to clean.

Key Words
Authors
All
Author's Corner
Survey
AVES | Copyright © 2017 European Endodontic Journal | Latest Update: 01.06.2017