Cyclic Fatigue Testing of Three Different Rotary Nickel Titanium Endodontic Instruments in Simulated Curved Canals - An In-Vitro SEM Analysis
Introduction: Instrument separation is a serious concern in endodontics. Stainless steel instruments usually deform before they separate whereas Nickel Titanium instruments do not show any sign of deformation. Aim: The present study was to compare the cyclic rotations needed to fracture three d...
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| Format: | Article |
| Language: | English |
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JCDR Research and Publications Private Limited
2014-02-01
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| Series: | Journal of Clinical and Diagnostic Research |
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| Online Access: | https://jcdr.net/articles/PDF/4062/73-%207569_101213_R1_7569_CE[Ra]_PF1(PAK)_PFA(AK)_PF2(NJH)_BO(NJH)_(PUH)_P(u)_u.pdf |
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| author | Pallavi Reddy Y. Kavita S. C.V. SubbaRao |
| author_facet | Pallavi Reddy Y. Kavita S. C.V. SubbaRao |
| author_sort | Pallavi Reddy Y. |
| collection | DOAJ |
| description | Introduction: Instrument separation is a serious concern in
endodontics. Stainless steel instruments usually deform before
they separate whereas Nickel Titanium instruments do not show
any sign of deformation.
Aim: The present study was to compare the cyclic rotations
needed to fracture three different rotary nickel titanium endodontic
instruments namely Profile, K3 Endo, RaCe in simulated curved
canals having 2 different radii of curvature i.e., 5mm & 10mm with
a constant angle of curvature of 450
.The fractured surfaces were
analysed using Scanning Electron Microscopy (SEM).
Materials and Methods: Sixty rotary nickel titanium instruments
were used for analysis in this study. The instruments were divided
into three groups based on the different cross sections. Three
groups were further divided into two sub groups based on radius of
curvatures. Ten files were tested in each sub-group.
Results: Group A (Profile) showed increased number of cycles to
failure i.e., low incidence of fracture at both the radii of curvatures
when compared to the other two groups. SEM analysis showed
that in Group A the fractured surface of the files tested were
characterized by the presence of smooth area on their edges
associated with nucleation and slow fatigue crack propagation
when compared to Group B and C. Therefore Group A (Profile)
demonstrated least cyclic fatigue when compared to the other two
groups.
Conclusion: This study supports the careful use of instruments
in the root canal preparation giving an idea to clinical regarding
adequate time and fracture resistance in the curve canals. |
| first_indexed | 2024-04-13T16:21:10Z |
| format | Article |
| id | doaj.art-c75aad893c5d4803bb68367df8c51749 |
| institution | Directory Open Access Journal |
| issn | 2249-782X 0973-709X |
| language | English |
| last_indexed | 2024-04-13T16:21:10Z |
| publishDate | 2014-02-01 |
| publisher | JCDR Research and Publications Private Limited |
| record_format | Article |
| series | Journal of Clinical and Diagnostic Research |
| spelling | doaj.art-c75aad893c5d4803bb68367df8c517492022-12-22T02:39:56ZengJCDR Research and Publications Private LimitedJournal of Clinical and Diagnostic Research2249-782X0973-709X2014-02-018221121310.7860/JCDR/2014/7569.4062Cyclic Fatigue Testing of Three Different Rotary Nickel Titanium Endodontic Instruments in Simulated Curved Canals - An In-Vitro SEM AnalysisPallavi Reddy Y.0Kavita S.1C.V. SubbaRao2Reader, Department of Conservative Dentistry and Endondontics, Army College of Dental Sciences, Secunderabad, Andhra Pradesh-500087, India.Professor, Department of Conservative Dentistry and Endondontics, SRM University, India.Professor, Department of Conservative Dentistry and Endondontics, Saveetha University, India.Introduction: Instrument separation is a serious concern in endodontics. Stainless steel instruments usually deform before they separate whereas Nickel Titanium instruments do not show any sign of deformation. Aim: The present study was to compare the cyclic rotations needed to fracture three different rotary nickel titanium endodontic instruments namely Profile, K3 Endo, RaCe in simulated curved canals having 2 different radii of curvature i.e., 5mm & 10mm with a constant angle of curvature of 450 .The fractured surfaces were analysed using Scanning Electron Microscopy (SEM). Materials and Methods: Sixty rotary nickel titanium instruments were used for analysis in this study. The instruments were divided into three groups based on the different cross sections. Three groups were further divided into two sub groups based on radius of curvatures. Ten files were tested in each sub-group. Results: Group A (Profile) showed increased number of cycles to failure i.e., low incidence of fracture at both the radii of curvatures when compared to the other two groups. SEM analysis showed that in Group A the fractured surface of the files tested were characterized by the presence of smooth area on their edges associated with nucleation and slow fatigue crack propagation when compared to Group B and C. Therefore Group A (Profile) demonstrated least cyclic fatigue when compared to the other two groups. Conclusion: This study supports the careful use of instruments in the root canal preparation giving an idea to clinical regarding adequate time and fracture resistance in the curve canals.https://jcdr.net/articles/PDF/4062/73-%207569_101213_R1_7569_CE[Ra]_PF1(PAK)_PFA(AK)_PF2(NJH)_BO(NJH)_(PUH)_P(u)_u.pdfnickle titanium instrumentscyclic fatigueangle of curvatureradius of curvaturecleaning and shapingprocedural errors |
| spellingShingle | Pallavi Reddy Y. Kavita S. C.V. SubbaRao Cyclic Fatigue Testing of Three Different Rotary Nickel Titanium Endodontic Instruments in Simulated Curved Canals - An In-Vitro SEM Analysis Journal of Clinical and Diagnostic Research nickle titanium instruments cyclic fatigue angle of curvature radius of curvature cleaning and shaping procedural errors |
| title | Cyclic Fatigue Testing of Three Different Rotary Nickel Titanium Endodontic Instruments in Simulated Curved Canals - An In-Vitro SEM Analysis |
| title_full | Cyclic Fatigue Testing of Three Different Rotary Nickel Titanium Endodontic Instruments in Simulated Curved Canals - An In-Vitro SEM Analysis |
| title_fullStr | Cyclic Fatigue Testing of Three Different Rotary Nickel Titanium Endodontic Instruments in Simulated Curved Canals - An In-Vitro SEM Analysis |
| title_full_unstemmed | Cyclic Fatigue Testing of Three Different Rotary Nickel Titanium Endodontic Instruments in Simulated Curved Canals - An In-Vitro SEM Analysis |
| title_short | Cyclic Fatigue Testing of Three Different Rotary Nickel Titanium Endodontic Instruments in Simulated Curved Canals - An In-Vitro SEM Analysis |
| title_sort | cyclic fatigue testing of three different rotary nickel titanium endodontic instruments in simulated curved canals an in vitro sem analysis |
| topic | nickle titanium instruments cyclic fatigue angle of curvature radius of curvature cleaning and shaping procedural errors |
| url | https://jcdr.net/articles/PDF/4062/73-%207569_101213_R1_7569_CE[Ra]_PF1(PAK)_PFA(AK)_PF2(NJH)_BO(NJH)_(PUH)_P(u)_u.pdf |
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