Abstract
Introduction
In cases of failed root canal treatment, endodontic retreatment of the root canal
system is necessary. The present study aimed to assess variation in the incidence
and depth of residual filling material in dentinal tubules after gutta-percha removal
with H-files, the ProTaper Universal System (Dentsply Maillefer, Ballaigues, Switzerland),
and the SybronEndo K3 System (SybronEndo Corporation, Orange, CA).
Methods
Forty human mandibular premolars with single straight root canals were prepared with
K-files (up to size 40) using the step-back technique and filled by cold lateral condensation
with gutta-percha and AH Plus sealers (Dentsply DeTrey, Konstanz, Germany). After
1 year, the 40 teeth were divided into one control group and 3 retreatment groups
(n = 10 each). Gutta-percha was removed using H-files, the ProTaper Universal System,
or the SybronEndo K3 System. The teeth were sectioned, and the incidence and depth
of residual filling material in the dentinal tubules were measured under scanning
electron microscopy.
Results
The depth of filling material in the dentinal tubules did not differ significantly
among groups (P > .05). Residual filling material was present in significantly more dentinal tubules
in the ProTaper (P = .043) and K3 groups (P = .001) than in the H-file and control groups.
Conclusions
The ProTaper Universal System and the SybronEndo K3 System left filling material in
a greater proportion of dentinal tubules than did H-files.
Key Words
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Article info
Publication history
Published online: January 24, 2012
Footnotes
This work was supported by funds 2011SZ0031.
Identification
Copyright
© 2012 Published by Elsevier Inc. All rights reserved.
