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.
journal_name
BMC Oral Healthjournal_title
BMC oral healthauthors
Sahebi S,Sobhnamayan F,Moazami F,Naseri Mdoi
10.1186/s12903-020-01320-2subject
Has Abstractpub_date
2020-11-12 00:00:00pages
326issue
1issn
1472-6831pii
10.1186/s12903-020-01320-2journal_volume
20pub_type
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