Journal of Conservative Dentistry
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Year : 2019  |  Volume : 22  |  Issue : 5  |  Page : 459-463

Effect of NaOCl and EDTA solutions on topography of ESX, TruShape and ProTaper gold NiTi rotary instruments – An Atomic force microscopic study

1 Department of Conservative Dentistry and Endodontics, Malla Reddy Dental College for Women, Suraram, Hyderabad, Telangana, India
2 Department of Conservative Dentistry and Endodontics, Sibar Institute of Dental Sciences, Guntur, Andhra Pradesh, India

Correspondence Address:
Dr. Abhijit M Pallewar
Department of Conservative Dentistry and Endodontics, Malla Reddy Dental College for Women, Suraram, Hyderabad - 500 055, Telangana
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/JCD.JCD_34_20

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Aim: The study was aimed to evaluate the effect of 5.25% NaOCl and 17% ethylenediaminetetraacetic acid (EDTA) Solutions on Surface Topography of ESX, TruShape, and ProTaper Gold nickel-titanium (NiTi) Rotary Instruments using Atomic Force Microscope (AFM). Materials and Methodology: A total of 27 each of three commercially available brands of endodontic NiTi instruments were analyzed, which were divided into three groups as follows: Group I: ESX (Brasseler, USA) Group II: Tru shape (Dentsply Tulsa, USA) Group III: Pro Taper Gold (Dentsply Tulsa, USA). These files were further divided into three subgroups containing nine files each, no immersion, immersion in 5.25% NaOCl for 5 min, and immersion in 17% EDTA for 5 min. Surface areas along 3 mm sections at the tip of the files (perfect squares of 10 μm × 10 μm) were analyzed using AFM operating in contact mode under ambient conditions. Statistical Analysis: Data were analyzed using two-way ANOVA and pairwise comparison of three main groups with respect to Ra and RMS by Tukey's multiple posthoc procedures. Results: Three-dimensional AFM images of the surface of all the rotary NiTi instruments, including new and those immersed in 5.25% NaOCl and 17% EDTA solutions, revealed topographic irregularities at the nanometric scale. Ra and RMS values of instruments treated with 5.25% NaOCl and 17% EDTA solutions were statistically higher than that of the new ones (P < 0.05). Conclusion: Using AFM for analysis indicated that short-term contact between 5.25% NaOCl and 17% EDTA solutions and NiTi instruments caused alterations in the topography of instruments.

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