Cyclic Fatigue of Reciproc and Reciproc Blue Nickel-titanium Reciprocating Files at Different Environmental Temperatures

Journal of Endodontics
G PlotinoLeonzio Fortunato

Abstract

The aim of the present study was to investigate the impact of ambient temperature on the life span of nickel-titanium (NiTi) files. Cyclic fatigue testing of NiTi instruments was performed in a stainless steel artificial canal. During the experiment, 4 different temperatures (0°C, 20°C, 35°C, and 39°C) were used in a thermostatic bath controlled using electronic and infrared controls. Eighty R25 Reciproc Blue (VDW, Munich, Germany) and 80 R25 Reciproc (VDW) instruments were reciprocated in the artificial canal until fracture occurred, and the time to fracture and the length of the fractured fragment were recorded. The phase transformation temperature for 3 instruments of each type was analyzed by differential scanning calorimetry. One-way analysis of variance and Bonferroni tests were used to statistically analyze the data at a 5% significance level (P < .05). Reciproc Blue instruments were significantly more resistant to cyclic fatigue than Reciproc at all the temperatures tested (P < .05). Fatigue resistance was proportionally higher as the environmental temperature decreased (0°C > 20°C > 35°C > 39°C). No significant difference was registered for the length of the fractured fragment of both instruments tested at all temperatu...Continue Reading

Citations

Jul 4, 2019·International Endodontic Journal·M HülsmannE Schäfer
Sep 7, 2019·International Endodontic Journal·L GeneraliE Pedullà
Dec 21, 2019·Journal of Dental Research, Dental Clinics, Dental Prospects·Mustafa GündoğarGülşah Uslu
Sep 29, 2019·Australian Endodontic Journal : the Journal of the Australian Society of Endodontology Inc·Raymond ScottOve A Peters
Jun 3, 2020·Restorative Dentistry & Endodontics·Emmanuel João Nogueira Leal SilvaTatiana Kelly da Silva Fidalgo
Dec 29, 2020·Australian Endodontic Journal : the Journal of the Australian Society of Endodontology Inc·Ericson Janolio de CamargoRodrigo Ricci Vivan
Dec 10, 2019·Journal of Endodontics·Burcu SerefogluMehmet Kemal Çalışkan

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