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BMC Oral Health
Published in: BMC Oral Health 1/2020

Open Access 01-12-2020 | Research article

Assessment of sodium thiosulfate neutralizing effect on micro-hardness of dentin treated with sodium hypochlorite

Authors: Safoora Sahebi, Fereshteh Sobhnamayan, Fariborz Moazami, Mohammadhasan Naseri

Published in: BMC Oral Health | Issue 1/2020

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Abstract

Background

This study aims to evaluate the ability of sodium thiosulfate (STS) to neutralize the adverse effect of sodium hypochlorite (NaOCl) on dentin micro-hardness.

Methods

Fifty single-rooted teeth were longitudinally sectioned. The samples divided into a control and four sample groups (n = 20). All the samples were immersed in different solutions as follows, Control: Normal saline for 15 min, G1and G2: 2.5% NaOCl for 15 min, G3: 2.5% NaOCl for 15 min, followed by 5% STS for 10 min, G4: Normal saline for 15 min followed by 5% STS for 10 min. All groups except G1 incubated for one week before the test. The micro-hardness of samples was measured. Data were analyzed using the Kruskal–Wallis test for pairwise comparisons. A p value < 0.05 was considered significant.

Results

All groups showed a significant decrease in the micro-hardness value compared with the control group. NaOCl for one week (G2) reduced the micro-hardness of dentine compared with samples, tested immediately after immersion in NaOCl (G1) (p < 0.05). NaOCl alone (G2) or treated with STS (G3) resulted in a significant decrease in micro-hardness compared with the STS group (G4) (p < 0.05).

Conclusions

STS as a neutralizing agent could not prevent the dentin micro-hardness downturn caused by NaOCl.
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Metadata
Title
Assessment of sodium thiosulfate neutralizing effect on micro-hardness of dentin treated with sodium hypochlorite
Authors
Safoora Sahebi
Fereshteh Sobhnamayan
Fariborz Moazami
Mohammadhasan Naseri
Publication date
01-12-2020
Publisher
BioMed Central
Published in
BMC Oral Health / Issue 1/2020
Electronic ISSN: 1472-6831
DOI
https://doi.org/10.1186/s12903-020-01320-2

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