Effect of a new irrigant solution containing glycolic acid on smear layer removal and chemical/mechanical properties of dentin

The objective of this study was to evaluate the effects of glycolic acid (GA) (with pH 1.2 and 5) and ethylenediaminetetraacetic acid (EDTA) on the chemical and mechanical properties of dentin to investigate the potential use of GA as final irrigant in the root canal therapy. Specifically, changes i...

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Bibliographic Details
Published in:Scientific reports 2020-04, Vol.10 (1), p.7313-7313, Article 7313
Main Authors: Barcellos, Débora Pereira Diniz Correia, Farina, Ana Paula, Barcellos, Ramiro, Souza, Matheus Albino, Borba, Márcia, Bedran-Russo, Ana Karina, Bello, Yuri Dal, Pimenta Vidal, Cristina De Mattos, Cecchin, Doglas
Format: Article
Language:English
Subjects:
692/700/3032/3065
692/700/3032/3099
692/700/3032/3123
Acetic acid
Apatite
Collagen
Dentin
Edetic acid
Endodontics
Fourier transforms
Glycolic acid
Humanities and Social Sciences
Kruskal-Wallis test
Mechanical properties
multidisciplinary
pH effects
Root canals
Scanning electron microscopy
Science
Science (multidisciplinary)
Spectrum analysis
X-ray spectroscopy
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Summary:The objective of this study was to evaluate the effects of glycolic acid (GA) (with pH 1.2 and 5) and ethylenediaminetetraacetic acid (EDTA) on the chemical and mechanical properties of dentin to investigate the potential use of GA as final irrigant in the root canal therapy. Specifically, changes in microhardness, smear layer removal, erosion, mineral content distribution, apatite/collagen ratio and flexural strength of mineralized dentin treated with GA were assessed. Saline solution was used as a negative control. Knoop microhardness (KHN) was measured on the root canal lumen of root segments. Dentin beams were used for 3-point flexural strength (σ) test. Scanning electron microscopy (SEM) images of root sections were obtained for evaluation of smear layer removal and dentin erosion on root segments and energy dispersive X-ray spectroscopy (EDS) was used for mineral content distribution. The apatite/collagen ratio (A/C) in dentin powder were examined by Fourier transform infrared (FTIR) spectroscopy. KHN, σ and A/C results were statistically analyzed with ANOVA and Tukey tests (α = 0.05). Smear layer and dentin erosion scores were analyzed with Kruskal-Wallis and Dunn tests (α = 0.05). Root dentin treated with EDTA and GA presented similar KHN regardless of the pH (p > 0.05). However, KHN was significantly reduced in EDTA and GA groups when compared to control group (p
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-020-64450-1