Abstract
BackgroundTo introduce a new method for measurement of surface roughness of the endodontic instrument, before and after instrumentation, using the Field Emission Scanning Electronic Microscope (FE-SEM) combined with the ImageJ software.MethodsTwenty J-shape resin blocks were divided into two groups, ten blocks of each group. Simulated root canal inside the resin block was 16 mm length, 600 angle of curvature, and radius of 4.5 mm. Ten WaveOne Gold Primary and 10 Reciproc Blue R25 instruments were used for root canal instrumentation. The instruments were scanned before and after instrumentation with special molds made to ensure the same areas at the point located 3 mm from the tips of the instruments using the FE-SEM. These scanned images were analyzed using the ImageJ. The arithmetical mean roughness (Ra), root mean square roughness (Rq), and the average distance between the highest peak and lowest valley in each sampling length (Rz) were calculated by ImageJ for quantitative analyses. The paired-t test was performed to analyze the data using the SPSS 22.0 at the significance of .05.ResultsAlmost all surface roughness values were decreased. However, these decreases were not statistically significant (P > .05).ConclusionsThe FE-SEM combined with the ImageJ was the reliable and appropriate modality for measurement surface roughness of instruments.
Highlights
To introduce a new method for measurement of surface roughness of the endodontic instrument, before and after instrumentation, using the Field Emission Scanning Electronic Microscope (FE-SEM) combined with the ImageJ software
The manufacturers of both WaveOne Gold and Reciproc Blue instruments claim that thermal processing improves the flexibility and cyclic fatigue resistance of the NiTi instruments [6]
This study introduces a new method for measurement of surface roughness of the endodontic instrument, before and after resin block root canal instrumentation, using the FESEM combining with the ImageJ software (NIH, Bethesda, MD, USA)
Summary
To introduce a new method for measurement of surface roughness of the endodontic instrument, before and after instrumentation, using the Field Emission Scanning Electronic Microscope (FE-SEM) combined with the ImageJ software. The WaveOne Gold (WOG) (Dentsply Sirona, Maillefer, Ballaigues, Switzerland) and Reciproc Blue (RB) (VDW, Munich, Germany) were introduced with many special characteristics in designs and heat treatment processes [3, 4]. Both of systems were reciprocating single-file and single-use systems. The manufacturers of both WaveOne Gold and Reciproc Blue instruments claim that thermal processing improves the flexibility and cyclic fatigue resistance of the NiTi instruments [6]
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