Minerva Stomatologica 杂志投稿-刊鹿论文编译

Cyclic fatigue comparison among endodontic instruments with similar cross section and different surface coating.

Abstract:

BACKGROUND\nThe aim of this study was to analyze the influence of rotary instruments geometry and surface titanium-nitride (TiN) treatment on the fatigue fracture, through the comparison of cyclic fatigue resistance of two endodontic systems that have similar cross-sectional design and different surface coating.\n\n\nMETHODS\nIn this study 130 Mtwo (10/.04; 15/.05; 20/.06; 25/.06; 30/.05; 35/.04; 40/.04) and Easy Shape (15/.04; 20/.05; 25/.06; 30/.05; 35/.04; 40/.04) were tested for cyclic fatigue resistance. Time to fracture (TtF) was determined by counting the seconds of continuous rotation until final fracture in an artificial canal with 60° angle and a 5 mm radius of curve. The fracture surface of each fragment was examined with a scanning electron microscope (SEM). Data were subjected to one-way analysis of variance (ANOVA) and Tukey post-hoc tests.\n\n\nRESULTS\nMtwo perform a significantly (P<0.001) higher number of cycles to fracture (NCF) compared with Easy Shape of the same size and taper. The comparison between Mtwo and Easy Shape instruments with the same taper showed higher TtF values of Mtwo files than the Easy Shape ones (P<0.001) while there were no differences among Mtwo and Easy Shape instruments with the same tip, (P>0.05).\n\n\nCONCLUSIONS\nMtwo exhibit a higher NCF thanks to the smaller metal volume contained in their core. Titanium-nitride coating does not influence the performance of Easy Shape instruments on static test of cyclic fatigue.

Author Listing： Eugenio Pedullà;Gianluca Plotino;Mauro Scibilia;Nicola M Grande;Daniele De Santis;Alessia Pardo;Luca Testarelli;Gianluca Gambarini

Volume： 68 2

Pages： \n 67-73\n

DOI： 10.23736/S0026-4970.17.04009-2

Language： English

Journal： Minerva stomatologica

Minerva Stomatologica

MINERVA STOMATOL

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发行时间：-

ISSN：0026-4970

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收录数据库：ESCI/Scopus收录

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出版社：Edizioni Minerva Medica

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偏重研究方向	DENTISTRY, ORAL SURGERY & MEDICINE-
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WOS期刊SCI分区（2021-2022年最新版）

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