scholarly journals Comparison of cyclic fatigue resistance of novel NiTi rotary instruments with low taper angle

2021 ◽  
Vol 17 (3) ◽  
pp. 190-195
Author(s):  
Ahmet Demirhan Uygun ◽  
Yahya Güven ◽  
Mehmet Ünal
Keyword(s):  
Fatigue Resistance ◽  
Cyclic Fatigue ◽  
Taper Angle ◽  
Rotary Instruments ◽  
Niti Rotary Instruments

scholarly journals Wear analysis and cyclic fatigue resistance of electro discharge machined NiTi rotary instruments

2016 ◽  
Vol 30 (1) ◽  
pp. 64-68 ◽  
Author(s):  
F. Iacono ◽  
C. Pirani ◽  
L. Generali ◽  
P. Sassatelli ◽  
C. Nucci ◽  
...  
Keyword(s):  
Fatigue Resistance ◽  
Cyclic Fatigue ◽  
Wear Analysis ◽  
Rotary Instruments ◽  
Niti Rotary Instruments

scholarly journals Cyclic fatigue resistance of Mtwo NiTi rotary instruments used by experienced and novice operators – an in vivo and in vitro study

2012 ◽  
Vol 18 (6) ◽  
pp. MT41-MT45 ◽  
Author(s):  
Gianluca Plotino ◽  
Dina Al-Sudani ◽  
Stefano Pulino ◽  
Nicola M. Grande ◽  
Piero Alessandro Marcoli ◽  
...  
Keyword(s):  
Fatigue Resistance ◽  
In Vitro Study ◽  
Cyclic Fatigue ◽  
Vitro Study ◽  
Rotary Instruments ◽  
Niti Rotary Instruments

Effect of heat treatment on cyclic fatigue resistance, thermal behavior and microstructures of K3 NiTi rotary instruments

2013 ◽  
Vol 71 (6) ◽  
pp. 1656-1662 ◽  
Author(s):  
Seok Woo Chang ◽  
Yu-Chan Kim ◽  
Hyejung Chang ◽  
Kwang-Koo Jee ◽  
Qiang Zhu ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Thermal Behavior ◽  
Fatigue Resistance ◽  
Cyclic Fatigue ◽  
Rotary Instruments ◽  
Niti Rotary Instruments

scholarly journals Advancement of Mechanical Properties of Nickel-Titanium Rotary Endodontic Instruments by Spring Machining on the File Shaft

Materials ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5246
Author(s):  
Sangmi Ahn ◽  
Jung-Hong Ha ◽  
Sang Won Kwak ◽  
Hyeon-Cheol Kim
Keyword(s):  
Fatigue Resistance ◽  
Cyclic Fatigue ◽  
Nickel Titanium ◽  
Significance Level ◽  
Rotary Instruments ◽  
Niti Instruments ◽  
General Dentists ◽  
Niti Rotary Instruments ◽  
Distortion Angle ◽  
Paired T Test

Nickel-titanium (NiTi) endodontic rotary instruments are used extensively in root canal procedures by both general dentists and specialists. However, their vulnerability to fracture is the major reason for clinicians’ concern regarding their use. The objective of this study was to investigate the potential effects of spring machining of the file shaft on the fatigue and torsional resistances of NiTi rotary instruments. Three types of NiTi rotary systems with (S) and without (NS) spring machining were used in this study (n = 15 each): a spring file (SPR; #25/.06, SPR-S, SPR-NS), a ProTaper Next X2 (PTN; #25/variable taper, PTN-S, PTN-NS), and a ProTaper Gold F2 (PTG; #25/variable taper, PTG-S, PTG-NS). Spring machining was adjusted on the 6 mm of each file system’s shaft via a laser cutting process. The number of rotation cycles until fracture (i.e., cyclic fatigue resistance), ultimate torsional strength, the distortion angle, and the toughness of each subgroup were estimated with specially designed devices. The results were analyzed using a paired t-test at a significance level of 95%. NiTi rotary instruments with spring machining exhibited a higher cyclic fatigue resistance than instruments without spring machining. The groups with spring machining exhibited a higher toughness and larger distortion angle than the groups without it (p < 0.05). In conclusion, spring machining on the shank of NiTi instruments may provide a stress-bearing area and attenuate the torsional and cyclic fatigue of NiTi rotary instruments.

scholarly journals Effect of immersion in sodium hypochlorite on the cyclic fatigue resistance of three rotary instruments

2020 ◽  
Vol 23 (6) ◽  
pp. 554
Author(s):  
AnaGrasiela Da Silva Limoeiro ◽  
Daiane Nogueira ◽  
CarlosEduardo Da Silveira Bueno ◽  
AugustoShoji Kato ◽  
AlexandreSigrist De Martin ◽  
...  
Keyword(s):  
Fatigue Resistance ◽  
Sodium Hypochlorite ◽  
Cyclic Fatigue ◽  
Rotary Instruments

Effect of autoclave sterilization on cyclic fatigue and torsional fracture resistance of NiTi rotary instruments

Odontology ◽  
2019 ◽  
Vol 108 (2) ◽  
pp. 194-201 ◽  
Author(s):  
Wooyoung Kim ◽  
Soram Oh ◽  
Gil-Joo Ryu ◽  
Tae-Hwan Kim ◽  
Sung-Jae Kim ◽  
...  
Keyword(s):  
Fracture Resistance ◽  
Cyclic Fatigue ◽  
Rotary Instruments ◽  
Torsional Fracture ◽  
Niti Rotary Instruments

Influence of Kinematics on the Cyclic Fatigue Resistance of Replicalike and Original Brand Rotary Instruments

2020 ◽  
Vol 46 (8) ◽  
pp. 1136-1143 ◽  
Author(s):  
Jorge N.R. Martins ◽  
Emmanuel João Nogueira Leal Silva ◽  
Duarte Marques ◽  
António Ginjeira ◽  
Francisco Manuel Braz Fernandes ◽  
...  
Keyword(s):  
Fatigue Resistance ◽  
Cyclic Fatigue ◽  
Rotary Instruments

Measurement of the trajectory of different NiTi rotary instruments in an artificial canal specifically designed for cyclic fatigue tests

2009 ◽  
Vol 108 (3) ◽  
pp. e152-e156 ◽  
Author(s):  
Gianluca Plotino ◽  
Nicola M. Grande ◽  
Massimo Cordaro ◽  
Luca Testarelli ◽  
Gianluca Gambarini
Keyword(s):  
Cyclic Fatigue ◽  
Fatigue Tests ◽  
Rotary Instruments ◽  
Niti Rotary Instruments

scholarly journals Comparison of cyclic fatigue resistance of XP-endo Shaper, HyFlex CM, FlexMaster and Race instruments

2018 ◽  
Vol 12 (3) ◽  
pp. 208-212 ◽  
Author(s):  
Mehmet Adiguzel ◽  
Ipek Isken ◽  
Ismail Ilker Pamukcu
Keyword(s):  
Body Temperature ◽  
Fatigue Resistance ◽  
Cyclic Fatigue ◽  
Radius Of Curvature ◽  
Rotary Instruments ◽  
Recorded Data ◽  
The Difference ◽  
Number Of Cycles ◽  
Cycles To Failure ◽  
One Way Anova

Background. The aim of this study was to compare the cyclic fatigue resistance of XP-endo Shaper, HyFlex CM, FlexMaster and Race rotary instruments at body temperature (37±1°C). Methods. Twenty XP-endo Shaper (#30/.01), 20 HyFlex CM (#30/.04), 20 FlexMaster (#30/.04) and 20 Race (#30/.04) instruments were tested at body temperature (n=20). The instruments were evaluated in artificial canals with a 3-mm radius of curvature and 60° angle of curvature to the center of the 1.5-mm-wide canal. Each instrument was rotated until fracture occurred and the number of cycles to failure (NCF) recorded. Data were analyzed using one-way ANOVA and Tukey HSD tests (P<0.05). Results. The difference in the NCF of all the instruments was statistically significant (P<0.05). The order of the instruments from the highest to the lowest NCF was as follows: XP-endo Shaper (3064.0±248.1), HyFlex CM (1120.5±106.1), FlexMaster (569.8±48.4) and Race (445.5±53.5). Conclusion. Under the limitations of the present study, XP-endo Shaper instruments were more resistant to cyclic fatigue than the #30/.04 nickel-titanium rotary instruments immersed in water at simulated body temperature.

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