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Publisher: Peytchinski Publishing Ltd.
ISSN: 1312-773X (Online)
Issue: 2021, vol. 27, issue1
Subject Area: Dental Medicine
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DOI: 10.5272/jimab.2021271.3534
Published online: 19 January 2021
Original article
J of IMAB. 2021 Jan-Mar;27(1):3534-3538
THE EFFECT OF DIFFERENT IRRIGANTS WITH OR WITHOUT ULTRASONIC ACTIVATION ON ROOT DENTIN MICROHARDNESS
Irina Tsenova-Ilieva
, Emilia Karova,
Department of Conservative Dentistry, Faculty of Dental Medicine, Medical University - Sofia, Bulgaria.
ABSTRACT:
Purpose: The aim of this in vitro study was to evaluate the effect of different irrigation regimens of root dentin microhardness.
Materials and methods: Twenty extracted, single-rooted, non-endodontically treated upper incisors were decoronated and further sectioned longitudinally in buccolingual direction. The surfaces of all forty samples were polished, evenly distributed into four groups (n=10) and then immersed in the following solutions: group 1: 2% sodium hypochlorite for 2 minutes followed by 17% EDTA for 2 minutes; group 2: 2% sodium hypochlorite for 2 minutes followed by 17% EDTA for 2 minutes, both ultrasonically activated; group 3: 5.25% sodium hypochlorite for 2 minutes followed by 17% EDTA for 2 minutes; group 4: distilled water (control group). Afterwards, the samples were dried and subjected to microhardness testing by using 300g load with a dwell time of 20 seconds. The averaged values of each sample’s Vicker’s hardness numbers were calculated and statistically analyzed.
Results: All irrigation regimens significantly decreased the mean hardness of dentin when compared to the control group 4 (p<0.05). Pair-wise comparison between the values of Group 1, Group 2, Group 3 resulted in no statistical significance (p>0.05) regardless of the concentration and the ultrasonic activation of the solutions.
Conclusions: The dentin microhardness was decreased regardless of the irrigation protocols used. Additional studies should clarify the clinical relevance of the compromised mechanical properties of dentin tissue and their relationship with the overall treatment success.
Keywords: Dentin microhardness, irrigation, sodium hypochlorite, EDTA,
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Please cite this article as: Tsenova-Ilieva I, Karova E. The effect of different irrigants with or without ultrasonic activation on root dentin microhardness. J of IMAB. 2021 Jan-Mar;27(1):3534-3538. DOI: 10.5272/jimab.2021271.3534
Correspondence to: Irina Tsenova-Ilieva, Assistant Professor, Department of Conservative Dentistry, Faculty of Dental Medicine, Medical University – Sofia; 1, St Georgi Sofiyski blvd., 1413 Sofia, Bulgaria; E-mail: irinatsenova@yahoo.com
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Received: 20 March 2020
Published online: 19 January 2021