A comparison between two current irrigation concepts for smear layer removal efficacy at the apical third of root canal system
Date
2012
DOI
Authors
Al-Harbi, Nouf Ali Salem
Version
OA Version
Citation
Abstract
INTRODUCTION: Multiple studies have suggested that bacteria and debris remain in the apical area within the root canal system even after meticulous chemo-mechanical debridement. However, some studies have suggested that agitation of the irrigation can increase efficacy of debris and smear layer removal in all areas of the canal system.
PURPOSE: To compare between negative-pressure irrigation technique at two different exposure times to the passive ultrasonic irrigation technique for smear layer removal efficacy at the apical third of root canal system using EndoVac[R] (Discus Dental[R], Culver City, CA) versus ProUltra[R] PiezoFlow[TM] ultasonic irrigation needle (DENTSPLY Tulsa).
METHODS AND MATERIALS: A total of eighty extracted human teeth or roots with fully developed apices with single canal will be assigned in this in vitro study. Canal was instrumented to a master apical file size#40/.04 taper. The samples was assigned into 2 main groups according to the final agitation of irrigation technique and then each main group was randomly divided into 2 different test subgroups with five teeth in each group according to the irrigation protocols. Two control groups of 2 teeth in each was included to confirm that the basic conditions of the experiment were able to produce a negative or positive result. Subsequently, the roots were split longitudinally in a buccolingual direction, resulting in 5 samples per subgroup. Each specimen was mounted on stubs, gold-sputtered, and was examined under scanning electron microscope the amount of remaining debris and smear layer at the apical region of each specimen was scored by three blinded expert observers with a 5-score system.
RESULTS: For the apical aspect, there were significant differences in smear layer for the testing groups and the controls with significantly lower scores for EndoVac[R] and PiezoFlow[TM] among groups when one additional minute of EDTA was used.
There was not a significant difference in debris scores among groups and none of the pairwise differences were significant. For the apical location of canal there was not a significant difference in debris scores among groups (p=0.8619), and none of the pairwise differences were significant.
CONCLUSION: Additional application of activated 17% EDTA for 1 min was actively working upon the smear layer, which it partially removed, remaining only in some obliterated dentinal tubules.
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Thesis (MSD) --Boston University Institute for Dental Research and Education, Dubai, 2012 (Endodontics).
Includes bibliographic references: leaves 71-87.
Thesis (MSD) --Boston University Institute for Dental Research and Education, Dubai, 2012 (Endodontics).
Includes bibliographic references: leaves 71-87.
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This work is protected by copyright. Downloading is restricted to the BU community. If you are the author of this work and would like to make it publicly available, please contact open-help@bu.edu.