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    Effect of EDTA and QMIX Ultrasonic Activation on the Reduction of Microorganisms and Endotoxins in Ex Vivo Human Root Canals

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    Author
    Matos, F.S.
    Khoury, R.D.
    Carvalho, C.A.T.
    Date
    2019
    Journal
    Brazilian dental journal
    Publisher
    SciELO
    Type
    Article
    
    Metadata
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    See at
    https://doi.org/10.1590/0103-6440201902470
    Abstract
    The present study aimed to compare the effectiveness of QMiX and 17% EDTA associated to passive ultrasonic irrigation (PUI) or manual agitation (MA) on the reduction of E. faecalis, E. coli and LPS from root canals. Forty single rooted human teeth were randomly divided into four groups (n=10), according to the final irrigation protocol: EDTA+MA, QMiX+MA, EDTA+PUI, QMiX+PUI. Sample collections were obtained from the root canal content immediately before preparation (baseline-S1), after instrumentation (S2), after final irrigation protocol (S3) and 7 days after instrumentation and final irrigation (S4). The antimicrobial effectivity and on endotoxin content were analyzed by culture procedure (CFU/mL) and LAL assay (EU/mL), respectively. The results were statistically analyzed by Kruskal-Wallis and Friedman test (α=5%). QMiX+MA and QMiX+PUI reduced 100% of E. coli and E. faecalis bacteria and also prevented E. faecalisregrowth at S4. EDTA significantly reduced E. coli, but it was not effective in reducing E. faecalis. All protocols reduced EU/mL when compared to S1, however at S4 there was a significant reduction of EU/mL only in the QMiX+MA and QMiX+PUI groups in relation to S3 and S2, respectively. Final irrigation with QMiX associated with MA or PUI had superior antibacterial efficacy compared to EDTA, eliminating 100% of E. coli and E. faecalis strains. In addition, QMiX+PUI reduced 97.61% of the initial content of LPS.
    Keyword
    endotoxin
    passive ultrasonic irrigation
    QMix root canal irrigant
    Bacteria
    Identifier to cite or link to this item
    https://www.scopus.com/inward/record.uri?eid=2-s2.0-85067513563&doi=10.1590%2f0103-6440201902470&partnerID=40&md5=8a50a4354289f7e0a617e15779f5b101; http://hdl.handle.net/10713/10612
    ae974a485f413a2113503eed53cd6c53
    10.1590/0103-6440201902470
    Scopus Count
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    UMB Open Access Articles 2019

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