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KMID : 1035020180190010004
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Endodontics and Dental Rehabilitation
2018 Volume.19 No. 1 p.4 ~ p.9
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Evaluation of physical properties for a development of ultrasonic canal irrigation file
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Kwak Sang-Won
Kim Hyeon-Cheol
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Abstract
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The purpose of this study was to evaluate the durability and efficiency of nickel titanium (NiTi) cleaning files with various heat treatments (HTx) and to select one for commercialized product. NiTi files with ISO #20 tip size was fabricated in six groups with different HTx (no HTx, 100 degree HTx, 150 degree HTx, 200 degree HTx, Poly group, Tin coating group) were evaluated. Bending stiffness and buckling resistance of each specimen were measured under American Dental Association Specification No. 28 and Specification ISO 3630-1. The selected one was compared with the DH tip and Endo Activator to evaluate the cleaning efficiency using natural root canal. Data were analyzed by the one-way ANOVA and the Duncan post-hoc test at a 95% significance level. The lowest bending stiffness was observed in the TiN coating group. And the TiN coating and poly group showed the lowest buckling resistance (p < 0.05). No significant difference was found in the canal cleaning efficiency among the tested groups (p > 0.05). Under the condition of this study, the file for ultrasonic root canal cleaning shows appropriate endurance and showed similar root canal cleaning efficiency as much as conventional cleaning aids using sonic or ultrasonic waves.
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KEYWORD
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ultrasonic, irrigation, file, nickel-titanium, root canal
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