The efficacy of an experimental single solution versus alternate use of multiple irrigants on root dentin microhardness.

Autor:	Akcay I; DDS, PhD, Assistant Professor, Department of Endodontology, School of Dentistry, Ege University, Izmir, Turkey., Erdilek N; DDS, PhD, Professor, Department of Endodontology, School of Dentistry, Ege University, Izmir, Turkey., Sen BH; DDS, PhD, Professor, Department of Endodontology, School of Dentistry, Ege University, Izmir, Turkey.
Jazyk:	angličtina
Zdroj:	Journal of clinical and experimental dentistry [J Clin Exp Dent] 2013 Apr 01; Vol. 5 (2), pp. e83-8. Date of Electronic Publication: 2013 Apr 01 (Print Publication: 2013).
DOI:	10.4317/jced.51007
Abstrakt:	Objectives: This study was carried-out to evaluate and compare the efficacy of various irrigants when used singly or in combination on the microhardness of root canal dentin. Study Design: A total of 50 root-halves were randomly divided into 5 groups immediately after the initial baseline microhardness measurements and treated with: Group-1; 7.5%Ethylenediaminetetraaceticacid (EDTA) + 2.5%sodium hypochlorite (NaOCl), Group-2; 7.5%ethyleneglycol-bis[b-aminoethylether]-N,N,N0,N0-tetraaceticacid (EGTA) + 2.5%NaOCl, Group-3; 7.5%trans1,2diaminocyclohexane NNN',N'tetraaceticacid (CDTA) + 2.5% NaOCl, Group-4; 7.5%EDTA + 2.5% Ethylenediamine (EDA), and Group-5; 1/1 (v/v) EDTA-EDA mixture + 1/1 (v/v) EDTA-EDA mixture. Fifty mL of each solution was used for 1 minute. The reference and post-treatment microhardness values were measured with a Vickers indenter under 80-gram load, 15-second dwell time. Data were analyzed by two-way ANOVA and Bonferroni tests (p=0.05). Results: All solutions decreased microhardness of dentin (p< 0.05). There was statistically significant difference between each group, except Group-1 and 4, after 1st solution application. While Group-2 resulted in a greater reduction of dentin hardness, Group-5 caused the least change in microhardness values, after 1st solution application (p< 0.05). No statistical difference was observed between Groups 1-4, after 2nd solution application. However, Group-5 showed a significant difference compared with all other groups, after 2nd solution application (p< 0.05). Conclusions: Under the experimental conditions, all tested solutions reduced the microhardness of the root canal dentin. EGTA was the most efficient chelating agent. EDTA-EDA single mixture has led to least change on the microhardness of root dentin. Key words:Microhardness, CDTA, EDTA, EGTA, Ethylenediamine.
Databáze:	MEDLINE
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