QMix® irrigant reduces lipopolysacharide (LPS) levels in an in vitro model
J. appl. oral sci
; 23(4): 431-435, July-Aug. 2015. tab, ilus
Article
de En
| LILACS, BBO
| ID: lil-759357
Bibliothèque responsable:
BR1.1
ABSTRACT
AbstractThe presence of endotoxin inside the root canal has been associated with periapical inflammation, bone resorption and symptomatic conditions.Objectives To determine, in vitro, the effect of QMix® and other three root canal irrigants in reducing the endotoxin content in root canals.Material and Methods Root canals of single-rooted teeth were prepared. Samples were detoxified with Co-60 irradiation and inoculated with E. coli LPS (24 h, at 37°C). After that period, samples were divided into 4 groups, according to the irrigation solution tested QMix®, 17% EDTA, 2% chlorhexidine solution (CHX), and 3% sodium hypochlorite (NaOCl). LPS quantification was determined by Limulus Amebocyte Lysate (LAL) assay. The initial counting of endotoxins for all samples, and the determination of LPS levels in non-contaminated teeth and in contaminated teeth exposed only to non-pyrogenic water, were used as controls.Results QMix® reduced LPS levels, with a median value of 1.11 endotoxins units (EU)/mL (p<0.001). NaOCl (25.50 EU/mL), chlorhexidine (44.10 EU/mL) and positive control group (26.80 EU/mL) samples had similar results. Higher levels were found with EDTA (176.00 EU/mL) when compared to positive control (p<0.001). There was no significant difference among EDTA, NaOCl and CHX groups. Negative control group (0.005 EU/mL) had statistically significant lower levels of endotoxins when compared to all test groups (p<0.001).Conclusion QMix® decreased LPS levels when compared to the other groups (p<0.001). 3% NaOCl, 2% CHX and 17% EDTA were not able to significantly reduce the root canal endotoxins load.
Mots clés
Texte intégral:
1
Indice:
LILACS
Sujet Principal:
Polymères
/
Liquides d'irrigation endocanalaire
/
Biguanides
/
Lipopolysaccharides
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Endotoxines
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Escherichia coli
Type d'étude:
Evaluation_studies
/
Prognostic_studies
Limites du sujet:
Humans
langue:
En
Texte intégral:
J. appl. oral sci
Thème du journal:
ODONTOLOGIA
Année:
2015
Type:
Article