Year : 2019 | Volume
: 7 | Issue : 3 | Page : 151--155
Effect of sterilization on cyclic fatigue resistance of Proflexendo endodontic rotary files
Emad O Alshwaimi
Department of Restorative Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
Background: Proflexendo file (Nexen, Houston, TX, USA) is a recently developed, novel nickel-titanium rotary file. However, several physical properties of the Proflexendo system remain to be investigated.
Objectives: The aim of this study was to determine the effect of sterilization on cyclic resistance of Proflexendo files.
Material and Methods: A total of 120 unused Proflexendo rotary files (40 each of file sizes 40/0.04, 30/0.04 and 20/0.06) were used in this study. Each set of files was subdivided into four groups of ten files. Group 1 did not undergo any sterilization (control), Group 2 underwent two rounds (2×) of sterilization, Group 3 five rounds (5×) and Group 4 ten rounds (10×). Cyclic fatigue resistance was tested using an artificial canal with a 5-mm radius curve.
Results: The nonsterilized size 30/0.04 files had the highest cycles to failure, followed by the nonsterilized size 40/0.04 and 20/0.06 files (P < 0.001). With increasing rounds of sterilization, cycles to failure reduced for sizes 40 (2×, 5× and 10×) and 30 (2×) files compared with nonsterilized sizes 40 (P < 0.05) and 30 files (P < 0.001), respectively.
Conclusion: Under the conditions of the current study, the results provide preliminary evidence that autoclave sterilization of Proflexendo rotary files reduced their cyclic fatigue resistance, except for size 20 (2× and 5×) and 30 (10×) files, in which resistance increased. Single use of this file is recommended to reduce the risk of separation.
Prof. Emad O Alshwaimi
Department of Restorative Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, P. O. Box 1982, Dammam 31441
|How to cite this article:|
Alshwaimi EO. Effect of sterilization on cyclic fatigue resistance of Proflexendo endodontic rotary files.Saudi J Med Med Sci 2019;7:151-155
|How to cite this URL:|
Alshwaimi EO. Effect of sterilization on cyclic fatigue resistance of Proflexendo endodontic rotary files. Saudi J Med Med Sci [serial online] 2019 [cited 2020 Jan 24 ];7:151-155
Available from: http://www.sjmms.net/article.asp?issn=1658-631X;year=2019;volume=7;issue=3;spage=151;epage=155;aulast=Alshwaimi;type=0