Effect of final irrigation protocols on microhardness reduction and erosion of root canal dentin

Abstract This study aimed to evaluate the effect of final irrigation protocols on microhardness reduction and erosion of root canal dentin. Sixty root canals from mandibular incisors were instrumented and randomly divided into six groups (n = 10) according to the irrigant used: QMiX, 17% EDTA, 10% c...

Full description

Bibliographic Details
Main Authors: Flávia Emi Razera BALDASSO, Luana ROLETO, Vinicius Duval da SILVA, Renata Dornelles MORGENTAL, Patrícia Maria Poli KOPPER
Format: Article
Language:English
Published: Sociedade Brasileira de Pesquisa Odontológica 2017-05-01
Series:Brazilian Oral Research
Subjects:
Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242017000100237&lng=en&tlng=en
id doaj-42905d534bc84ee382347dc9b4a0650c
record_format Article
spelling doaj-42905d534bc84ee382347dc9b4a0650c2020-11-24T22:35:19ZengSociedade Brasileira de Pesquisa Odontológica Brazilian Oral Research1807-31072017-05-0131010.1590/1807-3107bor-2017.vol31.0040S1806-83242017000100237Effect of final irrigation protocols on microhardness reduction and erosion of root canal dentinFlávia Emi Razera BALDASSOLuana ROLETOVinicius Duval da SILVARenata Dornelles MORGENTALPatrícia Maria Poli KOPPERAbstract This study aimed to evaluate the effect of final irrigation protocols on microhardness reduction and erosion of root canal dentin. Sixty root canals from mandibular incisors were instrumented and randomly divided into six groups (n = 10) according to the irrigant used: QMiX, 17% EDTA, 10% citric acid (CA), 1% peracetic acid (PA), 2.5% NaOCl (solution control), and distilled water (negative control). The chelating solutions were used to irrigate the canal followed by 2.5% NaOCl as a final flush. After the irrigation protocols, all specimens were rinsed with 10 mL of distilled water to remove any residue of the chemical solutions. Before and after the final irrigation protocols, dentin microhardness was measured with a Knoop indenter. Three indentations were made at 100 µm and 500 µm from the root canal lumen. Afterwards, the specimens were prepared for scanning electron microscopic analysis and the amount of dentin erosion was examined. Wilcoxon and Kruskal-Wallis tests were used to analyze the results with a significance level set at 5%. At 100 µm, all protocols significantly reduced dentin microhardness (p < .05), while at 500 µm, this effect was detected only in the EDTA and QMiX groups (p < .05). CA was the irrigant that caused more extensive erosion in dentinal tubules, followed by PA and EDTA. QMiX opened dentinal tubules, but did not cause dentin erosion. Results suggest that QMiX and 17% EDTA reduced dentin microhardness at a greater depth. Additionally, QMiX did not cause dentin erosion.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242017000100237&lng=en&tlng=enEndodonticsRoot Canal IrrigantsHardnessErosion
collection DOAJ
language English
format Article
sources DOAJ
author Flávia Emi Razera BALDASSO
Luana ROLETO
Vinicius Duval da SILVA
Renata Dornelles MORGENTAL
Patrícia Maria Poli KOPPER
spellingShingle Flávia Emi Razera BALDASSO
Luana ROLETO
Vinicius Duval da SILVA
Renata Dornelles MORGENTAL
Patrícia Maria Poli KOPPER
Effect of final irrigation protocols on microhardness reduction and erosion of root canal dentin
Brazilian Oral Research
Endodontics
Root Canal Irrigants
Hardness
Erosion
author_facet Flávia Emi Razera BALDASSO
Luana ROLETO
Vinicius Duval da SILVA
Renata Dornelles MORGENTAL
Patrícia Maria Poli KOPPER
author_sort Flávia Emi Razera BALDASSO
title Effect of final irrigation protocols on microhardness reduction and erosion of root canal dentin
title_short Effect of final irrigation protocols on microhardness reduction and erosion of root canal dentin
title_full Effect of final irrigation protocols on microhardness reduction and erosion of root canal dentin
title_fullStr Effect of final irrigation protocols on microhardness reduction and erosion of root canal dentin
title_full_unstemmed Effect of final irrigation protocols on microhardness reduction and erosion of root canal dentin
title_sort effect of final irrigation protocols on microhardness reduction and erosion of root canal dentin
publisher Sociedade Brasileira de Pesquisa Odontológica
series Brazilian Oral Research
issn 1807-3107
publishDate 2017-05-01
description Abstract This study aimed to evaluate the effect of final irrigation protocols on microhardness reduction and erosion of root canal dentin. Sixty root canals from mandibular incisors were instrumented and randomly divided into six groups (n = 10) according to the irrigant used: QMiX, 17% EDTA, 10% citric acid (CA), 1% peracetic acid (PA), 2.5% NaOCl (solution control), and distilled water (negative control). The chelating solutions were used to irrigate the canal followed by 2.5% NaOCl as a final flush. After the irrigation protocols, all specimens were rinsed with 10 mL of distilled water to remove any residue of the chemical solutions. Before and after the final irrigation protocols, dentin microhardness was measured with a Knoop indenter. Three indentations were made at 100 µm and 500 µm from the root canal lumen. Afterwards, the specimens were prepared for scanning electron microscopic analysis and the amount of dentin erosion was examined. Wilcoxon and Kruskal-Wallis tests were used to analyze the results with a significance level set at 5%. At 100 µm, all protocols significantly reduced dentin microhardness (p < .05), while at 500 µm, this effect was detected only in the EDTA and QMiX groups (p < .05). CA was the irrigant that caused more extensive erosion in dentinal tubules, followed by PA and EDTA. QMiX opened dentinal tubules, but did not cause dentin erosion. Results suggest that QMiX and 17% EDTA reduced dentin microhardness at a greater depth. Additionally, QMiX did not cause dentin erosion.
topic Endodontics
Root Canal Irrigants
Hardness
Erosion
url http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242017000100237&lng=en&tlng=en
work_keys_str_mv AT flaviaemirazerabaldasso effectoffinalirrigationprotocolsonmicrohardnessreductionanderosionofrootcanaldentin
AT luanaroleto effectoffinalirrigationprotocolsonmicrohardnessreductionanderosionofrootcanaldentin
AT viniciusduvaldasilva effectoffinalirrigationprotocolsonmicrohardnessreductionanderosionofrootcanaldentin
AT renatadornellesmorgental effectoffinalirrigationprotocolsonmicrohardnessreductionanderosionofrootcanaldentin
AT patriciamariapolikopper effectoffinalirrigationprotocolsonmicrohardnessreductionanderosionofrootcanaldentin
_version_ 1725723907313369088