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KMID : 1035320220490010027
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Korean Society for Dental Materials
2022 Volume.49 No. 1 p.27 ~ p.38
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Effect of size and taper on the mechanical properties of proFile and Hyflex CM Ni-Ti endodontic files
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Lee Hyung-Woo
Lee Chang-Ha
Lee In-Bog
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Abstract
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The purpose of this study was to investigate the effect of size and taper on the mechanical properties of two Ni-Ti files. A controlled memory Ni-Ti file, Hyflex CM (Coltene-Whaledent, Altstatten, Switzerland) and a conventional Ni-Ti file, ProFile (Dentsply Maillefer, Ballaigues, Switzerland) were used. The size and taper (sizer/taper values) were 20/.04, 25/.04, 25/.06 and 30/.04. The U-Mechanics Analyser (IB Systems, Seoul, Korea) was used to measure the bending, torsional, and fatigue fracture resistance of the files (n=5). ProFile showed elastic deformation, but Hyflex CM showed higher hysteresis with plastic deformation in bending resistance test. The bending and torsional resistance of ProFile increased with increasing size and taper, though the #25 and #30 files of Hyflex CM did not resulted in any change. Hyflex CM showed greater fatigue fracture resistance than ProFile in all sizes and tapers. Without considering root canal excavation efficiency, it is considered that Hyflex CM has better root canal trackability and fewer fatigue fractures than ProFile.
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KEYWORD
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Ni-Ti file, Bending resistance, Torsional resistance, Fatigue fracture resistance
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FullTexts / Linksout information
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Listed journal information
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