The effect of curvature angle and rotational speed on the cyclic fatigue of three types of rotary instrument (In vitro) : comparative study
Joint Authors
al-Azzawi, Abd al-Karim J.
Mukhlif, Thair A.
Source
Journal of Baghdad College of Dentistry
Issue
Vol. 25, Issue 1 (31 Mar. 2013), pp.38-42, 5 p.
Publisher
University of Baghdad College of Dentistry
Publication Date
2013-03-31
Country of Publication
Iraq
No. of Pages
5
Main Subjects
Topics
Abstract EN
Background : The fracture of instruments within root canal during endodontic treatment is a common incidence, fracture because of fatigue through flexure occurs due to metal fatigue, this study aimed to assess the effect of curvature angle and rotational speed on the cyclic fatigue of different type of Endodontic NiTi Rotary Instruments and compare among them. Materials and method : Three types of rotary instruments with tip size 0.25 : ProTaPer F2 (Densply, Malifier) Revo-S SU (0.06 taper, MicroMega) and RaCe system (0.06 taper, FKG, Dentaire), Forty file of each instrument were used within two canals with angle of curvature (40 and 60 )at two speed (250&400)RPM, twelve group were formed for all instruments(total number = 120), ten file for each group.
The testing canals customized within stainless steel block covered with glass face, the time to fracture recorded and the mean of cycles to fracture (MCF) detected for each instrument.
Data were analyzed statistically by ANOVA, LSD and Independent T-test at 5 % significant level. Result : there was a highly significant difference of curvature angle and significant difference of rotational speed on the fracture resistance of instruments.
RaCe revealed the best fracture resistance followed by ProTaper then Revo-S that showed the less resistance. Conclusion : The rotary instruments more prone to fracture when used at more curvature angle and higher rotational speed, as well as the rotary instruments differ from each other according to manufacturing process, taper, cross section and other factors.
American Psychological Association (APA)
Mukhlif, Thair A.& al-Azzawi, Abd al-Karim J.. 2013. The effect of curvature angle and rotational speed on the cyclic fatigue of three types of rotary instrument (In vitro) : comparative study. Journal of Baghdad College of Dentistry،Vol. 25, no. 1, pp.38-42.
https://search.emarefa.net/detail/BIM-324048
Modern Language Association (MLA)
Mukhlif, Thair A.& al-Azzawi, Abd al-Karim J.. The effect of curvature angle and rotational speed on the cyclic fatigue of three types of rotary instrument (In vitro) : comparative study. Journal of Baghdad College of Dentistry Vol. 25, no. 1 (Mar. 2013), pp.38-42.
https://search.emarefa.net/detail/BIM-324048
American Medical Association (AMA)
Mukhlif, Thair A.& al-Azzawi, Abd al-Karim J.. The effect of curvature angle and rotational speed on the cyclic fatigue of three types of rotary instrument (In vitro) : comparative study. Journal of Baghdad College of Dentistry. 2013. Vol. 25, no. 1, pp.38-42.
https://search.emarefa.net/detail/BIM-324048
Data Type
Journal Articles
Language
English
Notes
Includes appendices : p. 41-42
Record ID
BIM-324048