| ORIGINAL ARTICLE |
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| Year : 2014 | Volume
: 17
| Issue : 1 | Page : 57-60 |
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Influence of temperature and concentration on the dynamic viscosity of sodium hypochlorite in comparison with 17% EDTA and 2% chlorhexidine gluconate: An in vitro study
Velayutham Gopikrishna, Priyanka Ashok, AR Pradeep Kumar, L Narayanan Lakshmi
Departments of Conservative Dentistry and Endodontics, Thai Moogambigai Dental College and Hospital, Golden George Nagar, Chennai, Tamil Nadu, India
Correspondence Address:
Priyanka Ashok
Departments of Conservative Dentistry and Endodontics, Thai Moogambigai Dental College and Hospital, Golden George Nagar, Chennai - 600 107, Tamil Nadu
India
 Source of Support: None, Conflict of Interest: None  | Check |
DOI: 10.4103/0972-0707.124142
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Aims: The aim of this study was to assess the influence of temperature and concentration on the dynamic viscosity of sodium hypochlorite in comparison with 17% EDTA and 2% chlorhexidine gluconate.
Settings and Design: In vitro
Materials and Methods: Dynamic viscosity measurements of sodium hypochlorite [NaOCl (5.25%, 2.6%, 1.25%)], EDTA (17%), and chlorhexidine gluconate [CHX, 2%] were measured using a rotational digital viscometer at room temperature (25°C). The influence of temperature (45°C, 60°C) and concentration (5.25%, 2.6%, and 1.25%) on the dynamic viscosity of NaOCl was also evaluated. The measurements were performed using a circulating water bath calibrated with a thermostat, and the dynamic viscosity measurements were noted in Centipoise (Cps).
Statistical Analysis Used: The tests used for the statistical analysis were Kolmogorov- Smirnov and Shapiro Wilk tests, one-way ANOVA, and independent sample t-test.
Results: Viscosity statistically increased with NaOCl concentration and decreased with increasing temperature. Amongst the tested NaOCl groups, 5.25% NaOCl at room temperature was significantly the most viscous (μ =1.5300 Cps) while 1.25% NaOCl at 60°C was significantly the least viscous (μ =1.1800 Cps).
Conclusions: 5.25% NaOCl and 17% EDTA are significantly viscous at room temperature. Elevating the temperature of 1.25% NaOCl to 60°C significantly reduces the viscosity of the NaOCl. |
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